THE CANADIAN ENTOMOLOGIST 23 



tion of Ri+'a] basal deflection of Cui at the fork of M; cell 1st Mi 

 closed. 



Abdomen black, the basal segments indistinctly reddish 

 medially, the caudal margins pale; basal sternites yellowish, the 

 apical segments dark brown. Male hypopygium with the fleshy 

 ventral lobes bright honey-yellow, the remainder of the hypopygium 

 black, in great contrast with these lobes. 



Habitat. — Colorado. 



Holotype, cf, Bear Creek, Morrison Co., Colorado; October 

 .20, 1915 (Oslar). 



Allotype, 9 , with the type. 



Paratopotypes, 2Q & 9 . 



Tribe Antochini. 

 Genus Antocha Osten Sacken. 

 Antocha monticola, sp. n. 



Antennae brown; head grayish yellow; thoracic dorsum with- 

 out stripes. 



Male. — Length 5.5 mm.; wirjg 7.1 mm. 



Female. — Length 5-6.4 mm.; wing 7-8 mm. 



Rostrum and palpi dark brown. Antennae dark brown with a 

 coarse, white pubescence; flagellar segments rather small, the two 

 or three apical segments longer than those segments immediately 

 before them. Head grayish yellow, with an indistinct, narrow, 

 dark brown median line. 



Pronotum dark brow^n. Mesonotum light brownish yellow 

 without distinct stripes ; median area of the prsescutum behind 

 more grayish pruinose; scutum light yellow, the median area 

 grayish pruinose; scutellum yellowish white; postnotum brown. 

 Pleura pale grayish yellow. Halteres short, pale yellow, the knobs 

 brown. Legs with the coxse pale yellow; femora yellow, a little 

 darkened apically; tibise brownish yellow, slightly darker at the 

 extreme tips; tarsi dark brown. Wings whitish opalescent; stigma 

 elongate, indistinct, yellowish; veins pale brown. Venation: 

 cross- vein r present; cell 1st Mi small; basal deflection of Cui 

 before the fork of M. 



Abdomen brownish yellow above, the apical segments darker; 

 hypopygium orange. 



Habitat. — Colorado. 



