666 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



cuneus. The male has a single asymmetrical genital plate; the 

 female a narrow median plate with larger triangular ones on each 

 side. 



Key to Subfamilies. 



Third and fourth antennal segments slender, linear, with long hairs 



Lyctocorinae 

 Third and fourth segments fusiform, with short hairs . . Anthocorinae 



Subfamily Lyctocorinae. 



One genus is represented in the New England material at hand, 

 but several others will probably be found to occur here and are 

 included in the generic key. The species of this group are com- 

 paratively rare, and being inconspicuous in appearance and retiring 

 in habits, they are easily overlooked. 



Key to Genera. 



1. Channel of metasternal orifices curved forward, or backward, with 



rounded angle, fine carina lacking 2 



Channel of metasternal orifices nearly straight, joining at a sharp 

 right angle a very fine carina which extends to anterior pleural 

 margin Lyctocoris 



2. Channel curved forward; pronotal margins not distinctly ciliate 3 

 Channel curved backward toward apex; pronotal margins ciliate 



Lasiochilus 



3. Channel long, curved at middle, and almost or quite reaching margin 



of metapleura Xylocoris 



Channel shorter, curved near apex, not nearly reaching margin of 

 metapleura Asthenidea 



Xylocoris Dufour. 



Small shining species, having the lateral pronotal margins 

 straight; apical collar very slightly developed; apex of abdomen 

 with long setae ; orificial channel curved forward from middle, 

 extending almost or quite to anterior margin of metapleura ; front 

 femora somewhat incrassate, unarmed. A single dimorphic 

 species occurs within our limits. 

 X. cursitans (Fallen). 



Mon. Cimic, Suec, 74, 1807. 



Brownish black, shining; antennae piceous; rostrum, tibiae and 

 tarsi yellowish or reddish brown; hemielytra, in the long-winged 

 form, yellowish brown, clavus interiorly and lateral margins 

 darker and more shining ; membrane white ; in the short- winged, 

 uniform yellowish brown. Hemielytra, in long-winged form, 

 extending to apex of abdomen, in short-winged, extending at most 

 to base of fourth abdominal segment. Length 2.25-2.5 mm. 



New Haven, 24 Nov., 1910 (A. B, C.) ; North Haven, 20 Sept., 1918 

 (M. P. Z.) ; Woodmont, 6 Sept., 1910 (B. H. W.). 



