Currently viewing the category: "Scarab Beetles"
What's That Bug? does not endorse extermination

Subject:  Rescued Dung Beetles
Geographic location of the bug:  Hialeah Florida
Date: 03/15/2019
Time: 12:12 PM EDT
Your letter to the bugman:  I often see dung beetles drowning in my swimming pool-not sure why they wind up in there so often. Last Dec 31 I netted four of them in a few minutes and set them on a wall to dry out and take photos before they wandered away. One was gone before I could get back with the camera. I love how their shells vary- one had a beautiful long curving horn and side spikes on the shield. I wonder if that’s a variation due to age or gender or is it just that some beetles get lucky in the shell genetic lottery?
How you want your letter signed:  Marian

Rainbow Scarabs

Dear Marian,
Your image of rescued Rainbow Scarabs, a type of Dung Beetle, is awesome, as is the rescue story.  We are tagging this posting with the Bug Humanitarian Award.  Male Rainbow Scarabs have the horn, but there is some genetic lottery involved as well.  According to BugGuide:  “Pronotum of ‘major’ male has sharp posterior angles.  Major males, depicted, are easier to differentiate than minor males (w/ short horns) and females (w/ very short horns).”

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Subject:  What’s in the eggplant patch?
Geographic location of the bug:  Brisbane, Australia (inner city)
Date: 02/15/2019
Time: 01:41 AM EDT
Your letter to the bugman:  Hi Bugman,
These bugs have been in my eggplant patch for some time now. I am still getting eggplants so they don’t seem too harmful, but no one knows what they are! They can fly, but they seem to prefer walking. I once counted 30 in the patch.
Location: Brisbane, Australia. Time: Summer. Maybe relevant this is in a fifth floor balcony garden. There are plenty of bugs in the garden overall, but these ones seem to have a monopoly on the eggplant.
How you want your letter signed:  The Curious Eggplant Grower

Mango Flower Beetles

Dear Curious Eggplant Grower,
You had us with your subject line:  What’s in the eggplant patch?
These are Scarab Beetles and we are inclined to speculate they are in the Fruit and Flower Chafer subfamily Cetoniinae.  We are continuing research; we just wanted you to know where to begin your own research.
There seems to be a considerable amount of variation in color and markings on the Mango Flower Beetle,
Protaetia fusca, pictured on the Brisbane Insect site, but though none exactly matches the warm golden-bronze color of the individuals you submitted, we nonetheless believe that species is correct.
Based on the images and the statement “Elytra of male with apical spines, female lacking spines” posted on the Hawaiian Scarab ID site, the individual on the right in your image, with the spines on the posterior ends of the elytra or wing covers, is a male.  The site also states:  “In Australia, both adults and larvae are found throughout the year. Females deposit as many as 147 eggs in humus during their 6–7 month adult lifespans. Larvae feed on organic materials within the soil rather than live plant roots and reached maturity in roughly 50 days. Natural enemies include wasps (
Scolia spp.) that attack larvae, a variety of birds, and Aspergillus fIavus (a fungus that sometimes infects adults).”
We have been getting numerous comments lately from Australia regarding the Blue Flower Wasp, an Australian Scoliid Wasp, indicating they have plentiful prey, the larvae of Scarab Beetles.

Thanks so much! I think you are on the money!
Although, I am a little fascinated they are just sticking to the eggplants, and ignoring the other delights, such as the mango tree!
What's That Bug? does not endorse extermination

Subject:  Beetle identity please
Geographic location of the bug:   Johannesburg South Africa
Date: 01/14/2019
Time: 12:47 PM EDT
Your letter to the bugman:  Hello. This beetle is nesting in an oak tree could you please help identify it?
How you want your letter signed:  Trudi

Flower Chafer: Dicranorrhina derbyana

Dear Trudi,
This beautiful Scarab Beetle is one of the Fruit and Flower Chafers, and adults often feed on foods high in sugar.  We suspect this individual might be feeding on plant sap.  We found a matching image in our archives of  
Dicranorrhina derbyana which we are confident is also your species.

What's That Bug? does not endorse extermination

Subject:  What kind of beetle?
Geographic location of the bug:  Wollongong, NSW, Australia.
Date: 01/10/2019
Time: 06:40 AM EDT
Your letter to the bugman:  Can you please help me identify this kind of beetle, and whether it is good to have in my garden or not?
How you want your letter signed:  Ashley Jarrett

Spotted Flower Chafer

Dear Ashley,
We quickly identified this Scarab Beetle as a Spotted Flower Chafer,
Polystigma punctatum, thanks to the Brisbane Insect site.  iNaturalist refers to the species as the Punctate Flower Chafer, Neorrhina punctatum.  According to Jungle Dragon:  “In a short season they appear in numbers suddenly then equally suddenly they are gone.”  According to Climate Watch:  “Adults are active in the daytime and are often found among the petals of flowers. They are important pollinators of many flowering plants, feeding on nectar and pollen.  Various species of flower chafers often form gregarious, mixed groups particularly on prolific flowering plants.”



What's That Bug? does not endorse extermination

Subject:  Pentodon species identification
Geographic location of the bug:  Žagubica, Serbia.
Date: 12/20/2018
Time: 01:16 PM EDT
Your letter to the bugman:  Thanks to iNaturalist community I found out that the genus of this Coleoptera is Pentodon spp. but I can’t figure out what species it is because all of them look the same to me, and I couldn’t find any keys for this genus online. The specimen was collected in June 2017 (not by me). According this site:
there are only 3 species (and one subspecies) in Serbia, so it’s likely one of them, but again they look practically the same to me. The insect is just under 2 cm. I can try to take additional photos if necessary.
How you want your letter signed:  Regards, Mihajlo

Scarab Beetle

Dear Mihajlo,
We are not familiar with this genus of Scarab Beetles, but since it is in the subfamily Dynastinae, the Rhinoceros Beetles, we suspect this is a female since most males in this subfamily have fantastic horns.  Females present an additional identification challenge as they are often quite similar looking.  Perhaps one of our readers will be able to provide additional information.  We get so few submissions from Serbia.

Scarab Beetle

Thank you for your reply. In the meantime I found out what species it is. Someone from iNaturalist who is also from Serbia said that there is actually only one species in Serbia which is Pentodon idiota.

What's That Bug? does not endorse extermination

Subject:  Beetle
Geographic location of the bug:  San diego
Date: 10/15/2018
Time: 05:00 PM EDT
Your letter to the bugman:  Hi,
A month or two ago these beetles were flying all over the place . Now they are mostly gone but I found this little guy the other day. I’m wondering what he is? I’m guessing fig eater or green June bug but I’m don’t know which and I’d like to know. Is it possible he’s different from the ones that were all over the place a few months ago? I’m trying to draw one and I’d like to label it correctly.  Thanks!
How you want your letter signed:  Natalie


Dear Natalie,
Figeater and Green June Beetle are both acceptable common names for
Cotinis nitida, according to BugGuide.  Since common names are often regional, and might differ from place to place, and since the same common name might be used for different species, your most accurate label would be to use the scientific name.

What's That Bug? does not endorse extermination