AMERICAN DIPTERA. 293 



Type. — &. Hyannisport, Mass., July 4, 1909 (Figs. 12, 

 64, 180, Johnson, B. S. N. H.). 



Paratypes. — Auburndale, Mass. (1 6 71 , Fig. 66, Johnson, 

 B. S. N. H.)\ Delaware Water Gap, Pa. (1 d\ coll. Johnson); 

 Glencarlyn, Va. (19, Fig. 65, coll. Banks). Taken in June 

 and July. 



The specimen from Auburndale shows little variation in 

 the extent of the cinereous and brown abdominal markings, 

 sometimes the former extending entirely along the apical 

 margin in some aspects, while in others broadly interrupted ; 

 the general appearance of the abdomen is more shining ; 

 hypopygium more extended and the cleft very wide (Fig. 

 66); antennae brown or blackish, white pilose. The speci- 

 men from the Delaware Water Gap has the cinereous ab- 

 dominal apical margins broadly interrupted ; post-femora 

 and tibiae more robust ; anterior cross-vein not so far basad 

 the discal cell. There is a c? from Manchester, Vt., June 

 8, 1910 (Johnson) , which may be a distinct species, having 

 antennae entirely black ; lateral margins of mesonotum brown 

 but of lighter color than the middle ; pleurae and metanotum 

 less cinereous. Abdomen nearly entirely black or brown, 

 subopake, with lateral apical margins of segments lighter 

 brown, hardly cinereous ; hypopygium much extended, cleft 

 very wide, so that the terminal lobe is scarcely visible. 

 Otherwise similar to the type. 



The females of this species are similar to those of atlanti- 

 cus, but the antennae are long acuminate. 



15. P. minor n. sp. 



cf. Front and face silvery; occiput cinereous. Proboscis yellow; 

 third antennal joint yellow, long acuminate (Fig. 28). Mesonotum 

 subopake, brownish medianly ; laterally pleura? and metanotum cinere- 

 ous. Scutellum more shining, black ; humeri and halteres yellow. Ab- 

 domen subopake, brownish pollinose ; apical margin of first and lateral 

 angles of following segments dark grayish, leaving the brown portion 

 of each with a convex posterior margin. Hypopygium little developed 

 (Fig. 90), not noticeably compressed laterally, cleft, shining and 

 faintly brownish-cinereous ; all the lobes quite distinct, the ventral one 

 yellow ; ventral segments yellowish with distinct yellow longitudinal 

 lineations (these markings are due to the shrinking of the ventral 

 membrane). Legs yellow, coxae, narrow femoral ring and apices of 



TRANS. AM. ENT. SOC.XXXVI. JANUARY, 1911 



