HETEROPTEROUS HEMIPTERA. 363 



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 Mis- 

 souri. 



3. 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 

 antennae : antennae 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] 



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. 



NAUCORiS Geoff. Latr. 



1. N. PROFUNDA. — Oval, dark greenish, rugulose; inferior 

 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 submarginal line very 

 distinct ; lateral margin depressed : posterior angles obtusely 

 rounded : hemelytra with the covered membrane deep velvet 

 black : tergum dull yellowish with a blackish line on the edge 

 and spots on the margin : beneath blackish fuscous : feet green- 

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

 golden hair. 



Length two-fifths of an inch. 



