24 PROCEEDINGS OF THE NATIONAL MUSEUM vol.69 



halteres deep yellow. Front narrow, 0.20 and 0.21 of the head width 

 in two specimens, with cinereous or slightly brownish pollen on the 

 parafrontals extending down around the eye; frontal bristles quite 

 erect. Proboscis retracted, small. Thorax shining black, with very 

 thin subcinereous pollen visible only in certain directions. 



Chaetotaxy: Acrostichal 2, 2; dorsocentral 3, 4; humeral 4; post- 

 humeral 1 ; presutm-al 1 ; notopleural 2 ; supraalar 3 ; intraalar 3 ; 

 postalar 2; sternopleural 2, 1 (the lower almost equally separated by 

 the two upper) . Scutellum as above. Postscutellum distinctly gray 

 poUinose, somewhat contrasting with the scutellum and metanotum. 

 Abdomen as above. Genitalia black. Legs black; all the claws and 

 pulvilli enlarged, the latter brown. Front tibiae with rather con- 

 spicuous flexor row and still larger outer row; middle tibiae with three 

 or four bristles on the outer front side and four or five on the outer 

 hind side, besides one flexor, and one directly on the posterior side; 

 hind tibiae with eight or ten alternating large and small bristles on 

 the outer side, five or six long bristles on the extensor surface. Wings 

 long and rather narrow, shghtly infuscated throughout, toward the 

 base more yellow; fourth vein with a rounded bend, shghtly concave 

 beyond, closing the first posterior cell in the apex. All the veins 

 bare. 



Female. — Front narrow, 0.33 and 0.34 of the head width at apex 

 in the two specimens. Palpi rather brown than black; first poste- 

 rior cell distinctly open, last section of fifth vein very short, decidedly 

 less than half the cross vein (in the male, full half the cross vein). 



Length, male 5.4 mm., female 5.8 mm. 



Described from two males (including type) and two females (includ- 

 ing allotype) collected at Belding, Micliigan, June 3, 1925, by L. G. 

 Gentner, received from H. J. Reinhard. 



Type.— Cat. No. 28929, U.S.N.M. 



Genus LYPHA Robineau-Desvoidy 



Lypha Robineau-Desvoidy, Myodaires, 1830, p. 141. — Aldrich and Webber 

 Proc. U. S. National Museum, vol. 63, art. 17, 1924, p. 10. 



LYPHA MACULIPENNIS, new species 



Female, — Readily distinct from Lypha duhia Fallen in having 

 a large blackish spot covering the small cross vein and the tip of the 

 scutellum broadly reddish. Like duhia, it has the eyes densely pilose, 

 the frontal bristles descending below the level of the arista and a 

 single large pteropleural bristle which is nearly as large as the principal 

 supraalar. 



Front rather narrow at vertex (0.1.5 of the head width), widening 

 uniformly as viewed from in front; the bucca one-half the eye height; 

 antennae black, the third joint about twice the second; penultimate 



