NORTH AMEHICAN DIPTERA. 297 



less in extent or even wholly wanting, except the basal spot. Males 

 from Kansas, Colorado and California I cannot distinguish, though 

 the abdomen more frequently has less or no black. 



Heinyda sp. 



The type species of this genus, H. aurata R. Desvoidy, has been 

 recognized by Mr. V. v. Roeder (Berl. Ent. Zeitschr. xxv, 212) 

 among specimens from Missouri. I have a specimen from Washing- 

 ton Territory that may be the same. The genus is very distinct from 

 Ocyptera in the open first posterior cell, the very long third antennal 

 joint, and the thickened large hypopygium folded beneath the ab- 

 domen. My specimen has a very glossy silvery golden face, black 

 antenuc^, elongate-oval bright shining black frontal stripe, a broad 

 light yellow, translucent, interrupted band on the second abdominal 

 segment, much broader and complete on the venter, and a narrow, 

 interrupted, basal, dorsal band on the third. Legs yellow, the distal 

 half of hind femora, the four front femora in front, and all the tarsi 

 black. Length 9 mm. The genus Ancydogaster Bigot (Bull. Soc. 

 Ent. Fr. 1884, 95), seems to be closely allied. 



Dejeania corpulenta Wiedemann, Auss. Zw. ii, 280; Schiner, Novara 

 Exped. 337; D. rufipalpis Macquart, il, 3, 35, 5, pi. iii, fig. 1; D. vexatrix O. 

 Sacken, West. Dipt. 343. 



Hab. — Colorado, New Mexico, Arizona, Mexico, South America. 



A very common and striking species. 



D. rutilioides Jaennicke, Neue Exot Dipt. 137. 



Hab. — New Mexico, Colorado, California, Mexico. 



The female has the front tarsal joints two-four very much dilated. 



D. hystricosa n. sp. 



% 9 • — Head, scutellum, and abdomen yellow, distal part of abdomen testaceous. 

 Length 13-14mm. 



Head whitish yellow, the ground color of the sides of the front black, but 

 nearly concealed beneath yellowish pollen ; frontal stripe ochraceous or reddish. 

 Antennae brown or black, the second joint and base of third on the inner side 

 more or less yellowish. Proboscis black, palpi yellow, projecting a third or a half 

 beyond the oral margin. Thorax black ; the humeri, sides, and posterior part of 

 the dorsum obscure yellow, dorsum rather thinly yellowish grayish dusted, when 

 seen from behind more thickly so, and with three slender stripes anteriorly. 

 Scutellum somewhat obscure yellow, with strong spines. Abdomen reddish yel- 

 low, the distal part more or less broadly testaceous ; with stout black spines, the 

 sides broadly bare in front, in the middle occupying the whole length of the seg- 

 ment, but not in the shape of a shallow V. Legs black ; tibiae yellowish or 

 brownish red, front tarsal joints of the female only a little dilated. Wings as 

 in D. corpulenta. 



Twenty -five specimens, Washington, New Mexico, Arizona. 



TKANS. AMER. ENT. SOC. XIII. ''68) OCTOBER, 1886. 



