SNOW: DIPTERA OF COLORADO AND NEW MEXICO. 247 



black except along the orbits, where it is yellow. Thorax black, 

 pleura more reddish; humeri, ante-alar callosity, a short slender 

 stripe between the latter and the post-alar callosity, the scutellum, 

 except the immediate base, a long mesopleural spot and a contiguous 

 sternopleural one, and a large spot under the teguls, yellow. Abdo- 

 men reddish; second segment narrowly cylindrical at the base, much 

 wider posteriorly, and with a yellow hind border; third and fourth 

 segments with a similar band, that of the latter broader; fourth seg- 

 ment longer than the third, covered with grayish pollen, through 

 which the reddish brown color shows in many small round spots; 

 hypopygium reddish. Legs reddish, basal half of the tibiae yellow, 

 tarsi fulvous. The brown of the anterior portion of the wing is 

 limited by the third longitudinal vein. — Length 9 mm. 



One specimen, Las Cruces, N. M. (Prof. C. H. Tyler Townsend, 

 April 18). 



Additional Species Hitherto Recorded from Colorado and 

 New Mexico. 



Nausigaster punotulata 'Will. — N. M. 

 Chilosia lasiophthalma Will. — Colo. 

 Chilosia comosa Loew.— Colo. 

 Platychirus ciliatus Big. — Colo. 

 Syrphus amalopis (). S.— N.M. 

 Syrphus pauxillus Will. — N. M. 

 Syrphus sodalis Will.— Colo. 

 Volucella victoria Will.- N. M. 

 Eristalis scutellaris Fubr.— N. M. 

 Helophilus obscurus Loew. — Colo. 

 Helophilus bilinearis Will.— Colo. 

 Triodonta curvipes Wied. — Colo. 

 Crioprora cyanogaster Loew. — Colo. 

 Brachypalpus parvus Will.— Colo. 

 Xylota pigra Fabr.— Colo. 

 Xylota notha Will.— Colo. 

 Xylota metallifera Big.— Colo. 

 Xylota coloradensis Big. — Colo. 

 Temnostoma aequale Loew. — Colo. 

 Sphecomyia vittata Wied.— Colo. 



