HETEROPTEROUS HEMIPTERA. 357 



appearance of a double head; the impressed line of the thorax 

 is on the posterior submargin, and the anterior impressed line is 

 very obvious. 



5. R. iNSiDiosus. — Black ; hemelytra pale at base of the 

 corium ; membrane milky-white. 



Inhabits United States. 



Body very small, black, punctured ; antennae whitish, somewhat 

 hairy; bjisal joint blackish; second joint longer than the third; 

 fourth joint as long as the third, a little dilated and compressed :: 

 thorax minutely rugulous transversely and with a slight trans- 

 verse [ 802 ] indentation : scutel transversely rugulous : heme- 

 lytra yellowish-white on the corium at tip of which is a large, 

 triangular, blackish spot ; membrane milky-white : feet whitish j 

 thighs, excepting their tips, black. 



Length more than one-twentieth of an inch. 



This is a very common little species in almost every part of the 

 Union, on flowers. The large triangular black hemelytra spots, 

 are very conspicuous. The antennae are rather short and robust. 

 The lateral edge of the thorax is not interrupted. 



6. R. MUSCULUS. — Black ; hemelytra white, corium and mem- 

 brane blackish at tips ; feet honey-yellow. 



Inhabits North-west Territory. 



Body small, unarmed, black, somewhat polished : antennae 



: thorax a little contracted on the anterior margin, almost 



like a short neck ; on the middle an obtusely impressed, but not 

 profound band, behind which the surface is minutely wrinkled ; 

 posterior margin deeply and obtusely emarginated : scutel rugose 

 towards the depressed tip : hemelytra, whitish, hyaline ; corium 

 with a large blackish spot occupying the posterior half; membrane 

 dusky towards the tip : feet honey-yellow ; tarsi dusky at tip. 



Length to tip of hemelytra over three-twentieths of an inch. 



Resembles the preceding, but it is larger, the head more elon- 

 gated and otherwise very distinct. 



7. R. PECTORALis nob. — New species of N. Amer. Ins. found 

 by J. Barabino. [Ante, p. 306.] A complicated spine beneath 

 the eye and a projecting spine each side of the pectus before. 



