728 FAMILY VIII. GRYLLIlhB. THE CRICKETS. 



Subfamily VII. TRIGONIDIIN-S. 

 THE WINGED BUSH CRICKETS. 



Very small crickets of a pale brown, rarely blackish hue, hav- 

 ing the body short, stout; head large, subquadrate, as wide or 

 wider than pronotum ; antennae very slender, three or more times 

 as long as body ; eyes rather large, subglobose or oblong-oval, 

 separated by twice or more their own width ; pronotum subquad- 

 rate, flat or feebly convex above, without carinse, its front and 

 hind margins subtruncate; tegmiua of male as long as or longer 

 than abdomen, usually furnished with a prominent rhomboidal 

 tympanum which is not divided and has only one long curved 

 oblique vein ; tegmina of female more narrow, usually slightly 

 shorter than abdomen, the longitudinal veins straight, prominent, 

 usually connected by numerous alternating cross veinlets ; wings 

 when present often much longer than tegmiua ; fore and middle 

 legs slender, subequal ; hind femora stout, unarmed beneath ; hind 

 tibiae no longer than femora armed above with three pairs of 

 long movable spines and also near apex with two long inner spurs 

 and three very short outer ones; tarsi slender, the basal joint 

 longer than the other two united; second short, cordiform, de- 

 pressed, third very slender; subgenital plate of male conical or 

 scoop-shaped ; cerci short, very slender ; ovipositor sabre-like, much 

 shorter than hind femora, compressed, strongly curved, acutely 

 pointed. 



But little has been written of the habits of these little crickets. 

 The species are all hygrophilous in habitat, living for the most 

 part on the foliage and stems of tall grasses and weeds and low 

 shrubs along the margins of ponds, lakes ditches and streams. 

 None of them are ever numerous enough to do much damage, the 

 plants on which they dwell being of little, if any economic value. 



Four genera represent the subfamily in our territory. The 

 literature pertaining to them is scant in quantity and widely 

 scattered, the following being the most important : Uhler, 1864 ; 

 Saussure, 1874, 3G1, 1878, 598; Blatchley, 1003; Rehu, 1903f; 

 R. & H., 1912c, 1910, 300 ; Hebard, 1915b. 



KEY TO EASTERN GENERA OF TRIGONIDIIN^E. 



a. Last joint of maxillary palpi club-shaped; basal joint of antennae 

 wider than long; pronotum subquadrate, as wide as or wider than 

 long; color never red and dark brown. 



b. Interocular area convex, vertex strongly declivent; eyes subrotund, 

 deeper than long; color in life dull yellow or pale to dusky 

 brown. 



