Rovartani Közlemények (Folia Entomologica Hungarica 3/3-4. Budapest, 1950)

has a constant morphologic deviation from empiformis whereby it can be distinguished easily and surely. • In the male of hungariea (fig. 1) the wedge-shaped hyaline cell is long and touches almost the base of the wing. The long hyaline cell underneath it reaches or almost readies the middle band. Contrary to this the wedge cell in the male of empiformis (fig. 3) is short and supercedes barely the half distance between base and median band. The longitudinal eell is also short and never longer than above half-distance. This difference can -be observed also in the females. It must be borne in mind however that in the females of the genus Chamaesphecia the longitudinal cell is always shorter than in the males. So it shortens in a female hungariea (fig. 2) approximately to the length in a male empiformis; while in Fig. 1—4. 1—2. — Chamaesphecia hungariea T o m a 1 a. — 3—4. = Chamaesphecia empiformis Es p. a female empiformis (fig. 4) the long cell usually shortens into a yellowish spot or disappears totally. I have to mention also that the bar-shaped middle spot on the hind wing of hungariea stands usually vertically, in empiformis it is in most cases slanted. Veins 3 and 4 bifurcates in hungariea mostly at the middle spot; in empiformis usually only between the middle spot and the margin. But these are inconstant characters. Other differences can be found too in pattern and color, but tliese are also inconstant or can be observed in fresh specimens only; such as the stronger yellowush-golden irroration of the abdomen, especially in the females of hungariea. The ratio of the hyaline cells in the forewings is however, according