MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID.E. 437 



Aiitenuie inserted on a slight frontal prominence; in <? 12-jointed, tiie 

 pedicel always much larger and stouter than the first funiclar joint, 

 the first funiclar joint only a little longer than wide, the 3 or 4 term- 

 inal joints enlarged, forming a club; in S 14-jointed, filiform-moniliform, 

 finely pubescent, the first and second funiclar joints elongated, about 

 equal or the second very slightly the shorter. 



Maxillary palpi (?). 



Mandibles short, bifid. 



Thorax ovoid, the prothorax short, woolly ; mesonotum smooth, with- 

 out furrows; scutellum subconvex, rounded behind, without a trace of 

 the lateral impressed lines or a fovea at base ; metathorax short, woolly. 



Front wings pubescent, strongly ciliated, the submarginal vein 

 terminating in a punctiform maiginal vein at about one-third the length 

 of the wing; no other veins; occasionally apterous. 



Abdomen oval, slightly pointed at tip, the petiole short, woolly, the 

 second segment occupying most of the surface, the following segments 

 very short. 



Legs clavate, pilose or pubescent, the basal joint of i)osterior tarsi 

 twice as long as the sectmd. 



This genus is readily distinguished from all other genera in the 

 Diapriinw, except Monelata Forster, by the non-foveated scutellum, and 

 fi'om Monelata, which also has no fovea at the base of the scutellum, 

 by having 12-jointed, not 13-jointed, antennse. 



The species are all very snuill, and evidently parasitic on Muscid 

 larva?, P. hmnatobia', having been reared by Dr. Riley from the Horn- 

 fly, Hwmatohia serrata. 



Our species may be distinguished by the aid of the following table: 



TABLE OF SPECIES. 



FEMALES. 



Wingless forms 3 



Winged. 



AnteuniB witli a 4-jointed club 2 



Antenna; with a 3-jointed club, the last joint of which is enlarged, ovate. 



Antennae black or brown-black,funiclarjointsniouiliform,not longer than thick. 

 Legs rufous, the coxse, femora, and tibiie fuscous.. P. minutissima, sp. nov. 



Legs entirely reddish-yellow P. h^ematobi.e, sp. nov. 



AntenuiB reddish-yellow, the club black. 



Legs reddish-yellow P. virginica, sp. nov. 



2. Club black or fuscous. 



Legs yellow or reddish-yellow. 



All the funiclar joints at least twice as long as thick.. .P. Schwarzii, sp. nov. 



3. Antenuic black or brown-black, gradually incrassated. 



Legs rufo-piceous, the trochanters, base of tibia;, and tarsi pale. 



Abdomen long-oval, 2^ times as wide as the thorax P. aptera, sp. nov. 



Antenme reddish-yellow, with a distinct 4-jointed black club. 

 Legs reddish-yellow. 



Abdomen long-oval, only twice as wide as the thorax P. affinis, sp. nov. 



