246 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



the sides, and only snb-iuterrupted in the middle; the posterior marj?ins 

 of the second-tifth sej^iuents with the bands of equal width throughout, 

 not interrupted. Legs yellow ; the four hind tibiae at the tip and their 

 tarsi reddish, tln^ front tibia?, except the base, and their tarsi black; 

 hind femora broadly blackish on the posterior side. Wings with a 

 brown anterior border, nearly hyaline behind. 



One specimen, New Mexico (G. F. Gaumer). The present species 

 is nearly related to longicornis and interrnpta, but is at once distinguish- 

 able from the former by the longer antennae ; from the latter by the an- 

 tennae being a little longer, by the abdominal bands being entire, or not 

 distinctly interrupted; from both by the spots on the pleurae, and the 

 greater width of the abdominal bands. 



Spilomyia interrupta. (Plate XII, fig. 4.) 



Spilomyia interrupta Williston, Proc. Am. Phil. Soc.,xx, 327. 



Habitat. — Washington Territory ! 



$ . Length, 13 to 14""'". Closely allied to longicornis, but differs in the 

 bands of the abdomen being a little broader, the first, third, and fifth 

 very distinctly interrupted, and the two latter more dilated on the sides, 

 in the fifth segment in the female being in large part yellow, in the 

 presence of a small yellow spot on the sides of the dorsum above the 

 meso-pleurae, in the spots of the pleurae being smaller and distinctly sep- 

 arated from each other, not coalescent, and in the antennae being a 

 little longer. The cheeks are darker, and the hind femora on the pos- 

 terior side near the end may be quite black. The wing is broader, and 

 the last section of the sixth vein is distinctly shorter. All of these 

 differences may not be persistent in a large number of specimens, but 

 they are certainly suflicient to show that the species is distinct. 



Two specimens, Washington Territory. The relationship of S. Ion- 

 gicorrds, S. Hturata, and 8. interrupta with the European ^8*. saltuum and 

 8. dioplithalma is remarkably close. 



Spilomyia fusca. 



Spiloinijia fusca Loew, Centur., v, .34. 



Habitat. — Pennsylvania, Massachusetts, I^ew Hampshire, Georgia, 

 Canada! 



^,9. Length, IG to 17""". Head light yellow, somewhat shining, and 

 with short, sparse, whitish pile; vertex, an incomplete frontal stripe be- 

 low, and an oval si)ot on the face, black. Antennae reddish black, the 

 first two joints often quite black. Occiput black, orbits whitish pollinose. 

 Thorax opaque brownish black, with yellow markings as follows: humeri, 

 a rounded spot at their inner side, two oval spots, forming an obtuse 

 angle, in front of the scutellum, a vittula on each side, extending from 

 the post-alar callus and bent inwards in front to meet the suture, margin 

 of scutellum, a large meso-pleural, a smaller sterno-plenral and another 

 above the base of the front coxie. Abdomen broadly oval, brownish 

 black, very shortly black pilose ; third segment with a yellow band on 



