84 



sections of the fifth vein three-fourths the distal section, wings widest at end 

 of fifth vein and there two-fifths the length; cilia as long as the anterior cross- 

 vein, anal angle less projecting than in the other species. 



Holotype. — Lynden, Vermont, June 13, 1914 (Melander). 



Platypalpus flammifer, sp. nov. 



Length 2.2 mm. Black, disk of the thorax shining, antennae elongate, with 

 a white arista, front and face broad and shining; legs more or less testaceous, 

 the posterior coxae, the apical third of the hind femora, the tibiae and the 

 tarsi brownish to black, no tibial spur; cross- veins meeting and nearly trans- 

 verse. Occiput finely cinereous, its hairs sparse, the single vertical and ocellar 

 bristles black, sides of the front diverging above; antennae black, three-jointed, 

 the basal joint minute, the last joint subulate, four times as long as broad and 

 nearly twice as long as the arista; palpi short ovate, brownish, not hairy but 

 with a single apical seta. The narrow sides of the thorax and the upper half 

 of the pleurae cinereous, one pair each of the usual bristles black; abdomen 

 shining, ovipositor pollinose; pygidium obliquely erect, glistening, bare, the 

 lower valve shallowly convex and produced upward. Front femora not 

 ciliate, middle femora with about eight yellow setae behind, their tibiae three- 

 fourths as long as the femora. Veins thin but firm and brown, costa somewhat 

 thickened at the end of the first vein, its second, third and fourth sections 

 proportioned 4: 2.5:1; third vein straight, ending before the tip of the wing, 

 parallel with the fourth vein, cross-veins at three-sevenths the length of the 

 wing; sections of the fifth vein proportioned 0.4: 0.5:1; anal cross- vein at an 

 angle of sixty degrees, anal vein faint, vanishing at the base, marginal cilia 

 short. 



Distribution. — Ithaca, New York (Cornell University Collec- 

 tion) ; Buffalo, New York (M. C. VanDuzee) ; Hartland, Vermont, 

 May, and Hanover, New Hampshire (P. W. Whiting); Green- 

 field, Massachusetts; Lynden, Vermont; and Perma, Montana 

 (Melander). 



Holotype. — Ithaca, New York (Melander Collection). 



Platypalpus harpiger, sp. nov. 



9 . — Length 5 mm. Body black, head and thorax closely gray pollinose, 

 legs including coxae entirely yellow, the tip of the long tibial spur alone black; 

 base of abdominal segments with narrow interrupted pollinose fasciae; antennae 

 yellow, the third joint short; cross-veins separated, the posterior oblique. 

 Front and face with parallel sides, the ground-color of the face yellow; epistome 

 pollinose; one pair each of ocellar and vertical bristles yellow; proboscis black; 

 palpi large, securiform, pale yellow, with a few pre-apical white hairs; antennae 

 entirely yellow, the outer joint triangular, twice as long as deep and two-thirds 

 as long as the black, moderately thick arista. PoUinosity of mesonotum dense, 

 the setulae of the acrostichal and dorso-central rows and the bristles yellow, 

 four scutellar bristles, center of sternopleurae polished; last two segments of 

 the abdomen opaque, the stiles linear. Front femora with about a dozen 

 outstanding flexor yellow hairs; middle femora with twenty-eight black setulae 

 in each of the flexor series and with about six yellow bristles in front toward 

 the knee and about a dozen longer yellow bristles in the posterior row; middle 

 tibiae more than two-thirds the length of the femora. Calypteres, fringe and 

 entire halteres pale yellow. Veins yellowish becoming slightly darker toward 

 the tip, the second, third and fourth sections of the costa proportioned 7: 6:1; 

 third vein gently swinging back and ending a little beyond the tip of the wing, 



