46 Everett E. Wehr 



the fourth segment has an anterior opaque band. The lighter hairs of 

 the body are yellowish. The brown spots on the wings are distinctly 

 marked. The yellow of the legs is less extended, especially on the tibiae. 

 This species was determined by Jones* as saxoriim. It may be dis- 

 tinguished from saxorum by the broader front and the absence of vel- 

 vety-black cross-bands on the abdomen in the female, the absence of a 

 velvety cross-band on the posterior margin of the fourth segment in the 

 male, and the less distinctly shining steel blue color of the entire body. 



Tijpe. Pike's Peak, Colorado, July 20, 1906 (L. Bruner). 

 9 . University of Nebraska collection. 



Allotype. Pike's Peak, Colorado, July 20, 1906 (L. Bru- 

 ner). $. University of Nebraska collection. 



Paratypes. Pike's Peak, Colorado, July 20, 1906 (L. Bru- 

 ner). 4 9 9, S$ $. University of Nebraska collection. 



Helophilus Meigen 



KEY TO THE SPECIES 



1. Face jutting forward into a cone conostomus 



Face not conically produced forwards 2 



2. Sixth longitudinal vein distinctly sinuous 3 



Sixth longitudinal vein nearly straight or only gently curved.... 4 



3. Front of female black pilose; front of male narrowed above. ...stmih's 



Front of female black pilose only near the ocelli; front of male 

 broad latifrons 



4. Abdomen elongate, cylindrical in the male 5 



Abdomen oval; face yellow 6 



5. Hind coxae of the male with a stout process below chrysostoimis 



(Hind coxae of the male not with a stout process 

 distinctus Willst). 



6. Luteous fasciae of the abdomen broad, the first narrowly inter- 

 rupted, the remainder entire integer 



Fascia on the third segment narrowly interrupted laetus 



*Ent. News, xviii, p. 241. 



152 



