302 E. T. CRESSON, JR. 



Scutellum more shining, cinereous at base. Humeri and halteres 

 yellow. Abdomen shining, except first and lateral angles of following 

 segments cinereous; fifth segment longer than fourth, with two dorsal 

 indentations. Hypopygium subopake, entirely faintly cinereous, well 

 developed (Figs. 84-85), extending to apex of fourth ventral segment, 

 strongly compressed to right, with distinct cleft and a strong vertical 

 keel at apex ; intermediate and ventral lobes small, black. Legs 

 black, trochanters, bases and apices of femora, all tibiae, except more 

 or less distinct median rings, especially posterior pair, bases of tarsi 

 and pulvilli, yellow. All femora slender and post-tibia? slightly bent. 

 Wings strongly brownish tinged (Fig. 142). Length, 4.4-5.0 mm. ; 

 wings, 5.0-5.7 mm. 



Type.— Burlington, Vt., June 24, '06 (Fig. 142, Johnson, 

 B. S. N. H.); 



Paratype. — One specimen from Mt. Graybeard, N. C, May 

 (Figs. 8, 84, 85, 143, coll. Banks). 



These specimens, in general appearance, resemble one 

 from Lehigh Gap which I have placed under hisais Lw., but 

 this has the lateral margins of mesonotum cinereous ; abdo- 

 men showing no sign of opake fasciae ; femora much more 

 slender, with post-tibiae hardly bent, and all tibiae darker ; 

 the wings more intensely brown. On comparision it is at 

 once seen that the two are distinct. From general appear- 

 ance one might be lead to suppose this to be the male of 

 horvathi, Kert. The paratype differs somewhat in the 

 proportion of the stigma and following section (Fig. 143), 

 but otherwise seems to be indentical. 



24^ P. femoratus n. sp. 



cT. Antennas, proboscis, palpi, humeri, halteres and legs yellow. 

 Front, occiput, and face white; antennas conically acute (Fig. 10); 

 arista black. Thorax subopake, naked. Mesonotum yellowish-brown 

 pollinose medianly, with margins, pleurae and metanotum cinereous; 

 a shining area on mesopleurae. Scutellum shining. Abdomen sub- 

 cylindrical, as long as head and thorax together ; segments 1-4 sub- 

 equal, fifth longer, quadrate, with two dorsal indentations ; very spar- 

 ingly short pilose or naked ; shining, except first and lateral angles of 

 following, cinereous, which color extends obliquely mesad on dorsum 

 i if segments 2-4, margining opake-black lateral spots at the bases of 

 these segments; this design becoming more obsolete on each succeed- 

 ing segment; a narrow median shining line is distinguished where this 

 design tends to coalese on 'dorsum. Hypopygium less shining, faintly 

 cinereous, well developed (Fig. 92), extending to apex of third ventral 



