SUBFAMILY II. — CAPSIN^. 681 



troduced European species known in this country from Nova 

 Scotia, Maine, New York and Victoria, B. C. The macrop- 

 terous form is very rare, both here and in Europe. 



Subfamily II. CAPSIN^E Reuter, 1883, 566. 



Oval, rarely elongate species having, in addition to the char- 

 acters given in the subfamily key, the head short, usually 

 broader across the eyes than long, its front portion more or 

 less declivent ; cheeks not prominent, rarely elevated above 

 the tylus ; pronotum generally subtrapezoidal, rarely without 

 a distinct collar, if so the abdomen constricted at base, disk 

 with calli more or less distinct, the carinae of sides, if present, 

 very fine, not reaching apical angles ; scutellum triangular, 

 broadly exposed ; elytra usually entire, cuneus triangular, its 

 suture distinct ; membrane with two cells ; tibiae generally finely 

 spinose ; first joint of tarsi as in key. 



The subfamily is very large and is represented in our terri- 

 tory by 27 genera. These are distributed among three tribes 

 which are separated as follows: 



KEY TO TRIBES OF SUBFAMILY CAPSIX.E. 



a. Form not ant-like; abdomen not distinctly constricted; side margins 

 of pronotum more or less distinct, frequently finely carinate; costal 

 margins of elytra straight or slightly curved. 

 b. Pronotal collar convex, about as wide as calli; tibiae without spines 

 but sometimes with stiff black hairs ; body opaque, impunctate, 

 usually in part red or yellow; front of head vertical, rarely de- 

 clivent, the cheeks high; osteolar peritreme ill defined, its mar- 

 gins low; joint 1 of hind tarsi twice as long and thicker than 

 joint 2. Tribe I. Resthenini, p. 681. 



bb. Pronotal collar, narrow, convex, never as wide as calli; tibiae 

 with rows of spines, sometimes rather fine; body usually more or 

 less shining, often punctate; front of head usually declivent, the 

 cheeks of medium height or low; osteolar peritreme well defined, 

 its margins elevated; joint 1 of tarsi rarely longer than joint 

 2 or, if so, never thicker than 2. Tribe II. Capsini, p. 689. 



aa. Slender ant-like species; abdomen constricted at base; side margins 

 of pronotum indistinct, more or less sinuate ; elytra coarctate at 

 middle. Tribe III. Myrmecoriini, p. 794. 



Tribe I. RESTHENINI Reuter, 1905, 20, 28. (Horistini Van D.). 



To this tribe, as characterized in the key, belong three gen- 

 era of the subfamily Capsinse, two of which are represented in 

 the eastern states. 



