HETEROPTEROUS HEMIPTERA. 



Much smaller than the preceding, and more slender, of a 

 darker color; abdominal margin of a different color, and the 

 posterior margin of the thorax is broadly depressed. I obtained 

 an individual, and Nuttall gave [me] one which he took in Mia 

 souri. 



8. G-. canaliculatus. — Above brownish ; beneath yellowish, 

 with a pectoral groove extending to the venter. 



Inhabits Georgia. 



Head dark brown, with a silvery line from the eye to the 

 antennas : antennas honey -yellowish and feet of the same color, 

 the tarsi dusky : thorax dull yellowish or dull fulvous, darker 

 each side, with a dorsal dull fulvous line and lateral margin, 

 beneath which is a double black line enclosing a silvery one: 

 hemelytra brown with black nervures : tergum fulvous with a 

 black lateral line and yellowish margin: terminal spines even 

 with the tip of the tail : beneath yellowish fulvous : pectus with 

 an obvious groove, extending to the venter, and in which behind 

 is a blackish line. 



Length less than two-fifths of an inch. [ 808 J 



Differs from marginatus nob. in having an obvious groove be- 

 neath extending to the venter. The whole inferior [surface] also 

 is yellowish, with the usual silvery reflection : the posterior de- 

 pressed margin of the thorax is not so wide as in that species, 

 and has no raised line. 



NAUCOHIS Geoff. Latr. 



1. N. PROFUNDA. — Oval, dark greenish, rugulosc ; in 

 membrane velvet black. 



Inhabits Mexico. 



The whole surface is covered with a minute, confused rough- 

 ness; the form is rather dilated oval: thorax profoundly emar- 

 ginate to receive the head; posterior submaxginal line \«r. 

 distinct; lateral margin depressed: posterior angles obtusely 

 rounded: hemelytra with the covered membranr deep velvet 

 black: tergum dull yellowish with a blackish line hi, the edge 

 and spots on the margin : beneath blackish fuscous: feel 

 ish; anterior pair of thighs dilated, triangular, ciliated with 

 golden hair. 



Length two-fifths of an inch. 



