Currently viewing the category: "Beetles"

Subject:  Is this Japanese Beetle going to eat my medical marijuana?
Geographic location of the bug:  Ohio
Date: 07/28/2021
Time: 12:28 PM EDT
Your letter to the bugman:  Dear Bugman,
The Japanese Beetles were terrible this year.  They ate all the leaves off my neighbor’s ornamental plum tree.  They decimated the roses, and at times they seem to want to eat everything in sight.  They ate my friend’s hawthorn.  I keep finding one or two when I inspect the medical marijuana I just started growing this year, but they don’t seem to be eating the plants.  I have tried to research Japanese Beetles and marijuana and I was thrilled with your section on Insects and Cannabis called What’s on my Woody Plant?
So I expect my girls to start producing buds soon.  Do I need to fear the Japanese Beetles eating my marijuana?
How you want your letter signed:  Paranoid Pot Grower

Japanese Beetle on medical Marijuana

Dear Paranoid Pot Grower,
Time may be on your side, especially since the Japanese Beetles you are finding do not appear to be eating the leaves on your plants.  According to BugGuide:  “Larvae feed on roots of many plants. adults feed on more than 350 different species of plants, but are especially fond of roses, grapes, smartweed, soybeans, corn silks, flowers of all kinds, and overripe fruit.”   Your buds are flowers, so they might be attractive to the beetles if there is no other preferred food to be eaten.  BugGuide also states Japanese Beetles are active “mostly: June-Sept” and we suspect your harvest will be after late September, so you shouldn’t have to worry about loosing your entire crop.  According to Holy Moly Seeds, Japanese Beetles eat:  “Mainly roses, grapes, cannabis, beans, strawberries, tomatoes, peppers, grapes, hops, cherries, plums, pears, peaches, berries, corn, peas, and many more. They feed on the foliage of the plant, eating the material in between veins.”  According to Medical Marijuana (Cannabis sativa x indica)
:  “Japanese beetles will eat the entire leaf. Just like home gardens a population of Japanese beetles can kill a whole plant by destroying its leaves so badly it cannot photosynthesize enough to support itself” but you do not seem to be experiencing that.  Medical Marijuana Cannabis Pests says nothing about leaves and buds, but it does state:  “The most serious root pests are flea beetle grubs (Psylliodes attenuata) and white root grubs — Japanese beetles (Popillia japonica) and chafers (Melolontha hippocastani and M. melolontha).”  Please give us an update if you do find the Japanese Beetles are eating your buds.

Subject:  Can you ID this beetle?
Geographic location of the bug:  Merritt Island, Brevard County, FL
Date: 08/12/2021
Time: 02:52 PM EDT
Your letter to the bugman:  Hello,
Hoping you can ID these beetles, which are located on (and apparently snacking on) railroad vine (Ipomoea pes-caprae) in a residential landscape. These are about twice the size of your standard issue ladybug beetle. Photo taken Aug. 12, 2021, mid-afternoon, south facing planting bed.
How you want your letter signed:  LG

Tortoise Beetle

Dear LG,
We quickly found your Tortoise Beetle,
Chelymorpha cribraria, on Featured Creatures where it states:  “The genus Chelymorpha Boheman contains more than 100 species, which are mostly Neotropical in distribution. Two species have been recorded (Blatchley 1924) previously from Florida: Chelymorpha cassidea (Fabricius) and Chelymorpha geniculata Boheman. The endemic Florida Chelymorpha geniculata has had a checkered taxonomic history. It is often considered either a synonym or subspecies of Chelymorpha cassidea (Balbaugh and Hays 1972). Both are uniformly tan to red-brown in color with 12 to 14 black spots on the elytra and four to six on the pronotum. Chelymorpha cribraria is extremely polymorphic in color (Vasconcellos-Neto 1988), and most of the color forms have been described as separate species. Only two color forms have been found in Florida so far. The most common color form in Florida is bicolored, with pronotum black and elytra brick-red or tan. Much less common is the color form having a tan ground color with metallic reflections, numerous black speckles, and longitudinal red stripes on the elytra.”  According to BugGuide:  “adventive in FL (established), native to S. America & West Indies” and “showed up in so. FL following hurricane Andrew (Sep. 1993). ”  The species has no common name.

