250 ACADEMY OF NATURAL SCIENCES 



liemelytra, membranaceous tip with a longitudinal reddisli-brown 

 line. 



Length more than nine-twentieths of an inch. [328] 



Observed to be not uncommon in Missouri, as well as in Penn- 

 sylvania. 



2. R. spissiPES. — Thorax and hemelytra light reddish-brown, 

 edged behind with white ; venter black, incisures whitish ; feet 

 thick. 



Inhabits Arkansa. 



Head black, posterior lobe with two tubercles : thorax light 

 reddish-brown; anterior lobe with dilated, black, oblique, or 

 arcuated lines, of which some are confluent; posterior lobe hardly 

 more elevated than the preceding, with a black posterior submar- 

 gin and a white posterior margin : scutel black, margined with 

 white, and tipped by a few hairs : hemelytra, coriaceous portion 

 light reddish-brown, with a narrow whitish posterior margin, 

 membranaceous portion black or dark fuscous : feet thickened, 

 black, hairy : coxas bright red : abdomen black, margin and band 

 on each segment, white. 



Length thirteen-twentieths of an inch. 



The feet resembles those of R. crassijies Fabr., but it is a 

 very distinct species. 



CORIXA Geoff. 



1. C. INTERRUPTA. — With black and yellowish transverse 

 liueations; feet pale ; face pale green. 



Inhabits Missouri. 



Head pale green : eyes large, triangular, reddish-brown : tho- 

 rax transversely lineated with about twenty-two blackish and 

 pale yellowish, equal, [329] alternate lines: hemelytra rounded 

 at tip, with alternate, numerous, abbreviated, transverse, black- 

 ish, and interrupted, pale yellowish lines; lines near the tip 

 much undulated and irregular ; margin with about four obsolete 

 blackish spots, which appear to be still more faintly prolonged 

 into fasciae : epipleura pale, destitute of the transverse lines, but 

 the obsolete spots are visible upon it; edge blackish : wings 

 white : feet pale : tergum black, margin pale : pectus and post- 

 pectus testaceous ; a large black spot between the anterior pairs 

 of feet. 



[Vol. IV. 



