75 8 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



regular; lateral angles oblique anteriorly. Length 13-17 mm. 

 Rare. 



Rainbc , 7 May, 1914 (M. P. Z.). 



Tribe PENTATOMINI. 



This extensive tribe includes a large majority of our Pentatomid 

 species. In this group the scutellum is moderate in size, head not 

 widely explanate, juga without lateral tooth, abdomen not sulcate 

 at base, and the rostrum does not extend beyond the hind coxae; 

 otherwise the species present a wide diversity in structure and 

 facies. The members of this tribe are vegetable feeders, occa- 

 sionally becoming injurious to cultivated plants, but their tastes 

 are varied and few if any confine themselves to a single food-plant. 



Key to Genera. 



1. Head very convex above, triangular, almost as broad as scutellum; 



juga distinctly longer than tylus ; apex of corium broadly rounded 



Neottiglossa, p. 765 

 Head more nearly flat above, narrower; juga often not longer than 

 tylus ; apex of corium with a distinct, but sometimes rounded, 

 angle; if juga are longer than tylus, or apex of corium is broadly 

 rounded, head is not more than two-thirds width of scutellum 2 



2. Base of abdomen unarmed 3 



Base of abdomen armed below with a median spine or tubercle, 



directed anteriorly 15 



3. Lateral margins of juga not or narrowly reflexed, not greatly 



thickened 4 



Lateral margins of juga widely reflexed and greatly thickened . . . 



Murgantia, p. 766 



4. Scutellum generally narrowed at apex, lateral margins concave; 



head not or slightly bent downwards 5 



Scutellum broad and rounded at apex, lateral margins almost 

 straight ; head strongly bent downwards Cosmopepla, p. 765 



5. Metasternal orifices without sulcus or with sulcus which ends 



abruptly • ° 



Orifices with a gradually tapering prolongation 14 



6. Veins of membrane irregularly anastomosing or with numerous 



branches more or less distinct 7 



Veins simple or slightly branched ; • • 9 



7. Scutellum narrowed at apex, shorter than the corium; apical 



margin straight, apical lateral angle acute • • • 8 



Scutellum broadly rounded at apex, as long as corium; apical 



margin of corium rounded, apical lateral angle obtuse 



Coenus, p. 704 

 8 Frena extending just to middle of scutellum; lateral margin of 



pronotum not explanate Hymenarcys, p. 764 



Frena extending beyond middle of scutellum; pronotal margins 



explanate Menecles, p. 765 



o. Frena extending beyond middle of scutellum • 10 



Frena shorter Tnchopepla, p. 759 



10. Tibiae distinctly and broadly sulcate throughout their length n 



Tibiae not so sulcate • ; ; I3 



11. Lateral margins of pronotum not crenulate; lateral angles not 



prominent 



