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

Subject: What’s that bug?
Location: San Diego
September 18, 2016 5:49 pm
We found this insect in our house on the coast in San Diego California during the month of September. Based on the pictures on your site, it looks like the red shouldered pine borer or a blister beetle? We cannot tell. Please help!
Thanks!
Signature: sandy vissman

Red Shouldered Bug

Red Shouldered Bug

Hi Sandy,
This is a Red Shouldered Bug,
Jadera haematoloma, a species that frequently forms large aggregations around homes and gardens.  Though it can be a nuisance when it appears in large numbers, it is considered a benign species.

What's That Bug? does not endorse extermination

Subject: Bug Identification, Philadelphia
Location: Philadelphia, PA, (Aspen & 23rd Sts)
August 31, 2016 8:13 am
Hi Bugman,
These bugs are all over the ground under trees and shrubs in our Philadelphia neighborhood. None of us have ever noticed them before but now they’re profuse under the shrubbery and trees surrounding a block-size parking lot. They look like they’re mating (picture 1) but I’ve also seen signles. And there are tiny versions (picutre 2).
Thanks for solving our mystery. We’re all stumped!
Merrill Mason
Fairmount neighborhood, Philadelphia
Photos taken at 6pm, August 30, 2016
Signature: Merrill Mason

Mating Red Shouldered Bugs

Mating Red Shouldered Bugs

Dear Merrill,
Your images are an excellent documentation of both adult mating Red Shouldered Bugs,
Jadera haematoloma, and an immature, wingless nymph.  This is a species known for gathering in large aggregations.  According to BugGuide:  “Adults and larvae tend to feed in groups, and favor developing seeds and fruits of their favored hosts, but will also suck sap from foliage, flowers, buds, or oozing stems. They feed on a variety of plants primarily in and related to the family Sapindaceae. Favorites include Balloonvine (Cardiospermum species) and Goldenrain Tree (Koelreuteria sp.), both in Sapindaceae, and they regularly use Soapberry (Sapindus sp.; Sapindaceae) and Maple/Boxelder (Acer sp.; Aceraceae). Additionally, reported on a variety of other plants, especially feeding on fruit, including Chinaberry (Melia azedarach; Meliaceae), Fig (Ficus spp.; Moraceae), Althaea (Malvaceae), Plum, Cherry, & Peach (Prunus sp.; Rosaceae), Apple (Malus sp.; Rosaceae), Grape (Vitis sp.; Vitaceae), Ash (Fraxinus sp.; Oleaceae), etc. Adults sometimes gather around human food leftovers and other smashed insects to feed as well.”  Because of the preferred host tree, they are sometimes called Goldenrain Tree Bugs.

Red Shouldered Bug Nymph

Red Shouldered Bug Nymph

What's That Bug? does not endorse extermination

Subject: Red and purple beetle
Location: SE Michigan
June 25, 2016 4:48 pm
Hi bugman!
I just noticed thousands of these guys hanging out in my backyard mostly around decorative grass and dry whirlybirds. They vary in size and amount of yellow and seem to like to clump together.
Signature: Lisa M

Boxelder Bug Nymphs

Boxelder Bug Nymphs

Dear Lisa M,
These are immature Eastern Boxelder Bugs,
Boisea trivittata.  Adults are winged.  Both adults and nymphs form large aggregations leading to popular names like Democrat Bugs or Populist Bugs.  According to BugGuide they feed on the seeds of the following trees:  “Acer grandidentatum (Bigtooth Maple), A. negundo (Boxelder), A. saccharinum (Silver Maple), A. buergerianum (Trident Maple), and Sapindus saponaria (Soapberry).”  You must have a nearby maple tree.  Boxelder Bugs do not harm the trees and they are not dangerous, but they can be a nuisance if they are too plentiful.

What's That Bug? does not endorse extermination

Subject: Red beetle
Location: Shenandoah Valley, Virginia
June 14, 2016 7:52 am
I think these are the babies of a black and red beetle. They have swarmed my echinacea!
Thanks for helping to identify.
Signature: Kristen

Democrat Bugs

Democrat Bugs

Dear Kristen,
These are immature Eastern Boxelder Bug nymphs, not beetles.  They are sometimes called Democrat Bugs because they aggregate in large numbers.

What's That Bug? does not endorse extermination

Subject: Mystery bug ID
Location: SW Washington, Pacific County
May 26, 2016 1:57 am
These bugs showed up in our area last year for the first time. It has been suggested that they are box elder bugs, but they do not look like photos of box elder bugs. Can you help ID them?
Signature: valleygirl

Mating Bordered Plant Bugs

Mating Bordered Plant Bugs

Dear valleygirl,
These are Bordered Plant Bugs in the genus
Largus, and considering your location, we are relatively confident they are Largus cinctus, a west coast species.  You may refer to BugGuide for additional images of Bordered Plant Bugs.

What's That Bug? does not endorse extermination

Subject: Box Elder Bug Love
Location: Monmouth County, NJ
May 22, 2016 8:46 pm
At first I thought these were beetles, but after a bit of google research I have come to think they are Box Elder Bugs. I found them like this on my window screen (mating?) where they stayed for 2-3 days with little movement.
I was unable to get a photo of the top side (or even see it), but I spotted another one about a week later and after viewing its top side it appeared to be a box elder bug.
Location: Monmouth County, NJ
Time: Around the last week of April
Signature: Anonymous

Mating Boxelder Bugs

Mating Boxelder Bugs

Dear Anonymous,
A ventral view is not ideal for an exact identification, but the red eyes that are clearly visible on the pair in your image and in this BugGuide image are a very strong indication that they are mating Boxelder Bugs.

What's That Bug? does not endorse extermination