234 AMERICAN HYMENOPTERA. 



Cerceris sexta Say. 



Humphrey's Peak, August, 1902 (Snow). 



Cerceris biungulata Cress. 



Oak Creek Canon, 6000 ft., August, 1902 (F. H. Snow). 



Cerceris platyrhiiia Viei-. and Ckll. 



August, 1902 (F. H. Snow). 



Specimen No. 151, % , has the following characters worthy of men- 

 tion : clypeus anteriorly with four short, acute, rather tuberculate, 

 equidistant projections. Enclosure of the metathorax rather coarsely 

 striate. Pygidial area oblong, shining, closely coarsely punctured, 

 a short spine just beneath and on a line with the lateral margin. 

 Color almost exactly as in the female ; middle and posterior tro- 

 chanters and posterior coxse partly yellow ; posterior femora with 

 the basal third yellow. 



Cerceris macrosticta Vier. and Ckll. 



Oak Creek Canon, 6000 ft., Aug., 1902 (F. H. Snow). 



Cerceris ferruginior Vier. and Ckll. 



Oak Creek Canon, 6000 ft., August, 1902 (F. H. Snow) ; Bill 

 William's Fork, A.ugust (F. H. Snow). 



Cerceris feimir-rnbriim Vier. and Ckll. 

 Congress Jc, July (F. H. Snow). 



Cerceris fasciola Cress. 



Oak Creek Canon, 6000 ft., August, 1902, July (F. H. Snow). 



Cerceris rinconis Vier. and Ckll. 



Bill William's Fork, August (F. H. Snow). 



Cerceris acauthophilus Vier. and Ckll. 



Congress Jc, July (F. H. Snow); Oak Creek Canon, 6000 ft., 

 August, 1902, July (F. H. Snow). 



Aphilantliops qnadrinotatus Ashtn. 

 Flagstaff, August, 1902 (F. H. Snow). 



Aphilanlhops taurnliis Ckll. 



Congress Jc, July (F. H. Snow). 



