69 



of the femora black; the end of the latter the tibiae, except a black wing in 

 the middle of each, and the three basal joints of the tarsi are of a saturate 

 yellow; the two last tarsal joints black. The proximal two-thirds of the 

 wings are tinged with yellowish, the remainder is gray; the latter coloring 

 extends along the posterior margin as far as the axillary excision; within the 

 yellow portion, there is a hyaline spot in the angle between the first and sec- 

 ond veins (at the i^roximal end of the marginal cell) ; the veins near the root 

 of the wings are all tinged with yellow. 



Habitat, Quebec (Mr. Belanger). A single female specimen. 



6. Arctophila flagrans n. sp. i . 



Face wax-yellow, cheeks black; antennae; basal joints brownish; third joint 

 reddish, the plumose arista black. Thoracic dorsum densely clothed with yel- 

 lowish hair, through which, however, the metallic brownish-coppery ground- 

 color is apparent; pleurae black in the middle with a stripe formed by yellow 

 pile. Abdomen with long yellow pile at the base and s-n the sides; with 

 reddish hair in the middle and at the tip; between the hairs, the black, metal- 

 lescent ground color is apparent. Legs black; front tibiae beset on the inside 

 with short, golden-yellow hairs; three basal joints of the four posterior tarsi 

 brownish-red. Winga with a slight grayish tinge; a brown spot limited by 

 the fourth longitudinal vein, the costa, the small cross-vein and the origin of 

 the third vein, the latter vein is more deeply sinuate than in A. homhiformis. 

 Length 13 m. m. 



Habitat, Colorado Mountains (Lieut. "W. L. Carpenter). 



7. Xylota vecorsn. sp. « ?. 



Thorax brownish bronze-color; abdomen black; legs, including the coxae, 

 ferruginous; end of hind femora, the hind tibiae and tarsi black. Length, 13- 

 14 m.m. 



Face and cheeks black, with a greenish reflection and a delicate whitish down 

 on the sides; antennal reddish-brown; front black, with some black, erect 

 hairs. Thorax brownish bronze-color, with indistinct longitudinal greenish 

 stripes; pubescence sparse, short, erect, brownish-yellow, mixed with black ; 

 a whitish sericeous spot inside of the humeri; pleurae greenish-black, with 

 blackish hairs; scutellum greenish bronze-color. Abdomen black, with a bluish 

 or purplish reflection and scattered whitish and black hairs. Knob of halteres 

 black, stem reddish. Legs ferruginous, including the coxae; the tip of the 

 ungues brown; the distal third of the hind femora, the hind tibiae and hind 

 tarsi black. Winga tinged Avith browuLsh, proximal half more hyaline; stigma 

 dark brown. 



Habitat, White Mountains, N. IL (E. P. Austin and H.K. Mor- 

 rison). Three males and two females. 



