Do you have big green caterpillars on your tomato plants? That's a sure sign that your garden is unwilling host to one of the most common tomato pests in North America, the tomato hornworm caterpillar..Identifying caterpillars can be a real challenge, as most of them do not resemble butterflies. Here is a brief overview about some of the most common types of .Description Back to Top .s: Acharia stimuleas are glossy dark brown in color with black shading. Dense scales are present on the body and wings, giving it a furry appearance. Wing span ranges from 26-43 mm 1.0-1.7 in , with females typi.y larger in size than males..Waxworms are the caterpillar larvae of wax moths, which belong to the family Pyralidae snout moths . Two closely related species are commercially bred - the lesser wax moth Achroia grisella and the greater wax moth Galleria mellonella .They belong to the tribe Galleriini in the snout moth subfamily Galleriinae.Another species whose larvae share that name is the Indian mealmoth Plodia .