142 ENTOMOLOGICAL NEWS. [May, '05 



abdomen wider, otherwise there is little variation from speci- 

 mens taken near Lawrence. 



Helophilus similis Macq. 



This species is represented -by numerous specimens of both 

 sexes. They were taken in company with the closely allied 

 form H. latifrons. 



Helophilus obscurus Loew. 



A single specimen of this species agrees with the description, 

 save that there is no brown ring on the hind tibiae, the abdo- 

 men is more shining and some of the cross-bands are not 

 interrupted. 



Paragus bicolor Fabr. 



But one specimen of this little Syrphid was taken this 

 summer. The specimen, a male, is smaller than the Kansas 

 specimens and the abdomen shows more black. Length 4 mm. 



Syrphus arcuatus Fall. 



One female specimen is lighter in color and smaller than a 

 specimen from Arizona. The occiput is rather more pilose, 

 the hind femora more extensively black, and the yellow spots 

 on the fourth segment are only slightly arcuate. 



Syrphus ruficaudus Snow. 



One female specimen measuring 10 mm., taken at the base 

 of Prospect Peak at an altitude of 7,200 feet, agrees very well 

 with Snow's description (K. U. Quart. '92). The abdominal 

 band on the third segment is scarcely at all subinterrupted and 

 there is a more noticeable reddish cast to this segment than 

 obtains in the type specimens. The legs in my specimen are 

 entirely reddish yellow and show no signs of black. Taken in 

 August. 



Syrphus montivagus Snow. 



One female specimen measuring 10 mm. agrees with the de- 

 scription and with the type specimens. Some of the types 

 show more red on the fourth segment than my specimen 

 has. The cross-band is entirely interrupted in the Wyoming 

 specimen and the spots are more arcuated than is the case 

 with any of the type specimens. Among the types I find a 



