Chrysochroma nigricornis Loew.
This is a common species in southern Ohio. Specimens may be found resting on the upper side of leaves and are easily approached. In the female the white fronted line which Loew mentions is very conspicuous and extends from one eye to the other above the antennae. In some specimens the white lateral, thoracic lines are very easily seen, but in others these lines are brownish. The male has much the appearance of the female, the eyes are broadly contiguous, leaving a small vertical triangle which is largely occupied by the ocelli; the lateral thoracic lines in this sex are dark brown and therefore are not such a contrast to the bright green thorax as in the female.
I had some trouble in locating the genus of this species by Dr. Williston’s key. The species is not elongate, but of much the same form as Microcrysa polita. A comparison was made with the type.