320 HETEROPTEROUS HEMIPTERA. 



Inhabits North-west Territory. 



Body dull yellowish, with numerous black, deep punctures ; 

 head with the lateral edge undulated, the tip abruptly nar- 

 rowed, with a narrow, deep fissure : antennae blackish rufous, 

 second joint longer than the third : thorax with the lateral 

 narrow margin and longitudinal line impunctured ; lateral edge 

 rectilinear: scutel rather large, not being much narrowed at 

 tip ; tergum black, punctured, with a yellowish margin : beneath 

 [ 765 ] punctures more dense : venter black, punctured ; with the 

 margin yellow : feet with black points. 



Length about one-fifth of an inch. 



The scutel in its form resembles that of the preceding species, 

 but the brevity of the third joint of the antennae and the undu- 

 lated edge of the head distinguish it. I obtained this species 

 when with Major Long's party in the North. 



18. P. delia. — Rather widest behind the middle ; scutel but 

 little narrowed at tip. 



Inhabits Missouri and Massachusetts. 



Body dull-yellowish green ; ovate, being slightly widest be- 

 hind the middle ; with rather large, profound, black punctures 

 not closely set : head somewhat long ; the obtuse carina impunc- 

 tured : antennae rufous, darker at tip ; second joint much shorter 

 than the third : thorax, lateral edge rectilinear ; lateral margin 

 without black punctures ; anterior angles transversely truncate 

 to receive the eyes, and without any tubercle ; posterior angles 

 not wider than the hemelytra : scutel not much narrowed at tip ; 

 tergum black punctured, margin yellowish : hemelytra, coria- 

 ceous portion rounded at tip : beneath with a series of black 

 points on the margin and another on the edge. 



Length three-tenths of an inch. 



The scutel is not so much narrowed at tip as usual. One was 

 presented to me by Nuttall, and another by Dr. Harris. 



19. P. calceata. — Green, thorax with a band, and yellow 

 spot each side before, enclosing a green dot : tarsi rufous. 



Inhabits United States. 



Above green, densely punctured ; antennae dull sanguineous ; 

 first and second joints green; second and third joints equal; 

 ultimate joint dusky : thorax with a yellow or rufous band be- 



