HYMENOPTERA— EUMENIDAE.— EUMENES COLOR ADENSIS. 717 



74. PHILANTHUS VENTILABRIS. 



Philanthus ventilabris, Fabe., Ent. Syst., supp]., 208. 



3 9 specimens: Colorado; Wm. H. Hance: New Mexico; Dr. H. C. 



Yarrow. 



75. CEECEEIS PROSTATA. 



Cerceris frontata, Say, West. Q.uar. Rep., ii, SO. 



2 9 specimens; Colorado; Dr. H. C. Yarrow. 



70. CERCERIS BICOR3TUTA. 



Cerceris bicornuta, GUER., Icou. Reg. Anim., 443, 9 . 

 Cerceris Dufourii, Guer., Icon. Reg. Anim.. iii, 444, £ . 

 Cerceris venator. Cress., Pi'oc. Ent. Soc. Phila., v, 110, <£. 



11 S 9 specimens; Eastern Nevada; 1872: Colorado, New Mexico; 



Dr. H. C. Yarrow. 



77. CERCERIS SEXTA. 



Cerceris sexta, Say, Bost. Jour. Xat. Hist., i, 382. 



2 ? specimens; Colorado: Wm. II. Hance. 



78. MASARIS VESPOIDES. 

 Masaris vespoicles, Cress., Proc. Ent. Soc. Phila., ii, 69. 



1 ef specimen; Colorado; 1873; Dr. J. T. Rothrock. 



79. ODYNERUS CAPRA. 

 Odynerus capra, Saitss., Rev. Mag. Zool., 1857, 273. 



2 <? 9 specimens; Eastern Nevada; 1872: New Mexico; Dr. H. C. 

 Yarrow. 



SO. EUMENES COLORADENSIS, sp. nor. 

 9. — Black; rather densely clothed with a short, pale pnbescence; apex 

 of clvpens, two oblique splits on upper margin (sometimes nearly confluent 

 with apical spot), clavate spot between antenna?, dot behind summit of each 

 eye, scape beneath, anterior margin of prothorax, dot beneath wings, dot 

 on each side of scutellum, postseutellum, a round spot on each side of meta- 

 thorax at base, apex of femora, anterior pair beneath, all the tibia?, dot on 

 each side of first segment of abdomen above, its narrow and wavy apical 

 margin, a transverse, rather oblique mark of variable size on each side of 

 second segment, its broad, apical margin (narrowed laterally, sometimes 

 deeply indented on anterior middle, sometimes entire, inclosing a black dot), 



