NO. 1945. A^^TF DIPTEROUS INSECTS—MALLOCH. 655 



with lateral white pollinose spots low down, basal fringe sparse, 

 black, ovipositor long and acute (see fig. 4), brown at base, yellow on 

 acuminate portion, haii's on base yellow. Legs yellow, fore coxae 

 black, hind pairs brownish, last tarsal joint on all legs brown, fore 

 and inid femora on posterior surfaces and hind femora on anterior 

 surfaces white pollinose, all tibiee white pollinose on dorsal surfaces ; 

 all femora with double row of short black thorns on apical half of 

 ventral surface, hind pair thickened and wdth sparse pale pubescence 

 posteriorly; all tibiae with double row of dorsal and rather irregular 

 anterior and posterior rows of very short black thorns; hind tibiae 

 thickened and bent, apical joints of all tarsi with several long black 

 hairs, basal joint of hind tarsus thickened, pulvulli verj large, 

 yellow. Wings clear, stigma fuscous, not reaching to end of auxiliary 

 vein, second and third costal divisions subequal, inner cross vein 

 below end of auxiliary vein and at slightly before end of basal third 

 of discal cell, outer cross vein at its own length from end of fifth 

 vein. Halteres j^ellow. 



Length. — 3^ mm. 



Type.— Cat. No. 15272, U.S.N.M. 



One female, Plummers Island, Maryland, October 5, 1912 (J. R. 

 Malloch). 



AlUed to atlanticus Hough and Jwugliii Kertesz, from which the 

 elongate antennae easily separates it. The ver}^ pale antennae and 

 legs and the large head are characters which distinguish this from 

 any described American species. 



Named in honor of ^Mr. H. L. Viereck, who collected a large 

 amount of material in this genus in New ]\Iexico, which is recorded in 

 Cresson's paper on the family,^ arid at whose in^dtation I visited the 

 type-locality on the date of capture. 



PIPUNCULUS WINNEMANN^E, new species. 

 Plate 46, figs. 2 and 3. 



Male. — Eyes coherent for longer than the length of frons, frons 

 black, white dusted except on the raised central ridge of upper half; 

 face brown, as broad as frons at above antennas, parallel-sided, 

 covered with, gra^dsh dusting; antennae black, third joint acuminate 

 (see fig. 3), arista glossy bro\^Ti and swollen at base, palpi small, 

 brown; occiput white dusted on lower half, brown dusted above, 

 postocular cilia white. Mesonotum su'bopaque brown-black, a very 

 few microscopic hairs on disk and numerous short ones on lateral 

 margins; humeri black-brown; pleurae slightly shining, black with 

 whitish dusting;' scutellum subopaque, a few pale post-marginal hairs 

 present, postnotum gra3'-brown dusted. Abdomen short and rather 

 broad, slightly oval in outlme, segments opaque brown at bases, sub- 



> Trans. Amer. Ent. Soc, vol. 36, 1911, pp. 207-329. 



