EDWARD P. VAN DUZEE. 85 



Helicoptera A. and S., for which latter name there seems to 

 have been no adaquate justification. 



Catonia dimidiata n. sp. 



Allied to impunctata Fitch, but easily distinguished by having the 

 front entirely black, with the clypeus white, and the vertex and pro- 

 notum without the black discal fovae. Head, pronotum, and meso- 

 notum ferruginous-brown becoming light on the disk of the vertex and 

 pronotum, and on the base and apex of the discal area of the meso- 

 notum, the carinae lighter anteriorly; discal areola? of the vertex 

 marked with darker brown. Front black, becoming ferruginous on 

 the rounded apex of the head, margins strongly elevated, not obviously 

 constricted between the eyes ; clypeus white, minutely dotted with 

 brown along the elevated margins ; cheeks black above, white below, 

 the antennal sockets pale. Pronotum dark brown beneath the eye, 

 the carinas and included surface paler, yellowish ; patagiae a little 

 darker. Elytra testaceous brown, a little infuscated on the base of the 

 corium, behind which is a vague whitish cloud ; transverse veinlets 

 and apex of the clavus whitish. Wings smoky with fuscous nervures. 

 Legs whitish with a dusky spot on the base of the hind tibias exteriorly. 

 Abdomen paler at apex and on the edges of the segments in the female ; 

 blackish in the male. Female genitalia substantially as in impunc- 

 tata. In the male the median tooth of the basal valve is short tri- 

 angular, its blunt apex attaining the middle of the plates, the margins 

 either side of the tooth forming a moderate sinus and then retreat- 

 ing to the basal angles. In impunctata this median tooth is long and 

 acute, attaining the apex of the plates, and the margins either side are 

 deflected at right angles, making the basal portion of this valve of 

 nearly equal length across its whole width. Length 6 mm. 



Described from one female taken by me at Phoenicia, 

 N. Y., in August, 1904, and one male and two females taken 

 by Prof. John Barlow at Kingston, R. I. This is the "va- 

 riety " of impunctata noticed by Fitch. In my review of this 

 genus in 1907 I included it as the female of that species, 

 having at that time seen only females of this form and males 

 of the other. The present series from Prof. Barlow, how- 

 ever, shows them to be distinct species. Catonia impunctata 

 has the carinae and a transverse band on the front white, the 

 median areoles of the vertex and pronotum, the deflected 

 sides of the pronotum and the patagiae black, and the chest 

 and legs are immaculate whitish. 



TRANS. AM. ENT. SOC, XXXVI. APRIL, 1910. 



