104 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



tarsal joint of the hind legs somewhat swollen. Length, 7.5 mm.; wing 

 5 mm. 



Allot ype Female: Differs from the male as follows: Frons rather smoothly, 

 transversely rugose, interrupted medianly by a very shallow longitudinal 

 furrow, the pile short, yellowish brown. Stripes on the mesonotum more 

 distinct, silvery green. Abdomen nearly as broad as long. Length about 

 6.5 mm.; wing 5 mm. 



Pacific Grove, California, two males and two females, May 9, 

 1906, wet meadows in woods (J. M. Aldrich). 



Type: Cat. No. 20279 U. S. N. M. 



This species appears to be closely related to C. stigmata Will., 

 but this latter species has elongate antennae, shorter pile on the 

 frons and the pollinose band below the antennae is represented 

 by only two silvery spots at the sides. 



Chrysogaster parva, new species. 



Small, light greenish bronze species. 



Male: With whitish, short pile on ocellar triangle and frons, shorter 

 on the frons. Antennae fulvous, darker on tipper margin, third joint a 

 little longer than broad, arista dark, a little shorter than antennae and 

 without perceptible pubescence. Face greenish black, with whitish pol- 

 linose band below the antennae and beneath this broadly, faintly rugulose; 

 the pile white, very short and scattered. Thorax with very short brown- 

 ish pile; mesonotum with four faint copper-colored vittae. The sub- 

 opaque disc of the abdomen surrounded by shining sides. Hypopygium 

 large, with inconspicuous, white pile. Wings somewhat smoky. Squa- 

 mae whitish; halteres yellowish. First tarsal joint of the hind legs not 

 swollen. Length: 5 mm.; wing about 4 mm. 



Allotype Female: Frons greenish black, with transverse rugose ridges, 

 interrupted medianly by a longitudinal, very shallow depression and with 

 very short, whitish pile which is longer on ocellar triangle. The vittae 

 on the mesonotum more distinct than in the male. Abdomen broad and 

 oval. Length about 5.5 mm.; wing about 4.75 mm. 



Colorado, nine females, one male (four of these were placed by 

 Williston under C. nigrovittata) ; Lake Tahoe, California, one male 

 and one female; Ormsby, Nevada, one 9 , July 6 (C. F. Baker); 

 Reno, Nevada, one 9 (H. F. Wickham); Garland, Colorado, a 

 pair in copulation, June 18. 



The four specimens mentioned last are larger than the others. 



Type: Cat. No. 20280 U. S. N. M. 



The types are labeled only "Colorado." 



This species is very closely related to robusta, but is smaller 

 and much less robust, the pile on the frons is shorter, the arista 

 shorter and apparently entirely without pubescence, while there 



