314 HETEROPTEROUS HEMIPTERA. 



an inhabitant or South America. I received this species from 

 Mr. Oemler of Savannah, as an inhabitant of Georgia. 



The basal joint of the antennae is oblong-oval and the third 

 joint is rather longer than the second. 



4. P. TRISTIGMA — Venter with a series of three or four black 

 dots, the posterior one largest. 



Inhabits United States. [759] 



Above pale yellowish-olive or whitish-olivaceous, with dense 

 blackish punctures and a few small, irregular, scattered, impunc- 

 tured spots : posterior portion of the eye beneath whitish : an- 

 tennae rufous: fourth and fifth joints brown, excepting the base 

 of the fourth ; second joint considerably shorter than the third : 

 a black line from the base of the antennse to the eye : thorax 

 with the lateral angles rather prominent, angulated but not spini- 

 form ; lateral edge whitish and concavely arquated : blue-black, 

 on the lateral margin with a pale dot on the middle of each seg- 

 ment : beneath yellow, with reddish points, with a black spot on 

 the middle of each of the three or four posterior segments, the 

 posterior one largest and oval : feet pale, with black points ; a 

 black point at the termination of each incisure. 



Length seven-twentieths of an inch. 



Female, with a black line on the middle of the one or two pos- 

 terior segments of the venter. 



Length nearly two-fifths of an inch. 



This species is not rare. It resembles P. 2>itnctijx's nob., Jour. 

 Acad. Nat. Sci. vol. 4, p. 314, which is so common on thistles, 

 &c., but is smaller and is distinguished by the ventral spots, and 

 black points on the lateral edge of the venter. 



5. P. SERVA. — Above pale dull yellowish, with dense black 

 jjunctures : head with a black edge ; a black line from the base 

 of the antennae to the eye : eye on the posterior portion whitish : 

 antennae yellowish, dusky at tip, second joint hardly shorter than 

 the third : thorax, lateral edge granulated and concavely ar- 

 quated ; lateral angles prominent but rounded : scutel whitish on 

 the posterior edge : tergum blue-black, with yellowish spots on 

 the margins: beneath yellow, with a black point at the lateral tip 

 of each incisure : feet with black points. 



Length one-half an inch. 

 Inhabits United States. 



