356 HETEROPTEROUS HEMIPTERA. 



ous : hemelytra with a rufous corium : abdomen sanguineous, 

 with large marginal quadrate black spots above and beneath and 

 dilated lateral black ventral vittae : coxae sanguineous : not re- 

 markably distinguished. 



Length about two-fifths of an inch. 



The feet are not remarkably dilated as in crassipes F. : the 

 species is also described to have " elytra fusca basi parum rufa " 

 " corpus nigrum pectore utrinque punctis, abdomine margine 

 rubris" "pedes incrassati," &c. I owe it to the kindness of 

 Nuttall. 



3. R. actjminatus. Yellow, dusky along the middle; head 

 vesicular behind ; hairy. 



Inhabits Indiana. [801] 



Body honey-yellow, very hairy : head short, almost rounded, 

 sub-equally divided by a deeply indented line behind the eyes ; 

 posterior lobe vesicular, somewhat inflated, short ; antennae fus- 

 cous, pale at base : rostrum, basal joint longer than the second 

 and third together : thorax subequally divided by a deeply in- 

 dented line ; anterior lobe somewhat longer, deeply divided by a 

 longitudinal line ; posterior portion with an indented line before, 

 and a blackish disk : scutel with three elevated lines and termi- 

 minating in an acuminated spine ; hemelytra dusky along the 

 middle ; anterior tibiae a litle dilated at tip : beneath with a broad, 

 piceous vitta each side and a carinate line along the middle. 



Length one fifth of an inch. 



When alarmed, the basal joint of the antennae, which is nearly 

 as long as the head and thorax, is thrown backward, and the 

 second joint deflected. It is common. 



4. R. biceps. — Yellowish; hemelytra whitish : head bilobate. 

 Inhabits Pennsylvania. 



Body a little hairy : head elongated ; profoundly impressed 

 behind the eyes, bilobate : rostrum robust : second joint longest : 

 antennae second and third joints equal, fourth hardly shorter, 

 and no less robust; basal joint shorter: thorax with two trans- 

 verse impressed lines and a slightly indented longitudinal one : 

 hemelytra and wings whitish; anterior feet somewhat robust; 

 their tibiae gradually dilated to the tip. 



Length to tip of hemelytra over one-tenth of an inch. 



The impressed line of the head is remarkably deep, giving the 



