128 BULLETI^^ 116, UNITED STATES NATIOJTAL MUSEUM. 



tibiae, black from the tip of the first joint, which has a large bristle 

 near apical third above, and several bristles on the side. Hind tarsi 

 wholly black. Calypters and halteres yellow, the former with long 

 black cilia. 



Wings uniformly tinged with dark gray; costa not enlarged at tip 

 of firet vein; last section of fourth vein a little bent just before its 

 middle; hind margin of wing only a little indented at tip of fifth vein; 

 anal angle of wing rather prominent but rounded. 



Female.— Face wide, grayish white; fore tarsi plain, blackish from 

 the tip of the first joint; hind femora without cilia; hind tibiae of 

 normal size, with apical fifth or a little more black, this black not 

 sharply defined; middle tibiae with a pair of bristles at apical third 

 and two othei-s preceding them on the lower surface. 



Redescribed from 12 males and 4 females; J. M. Aldrich took 1 

 male at Erwin, South Dakota, June, 1908, and 3 pairs at Brookings, 

 South Dakota, June 12, 1891. I took 8 males at Chatham, Ontario, 

 June 17, 1915, and 1 male at East Aurora, New York, June 2, 1918. 



Type localities. — ^Middle States; Illinois. Aldrich reports it from 

 South Dakota, and Melander and Brues from Massachusetts. I have 

 seen a female from Outremont, Quebec, June 20. 



Type. — ^Museum of Comparative Zoology, Cambridge, Massachu- 

 setts. 



No. 83. DOLICHOPUS UNGULATUS Linnaeus. 



Musca ungulata Linnaeus, Fauna Suecica, ed. 2, 1761, No. 1858. 

 Nemotelus aeneus De Geer, Mem. Hist. Nat. Ins., ed. Goetze, 1782, p. 78. 

 Dolichopus aeneus Van der Wulp, Tidsch. v. Ent., vol. 22, 1869, p. 80. 

 Dolichopus ungulatus Lundbeck, Dipt. Danica, vol. 4, 1912, p. 146. 



Male. — Length 6 mm.; of wing 5 mm. Face rather narrow, 

 grayish, scarcely silvery. Front shining green. Antennae wholly 

 black; third joint about as long as wide, somewhat pointed at tip: 

 Orbital cilia wholly black. 



Thorax green with a little white pollen on the anterior part of the 

 dorsum; pleurae dulled with white pollen; scutellum with a fringe of 

 little pale hairs on the lower edge of the hind margin. Abdomen 

 green with coppery reflections toward the tip and narrow black 

 incisures, and with conspicuous spots of white pollen on the sides of 

 the segments. Hypopygium black, rather long; its lamellae 

 (fig. 83a) large, somewhat oval in outline but nearly straight below, 

 whitish with broad black border on apical margin and narrowly black 

 along the upper edge, jagged and bristled at lower apical corner, 

 otherwise fringed with delicate little brown hairs. 



Fore coxae black at base, apical half or more yellow, their anterior 

 surface covered with conspicuous black hairs ; middle and hind coxae 

 black with extreme tips yellow. Femora and tibiae yellow. All 

 femora with long black cilia on apical half below, the longest hairs 



