SNOW: DIPTERA OF COLORADO AND NEW MEXICO. 245 



Xylota ejuQcida Say. 



Three females, Colorado and Magdalena mountains, N. M. (August, 

 8500 ft.). Known over the whole United States. 



Syritta pipiens Linn, 



Abundant, except at the higher altitudes, in the following localities: 

 Idaho Springs, Bailey, Manitou Park, Colorado Springs, Estes Park, 

 in Colorado; Albuquerque, Las Vegas, Santa Fe, Socorro, Magdalena 

 mountains, Las Cruces, in New Mexico. — Common to the whole 

 United States, Europe, Asia, Africa. 



Chrysochlamys croesus O. S. 



Four specimens, Colorado; over a hundred specimens, mostly 

 males, Hop Canyon, Magdalena mountains, N. M. (July, August, 

 7000 to 9500 ft.). In the latter locality they were numerous from 8 

 to lo o'clock a. m. in the canyon at an elevation of something less 

 than 8000 feet. At this time the males could be taken as they flew 

 arouad, or alighted upon, the trunks of large spruce trees, always 

 choosing the sunny side. A few specimens were collected near the 

 top of a mountain which rises to about 9500 feet. A western species. 



Spilomyia liturata Will. 



Five males and one female, Magdalena mountains, N. M. (August, 

 over 9000 ft.), are best placed here. The type was from New 

 Mexico. 



Spilomyia kahli n. sp. 



Male. Yellow, red and black, variegated. Vertical triangle reddish 

 brown, more yellow on the lower part; frontal triangle yellow, near 

 the orbits with silvery pollen; antennal process reddish brown, on 

 under side yellow. Antennae reddish brown, second joint one and a 

 half times the length of the first, third joint a little broader than long. 

 Face yellow with no median stripe; cheeks and oral margin reddish 

 brown; proboscis blackish. Occiput, except just below the vertex, 

 black. Thorax black, subopaque; hurnerus, a large triangular spot 

 on its inner side, and ante-alar callosity, yellow; a broad reddish 

 lateral stripe from the scutellum to the suture includes the post-alar 

 callosity and touches the ante-alar callosity; just before the 

 scutellum is a broad crescentic subinterrupted reddish spot, so broad 

 that only a sublinear black space separates it from the scutellum; a 

 large mesopleural spot reddish, a smaller sternopleural spot just 

 below the former and a spot below the tegulse, yellow. Scutellum 

 wholly reddish brown. Abdomen hardly as wide as the thorax, 

 \*idest at the second segment, strongly convex above; first segment 



