228 Annals Entomological Society of America [Vol. X, 



in the male, black pilose, segment four with entirely yellow pile, in 

 both a small black shining spot in the middle shows the ground color. 

 Legs black, with stout black pile, tips of femora, bases of tibiae and tarsi 

 reddish brown. Wings with a brownish tinge, decidedly colored along 

 the veins. 



Habitat: One male; 1 female, C. R. Jones and C. S. Fluke, 

 Collectors, Estes Park and Poudre Canon, August, 1915. 



V. rufomaculata differs from V. evecta in the color of the 

 thorax, the latter being black and the former being blue; the 

 eyes of the female in V. riifomaciilata are pilose throughout, and 

 in V. evecta they are bare or at most pilose near the top; the 

 abdomen, outside the second segment, in V. evecta, is entirely 

 shining black, while in V. rufomaculata it has a large, red 

 dorso-medial interrupted spot. 



Mallota flavoterminata n. sp. 



Length, cf 13 mm., 9 15.5 mm. Eyes bare, narrowly separated in the 

 male; frontal triangle of the male thickly covered with grayish pollen, 

 whitish pile along the sides and top. Front of the female narrowed 

 above, greenish black, shining, with yellowish pile and a narrow stripe 

 of grayish pollen on each side below the ocelli. Face, deeply concave 

 below the antennas to the tip of prominent tubercle; from tubercle to 

 oral margin almost perpendicular; on the sides densely covered with 

 grayish pollen. The broad, black median stripe is one-third the width 

 of the face, wholly shining. Pile in the male, silvery, sparse, and 

 rather long; in the female, short, whitish, mixed with golden yellow; the 

 pollinose stripe in both sexes runs to the oral margin. Cheeks black, 

 shining; antennae brownish-black, the third joint covered with grayish 

 pollen, a little wider than long; arista reddish, dorsal. Dorsum of 

 thorax, in ground color, black with slight gray pollen on humeri, moder- 

 ately shining, covered with long, thick golden pile. The female more 

 densely covered than the male with a patch of whitish pile at the base 

 of the wings. Scutellum, light yellowish, with the same colored pile as 

 the thorax, but more dense and longer. Pleura with grayish pollen and 

 long, light yellow pile. Abdomen, obtusely conical, shining, first 

 segment with yellow and black pile, second and third with short, stout, 

 black pile; the posterior margin of segments with a transverse band of 

 yellowish pile; fourth segment shining, in the male, reddish brown with 

 wholly yellow pile, more dense laterally; fifth segment reddish brown, 

 sparsely pilose, fourth and fifth segments of the female black, shining, 

 with yellow pile. Legs of both sexes black with black and white pile, 

 the tarsi dark reddish, last joints and base of tarsal claws fuscus; hind 

 femora in both sexes much thickened; hind tibiae compressed arcuate. 

 Wings hyaline with a distinct brown picture. 



Two specimens, one male, C. S. Mead, Poudre Canon, 

 Fort Collins, Colorado, 1913; one female, A. Maxson, on beet 

 blossoms, Longmont, Colorado. 



