The BugLady thinks it’s a Ragweed Leaf Beetle (Zygogramma suturalis), if not, it’s a Calligrapha bidenticola, the two species are “easily distinguished” by a good look at the tarsal claws and at the color of the folded, ventral edge of the elytra. Both are found from the Great Plains to the Atlantic and both have similar food preferences. There are about 100 species in the genus Zygogramma, but only a dozen or so live north of the Rio Grande.
“Bugs without Bios” are critters that, while undoubtedly worthy, are barely on the radar in either on-line or print references. But, they contribute to their communities and have their own places in the Web of Life. What these three have in common is their (admittedly very limited) work as biological control agents.
As the Bug Season winds down, the BugLady would like to celebrate summer by sharing a baker’s dozen of the pictures she’s taken in the past few months.
Tortoise Beetles belong to the Leaf beetle family Chrysomelidae, a huge 1,700+ species in North America alone. As their names suggest, this is a bunch of plant eaters who are often very attached to a single species or group of plant species.
Checkered Beetles live in a variety of habitats in North America (there are about 3,500 species worldwide). As a group they are small-ish, hairy, long and narrow, and brightly-patterned. CBs can be seen on flowers and in trees. Most species are meat eaters as both larvae and adults—the majority hunt on and under the bark of trees; some sit on flowers or sap flows and prey on visiting insects; still others consume insect eggs and a few are scavengers.
Glowworm Beetles are in the glowworm beetle family Phengodidae, a New World family of about 250 species with representatives living from the southern edge of Canada all the way to Chile. Most species live south of the Rio Grande. Other common names include “glow-worms” (a name shared with larval Lightning beetles) and “railroad worms.”
The Forked Fungus Beetle is in the Darkling beetle family Tenebrionidae and is the only species in its genus. It’s found east of the Mississippi, at night, in the woods, in the company of woody, polypore shelf fungi. All stages of the beetle live and overwinter and reproduce and feed in/on woody shelf fungi.
The BugLady is dusting off and sprucing up a BOTW from six years ago. A clarification: a number of different genera of beetles in various regions of America are also popularly called June bugs/May beetles (and there’s even a conspicuous on-line image of a Japanese beetle, genus Popillia, labeled as a June beetle). Our June bugs, in the genus Phyllophaga, are the real ones.
It’s a large family, with more than 20,000 species worldwide and 1,200 species north of the Rio Grande, and it’s divided into eight subfamilies. Many LongHorns are economically important because their larvae bore into dead/dying/cut wood, lowering its value as timber (but aiding in the recycling of the forest).
Today’s star is a metallic wood boring beetle called (probably) the Flatheaded Poplar Borer (Dicerca tenebrica—unless it’s D. divaricata, the Flatheaded Hardwood Borer). There are about 25 species in the genus, and the tips of their elytra (the hard covers that protect the flying wings) are longish, a tad blunt, and slightly separated or flared at their tips.