492 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Fig. 59. Deraeocoris nitenatus Knight, — male genital claspers, (a) left 

 clasper, lateral aspect, (b) internal arm of left clasper, (c) right clasper, 

 lateral aspect. Greatly enlarged. Drawing by Dr. H. H. Knight. 



Key to Species of Group C. 



1. Dorsum heavily pubescent or hairy, at least with long hairs at 



anterior angles of the pronotum 5 



Dorsum practically glabrous, at most only sparsely and finely 

 pubescent (not rubbed specimens), rarely with a few hairs at 

 anterior angles of pronotum 2 



2. Form broad oval, strongly convex (width greater than or equal to 



at least one-half the length of the insect) (western species) 



Form elongate (width not equal to one-half the length) 3 



3. Antennae (female) with prominent exserted hairs on segment ii, in 



length equal to three times the thickness of segment at middle; 

 male segment ii as thick at the middle as on the apical half, 

 length of exserted hairs equal to one and one-half times the 



thickness of the segment laricicola 



Antennae (female) with exserted hairs, in length scarcely equal to 

 twice the thickness of the segment where they occur; male 

 segment ii slender on the basal half, distinctly thicker on the 

 apical half than at middle, or if not, then the length of exserted 

 hairs not greater than the thickness of the segment 4 



4. Calli margined or lined with black, rarely entirely black, ivory 



white just before and extending inward from the anterior angles 

 in one or two curved lines upon disk of each callus ; male seg- 

 ment ii of antennae nearly as thick at middle as on the apical half, 

 length of exserted hairs scarcely as great as the thickness of the 



segment pinicola 



Calli solid black; segment ii very similar in both sexes, slender on 

 the basal half and gradually becoming thicker toward the apex. 

 Exserted hairs about equal to thickness of the segment; scutel- 

 lum uniformly brownish ; hind tibiae broadly pale on apical half 

 but without a pale indication below the knee appalachianus 



5. (i) Legs uniformly dark sepia brown or blackish, hind tibiae fre- 



quently with a pale annulus on the apical half 6 



Legs and general body coloration fusco-grayish to blackish; hind 

 femora pale on the basal half, two or three linear series of dark 

 spots visible, apical half dark fuscous to blackish but divided by 

 a narrow pale annulation kennicotti 



6. Pronotum, hemelytra and legs uniformly dark sepia brown or 



blackish, the semitranslucent areas stained with brownish; hind 

 tibiae usually distinctly annulated with pale on the apical half . . 



nigritulus 

 Pronotum usually fusco-grayish or black; hemelytra fuscous to 

 black, becoming paler in certain areas but not stained with brown- 

 ish ; legs brownish black, hind tibiae sometimes indistinctly annu- 

 lated with paler on the apical half; front coxae, xyphus, lower 

 margins of propleura, gula, and sides of tylus, pale albigulus 



