No. 34-] HEMIPTERA OF CONNECTICUT: HETEROPTERA. 385 



posteriorly not farther than middle of eyes ; membrane with one 

 cell • TERMATOPHYLIDAE, p. 665 



26. Hemielytra without a cuneus, not Mirid-like; size large or small 27 

 Hemielytra with a cuneus ; small Mirid-like forms 



[ISOMETOPIDAE] 



27. Front legs not especially modified for grasping, generally much like 



the others, front femora sometimes thickened and armed with a 

 few teeth; first segment of rostrum generally longer than wide 28 

 Front legs raptorial, the tibiae and usually the femora armed with 

 rows of numerous closely set spines which interlock when the leg 

 is flexed, front femora more or less thickened, the femoral spines 

 sometimes replaced by closely set even setae; first rostral seg- 

 ment short, moderate in size NABIDAE, p. 670 



28. Body and appendages not extremely slender, antennae otherwise 



constructed 29 



Body and appendages extremely slender, linear; antennae genicu- 

 late, biclavate ; eyes distant from base of head ; moderate in size 



NEIDIDAE, p. 737 



29. Membrane with numerous more or less anastomosing veins ; anten- 



nae inserted high, usually above a line drawn from the middle 



of the eye to the anterior end of the buccula 30 



Membrane with five usually simple veins ; antennae inserted low 

 on the side of the head, usually below or on such a line ; moderate 

 or small in size, sometimes brachypterous LYGAEIDAE, p. 708 



30. Metasternal orifices distinct, placed farther outward; colors usually 



dark ; generally over 10 mm. in length 31 



Metasternal orifices generally obsolete, when present placed 

 between intermediate and hind coxae near median line, with two 

 diverging furrows running outwards ; moderate or small in size 



CORIZIDAE, p. 751 



31. Head much narrower and shorter than the pronotum; bucculae 



extending posterior to insertion of antennae; moderate or large 



in size COREIDAE, p. 746 



Head much larger proportionally, the part between the eyes wider 

 than the scutellum; bucculae anterior to insertion of antennae; 

 moderate in size ALYDIDAE, p. 749 



32. Scutellum generally large, covering almost the whole of abdomen, 



usually very convex ; when scutellum is reduced in size and 



flattened, tibiae are strongly spinose 33 



Scutellum generally moderate in size, more or less narrowed 

 apically; scutellum rarely covering most of the abdomen, in 

 which case, in our species, colors are bright and contrasting, or 

 there is a prominent tooth just anterior to lateral angles of pro- 

 notum ; tibiae not strongly spinose but sometimes bear very small 

 spines or a more or less hair-like vestiture which may have a 

 spinose appearance; moderate in size . . .PENTATOMIDAE, p. 753 



33. Tibiae thickly set with long strong dark colored spines; corium 



narrow, acute or rounded apically ; moderate to minute in size . . 



CYDNIDAE, p. 776 

 Tibiae not stronglv spinose ; corium broad, obtuse at apex ; moder- 

 ate in size SCUTELLERIDAE, p. 781 



