SUBFAMILY I. — PENTATOMIN^E. 129 



Brazil, is listed by Uhler (1886, 6) as occurring in the "South- 

 ern States," but no definite locality record is known. 



IX.- Euschistus Dallas, 1851, 201. 



Broadly oval species of medium size having the body sub- 

 depressed above, convex beneath ; head porrect, longer than 

 wide ; cheeks sinuate near base, usually equalling, rarely ex- 

 ceeding the tip of tylus ; antennae slender, half the length of 

 body, first joint shortest and stoutest, third usually the longest, 

 fourth and fifth subequal ; beak reaching or slightly surpassing 

 middle of hind coxae, second joint almost as long as third and 

 fourth united ; pronotum with front portion strongly declivent, 

 its side margins usually more or less concave, carinate and cren- 

 ulate, humeral angles variable as to species ; scutellum shorter 

 than corium, frena reaching nearly to its tip which is nar- 

 rowly rounded ; membrane with simple longitudinal veins ; con- 

 nexivum usually narrowly exposed ; ventral segments with 

 outer posterior angles slightly prolonged ; osteole with a very 

 short bluntly rounded canal ; tarsi grooved above throughout 

 their length. 



The members of this genus are the "stink-bugs" par excel- 

 lence, some of the species being familiar to everyone who lives 

 in or visits the country. Several of them often occur on shrubs 

 or vines in the heart of the larger cities. More than 60 species 

 have been described, 18 of which are known from North 

 America, ten of these occurring in the eastern states. 



KEY TO EASTERN SPECIES OP EUSCHISTUS. 



a. Spines of humeral angles, when present, not projecting upwards 

 and forwards; ventral surface not strongly convex; membrane 

 of elytra without convex oblong dark spots between its veins. 

 b. Pronotum without an irregular smooth yellowish line between the 

 humeral angles. 

 c. Ends of ventral segments with a black point or dot on each front 

 angle. 

 d. Middle of abdomen without black spots. 

 e. Side margins of pronotum distinctly sinuate or concave, the 

 pale edge not bordered within by a line of blackish punctures ; 

 hind margin of genital segment of male entire, ;1 broadly 

 curved or subtruncate; length 12 or more mm. 

 /. Disks of pronotum, scutellum and elytra distinctly and more 

 or less regularly punctate. 



31 The male of subimpunctatus is not known. 