Tortoise Beetles

Thank you very much! I was sorta on the right track: was thinking leaf beetles but just didn’t find the magic word combo to get me to the Featured Creatures entry or anywhere else that made me think I was on the right track for sure. Had I used “tortoise beetle,” I probably would’ve found it. Anyway, again, thanks!

Subject:  Weird bug found at work
Geographic location of the bug:  Grays harbor washington
Date: 08/11/2021
Time: 06:14 PM EDT
Your letter to the bugman:  Found this bug while I was at work and it’s massive, was probably 2 1/2 almost 3 inches. kinda think it’s a June bug but it doesn’t got the stripes
How you want your letter signed :  What is it?

Unidentified Prionid

We are only able to provide you with a partial identification on your discovery.  This is a Longhorned Borer Beetle in the family Cerambycidae, and it is a member of the subfamily Prioninae, the Root Borers.  Unfortunately we are unable to provide you with a species name.  Though you submitted three images, one was a red rectangle and one a black rectangle with no insects visible.  The image we posted has many identifying features hidden in the grass.  The gray coloration and lack of thoracic spines are distinctive, but it doesn’t look like any of the species on BugGuide.  Is Grays Harbor a town that gets international ships?  Perhaps one of our readers with more experience will be able to provide a species identification. 

Sorry it wouldn’t let me put anymore pictures on because there wasn’t enough space for 2 pictures but I do have a video and we just got a storage container from China at my work like 4 months ago.

Subject:  Big black bug
Geographic location of the bug:  Czech Republic
Date: 08/09/2021
Time: 12:47 PM EDT
Your letter to the bugman:  Today at 5PM CET we found this guy and we wonder what kind of bug it might be. He was around 5cm long. And his mandibles were pretty big. We tried to look it up ourselves, but not successfuly. Hope you can help although the photos I took aren’t the best quality. Thanks.
How you want your letter signed:  Tess

Prionus coriarius we believe

Dear Tess,
Your beetle is classified as a Long Horned Borer Beetle in the family Cerambycidae, and further subclassified as a Root Borer in the subfamily Prioninae.  We believe it is
Prionus coriarius which we found pictured on European Environment Agency which has:  “has very limited information about this species.”


Subject:  Bug ID
Geographic location of the bug:  Washington State central Cascades forest
Date: 08/05/2021
Time: 08:16 PM EDT
Your letter to the bugman:  I can’t find anyone who can ID this insect I saw on a hike last week. Can you help?
How you want your letter signed:  Debbie

Flower Longicorn: Pachyta armata

Dear Debbie,
We first posted an image of this unusual Flower Longicorn,
Pachyta armata, back in 2019 and we spent considerable more time trying to identify it originally.  There is not much information available on this species with no common name.  According to Montana Field Guides:  “We do not yet have descriptive information on this species.  Please try the buttons above to search for information from other sources.”  According to Jungle Dragon:  “This beetle is distributed in USA.”  BugGuide reports sightings along Pacific coast states and Canada.

Subject:  Black Ladybug?
Geographic location of the bug:  Ventura, California
Date: 08/06/2021
Time: 01:04 AM EDT
Your letter to the bugman:  Dear Bugman,
I have been seeing so many fabulous bugs this summer but mostly practicing mindfulness and present moment awareness and haven’t captured many pictures for you to identify- but this evening on a neighborhood walk I spotted a black ladybug (?) and wondered if that is a thing?
How you want your letter signed:  Melanie on the Irish Chain

Conspicua Form: Multicolored Asian Lady Beetle

Dear Melanie on the Irish Chain,
Based on this BugGuide image, this is the “Conspicua Form” of the Multicolored Asian Lady Beetle,
Harmonia axyridis.  The common name refers to the extreme color variations possible in this introduced species, including the familiar orange with black spots, but the number of spots may vary, the background color ranges from light to deep orange, and often the spots are absent.  Of the “Conspicua form” BugGuide states:  “A melanic (darkly pigmented) form of Harmonia axyridis. Entirely black with a white central head marking, two rounded pronotum markings, and two red or orange elytral markings. Occasional extreme variants may have reduced or absent white markings on the pronotum.  The extended black pigmentation forms a layer over the usual pattern. Thus, sometimes the standard pattern shows through. In these cases, a black spot from the usual form will show over the red marking, creating a crescent or C-shaped spot.” Your individual displays the “C-shaped spot.”