NO. 1934. NEW AMERICAN PIPVNCVLID.^—MALLOCH. 297 



length, reaching to apex of second segment, as long as its globose 

 base; legs black, trochanters, bases and extreme apices of femora, 

 bases of tibiae, and tarsi yellow, remainder of tarsi brown, all legs 

 distinctly gray pollinose, especially the femora posteriorly, mid 

 femora with distinct white hairs posteriorly, femoral bristles short 

 but distinct, all tibiae and tarsi with distinct, pale, strong hairs, hind 

 tibiae with a slight bend, thickened on apical two-thirds, three very 

 distinct, long, pale, serial bristle-like hairs on antero-dorsal surface 

 at middle; wings clear, stigma brown, the small cross vein at slightly 

 beyond end of auxiliary vein and at two-fifths from base of discal cell, 

 third and fourth costal divisions of nearly equal length, outer cross 

 vein at nearly its own length from end of fifth vein ; hal teres brown. 



Length, 2^ mm. 



One female, Mount Washington, New Hampshire (Mrs. Slosson). 



Type.—Cat. No. 14808, U.S.N.M. 



Easily known by the hind tibial bristles from any other specie's. 



PIPUNCULUS TROCHANTERATUS, new species. 



Male. — Eyes touching for a short space, less than half the length 

 of frons, frons silvered, face silvered, as wide as frons at above 

 antennae, parallel-sided, antennae black, paler and rather whitish 

 toward tip of third joint, third joint acuminate, more than twice as 

 long as broad at broadest part, arista swollen at base, glossy brown, 

 occiput black above, slightly silvered on lower portion; thorax shining, 

 with two rows of weak hairs on disk, humeri whitish yellow, with 

 several long hairs, pleurae slightly gray pollinose, a rather distinct 

 gray pollinose patch on lateral margin of thorax anterior to base of 

 wing, scutellum shining, nearly bare; post-no tum very distinctly 

 gray pollinose laterally; abdomen black with a slight bronze tinge, 

 subshining, first segment very short dorsally, lateral margins whitish, 

 the lateral comb consisting of long pale hairs, fifth segment slightly 

 gray pollinose laterally, last two segments with scattered hairs, those 

 on the fifth rather numerous and strong, hypopygium in type speci- 

 men exserted and contorted so that it is impossible to state what its 

 normal appearance is, but it is entirely black and devoid of long hairs ; 

 legs black, extreme apices of femora, bases of tibiae and tarsi yellow, 

 last joint of tarsi brown, hind trochanter with a distinct tubercule 

 on the postero-ventral surface, the femora with 2-3 weak bristles at 

 base, fore and mid femora normal, hind femora much thickened 

 on apical half, with a few hairs on antero-ventral surface, hind tibiae 

 bent, thickened ventrally at middle, then distinctly hollowed ven- 

 trally before apex, pubescent on ventral surface at near tip, hind 

 metatarsi thickened ; wings clear, third section of costa less than one- 

 third the length of fourth, small cross vein at slightly beyond end of 



