14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. go 



A male which is tentatively associated with this species has the 

 cheeks partly obscurely yellowish. 



Three females and the above-mentioned male, from the type lo- 

 cality. 



Type locality. — Yellow Dragon Gorge near Songpan, 12,000- 

 14,000 feet, Szechuen, China (D. C. Graham). 



Type. — Female, and two female paratypes. Cat. No. 21314, 

 U.S.N.M. 



CHRYSOTOXUM TARTAR, new species 



Female. — Distinguished from the foregoing by its much more yel- 

 lowish appearance; antennal joints 1:1.25:2; arista yellow, longer 

 than the basal joints; cheeks yellow; yellowish mesonotal and black 

 scutellar pile; pteropleura black with black pile; sternopleura with 

 yellow spot; femora darkened basally; abdominal pile mostly yel- 

 low, but blackish on first tergite; abdominal margins normally 

 banded, alternately black and yellow; arcuate bands rather broad, 

 joining side margins; yellow bands on post margins of tergites 3 

 and 4 very broad; yellow spots on sternites 4 and 5 not reaching 

 anterior margin. 



Length, 14 mm. ; wing, 12 mm. 



One specimen. 



Type locality. — West of Chetu Pass near Tatsienlu, 13,000- 

 14,500 feet, Szechuen, China (D. C. Graham). 



Ty^e.— Female, Cat. No. 21315, U.S.N.M. 



CHRYSOTOXUM TUBERCULATUM, new species 



Male. — A fairly large species possessing the unique character of 

 an obtuse spinose spur on the hind coxa. Antennal joints 1:1.5:2; 

 arista yellow and longer than the basal joints; frons black, broadly 

 margined above with yellowish pollen; cheeks yellow; thorax en- 

 tirel}^ yellow pilose ; an obscure yellow spot above fore coxa ; a larger 

 one on the sternopleura; legs yellow, the hind tarsi black and 

 densely setose; abdominal pile rather long and yellow, with shorter 

 and black hairs toward apices of sternites; abdominal margins alter- 

 nate black and j^ellow; the apical corners of the tergites projecting; 

 arcuate bands very moderately curved, the first broadened toward 

 the ends and the yellow extending forward (inside of the black 

 margin on the anterior half of the second tergite) nearly to the 

 anterior margin ; second sternite very narrowly yellow on hind mar- 

 gin; the third with a narrow anterior band which does not meet 

 the fore margin, narrowly yellow on hind margin; the third witli 

 a narrow anterior band which does not meet the fore margin, nar- 

 rowly 3^ellow on post margin ; the") fourth very narrowly yellow on 



