244 KANSAS UNIVERSITY QUARTERLY. 



terior borders of the segments; in the wider interruption of the second 

 segmental fascia; and in the greater extent of black pile at the lateral 

 posterior angles of the segments. 



From borealis it is distinguishable by the greater distinctness of 

 the median thoracic stripes; by the yellow lateral portion of the 

 whitish abdominal fascise on the third segment, which in this speci- 

 men reach the lateral margin; by the shorter whitish spots of the 

 fourth segment which do not attain the lateral margin; and by the 

 lack of a distinct longitudinal groove in the hind femora of the 

 female. 



Mallota albipilis. n. sp. 



Female. Black, pile everywhere yellowish white. Face and front 

 thickly covered with whitish yellow pollen which has a darker shade 

 on the front; median stripe of face and the cheeks shining black, 

 except a small red spot immediately beneath the eyes. Antennae 

 dark brown, third joint broader than long, rounded; arista yellow. 

 Eyes bare. Pile of the disk of the mesonotum more yellow, than 

 upon the margins and pleura; the dorsum thickly covered with dark 

 yellow pollen through which two slender median and two broad 

 interrupted lateral stripes show obscurely. Scutellum yellow, with 

 long whitish pile. Abc'omen somewhat longer than the thorax, 

 arched, shining black, appearing almost bare, the thin whitish pile 

 being most noticeable at the sides. Legs shining black or brownish 

 black, the tarsi lighter; pile altogether whitish. Basal half of wings 

 hyaline, distal half faintly infuscated; an obscure median subfasciate 

 brown spot. — Length ii mm. 



One female specimen, Las Cruces, N. M. (Townsend, June 9). 



Distinct in its light colored short pilosity, and almost bare abdo- 

 men. It resembles BracJiypalpus in form. 



Tropidia incana Towns., MS. 



The type of the species, a female, is from Colorado (Gillette, No. 



Xylota analis Will, 



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

 August, 8500 ft.). Recorded also from California. 



Xylota flavitibia Big. 



Six males anil two females, Manitou Park, Colo. (July, August); 

 one male, Colorado, (Gillette, No. 537); one male, Magdalena moun- 

 tains, N. M. (August). Described from Colorado. 



