327 



of head, glossy black, a conspicuous yellow line on each side extending 

 from base of antennae somewhat above middle of frons, its upper 

 portion being separated from the eye-margin by a narrow black line ; 

 face glossy black, slightly yellowish on each side, and with a con- 

 spicuous silvery, pilose, stripe which extends beyond the lower extrem- 

 ity of the yellow line on frons ; posterior eye-orbits conspicuously yel- 

 low. In other respects as in the male. 

 Length, 5 mm. 



Type locality, Muncie, Illinois, July 5, 1914 (J. R. Malloch). 

 Allotype (male), Lafayette, Indiana, June 23 (J. M. Aldrich). 



The type specimen was taken by sweeping vegetation on the bank 

 of Stony Creek. The allotype is in the collection of Prof. J. M. Al- 

 drich; the type, in the collection of the Illinois State Laboratory of 

 Natural History. 



This species is closer in general appearance to centralis Loew than 

 to any described North American species, but may be readily separated 

 from it by the entirely yellow legs, the greater amount of black on 

 scutellum, and the presence of pleural spots, as well as by other charac- 

 ters. 



Oxycera variegata Latreille 



Oxycera variegata Latreille, Encycl. Meth., Vol. 8, p. 600. (1811) 



Oxycera variegata (Olivier) Macquart, Dipt. Exot., Vol. 1, Pt. II, p. 191. (183S) 



Oxycera unifasciata Loew, Berl. Ent. Zeitschr., Vol. 7, 1863, p. 9. 



Male. — Black, shining, with conspicuous lemon-yellow marks. 

 Head black ; frons with a lateral line of white pilosity which connects 

 with a similar line on sides of face, the latter abruptly narrowed on 

 lower portion; face with 2 yellow spots below bases of antennae; 

 mouth parts yellow; antennae reddish yellow, apical joint (6th) and 

 arista brownish; occiput and anterior eye-orbits black. Thoracic 

 vittae yellow, 4 in number, submedian pair slightly dilated anteriorly, 

 and with a perceptible outward curve, occasionally connected with 

 the sublateral pair, interrupted at suture, the portion beyond suture 

 subtriangular and extending to posterior margin of disc; sublateral 

 vittae broader than submedian pair, slightly dilated anteriorly, at 

 suture, and posteriorly, connected with lateral stripe by humeral spot ; 

 pleurae with 2 spots on posterior portion; scutellum black only on 

 extreme anterior margin and apices of thorns. Abdomen black; a 

 large oblong spot on base of dorsum, a small lateral spot on sides of 

 second segment, a complete fascia (which is slightly emargtnate on 

 posterior margin) on third segment, a large oblong spot on fourth 



