T. D. A. COCKERELL. 305 



Upper Sonoran. 



A. cognatum Cress. Organ Mts. Type from Georgia. 

 A. lupinellum Ckll. Pecos.* 

 A. pecosense Ckll. Pecos.* 



Upper to Middle Sonoran. 



A. porterse Ckll. L. V.® ; Pecos (mut. amabile Ckll.) ; M. Y. The nuit. amiibile 

 was taken at Boulder, Col., Aug. 5, 1906. 



Middle Sonoran. 

 A. parosetse Ckll. M. V.* 



Locality Unknown. 



A. emarg-inatum Say iatrifrons Cress. 1. "New Mexico." In Colorado this 

 occurs from the Canadian Zone (Ward) to the border of the Upper Sonoian 

 (Boulder). 



DIA]VTHIDIU]VI Ckll. 



D. perpictum Ckll. Beulah (I'J, ) ; Eio Ruidoso ■ ■; li. V. 



D. gilense Ckll. Gila River*; Las Valles; Pecos, fls. Geranium atropurpureiim. 

 Aug. 21, 9 (W. P. C). 



D. parviim Cress. S. F. ; L. V.; Pecos; Organ Mts. 



D. curvatum .Smith. Albuquerque; Chaves; M. V. 



D. larrese Ckll. M. V.- 



MOXIIMETHA Cress. 

 M. albifrons Kirby. Beulah ; Mescalero. 



OSMIA Pauz. 



Hudmnian Zone. 



O. inurbana Cress., var. (Mr. Titus thinks probably a distinct species). Top (jf 

 Las Vegas Range ; cf. Psyche, Dec, 1901, p. 283. 



Hudsonian to Transition. 

 O. faceta Cress. Top of Las Vegas Range; Beulah; Mescalero. 



Canadian Zone. 

 O. fulg-ida Cress. Beulah. 

 O. armaticeps sapellonis Ckll. Beulah.* 



O. meg-acepbala Cress. Head of Dailey Canon, Las "S'egas Mts. 

 O. densa Cress. Beulah. 

 O. nigrifrons Cress. Beulah ; Johnson Park, July 4, fls. laco-weed (A. Gohr- 



nian). 

 O. nigrifrons subaustralis Ckll. Beulah.* 

 O. juxta Cress. Beulah. 

 O. n. sp. Titus. Rociada. This is the species which I considered to be O. mandi- 



bidaris Cress. ; Mr. Titus has seen the type of mnndibnluris, and finds it 



distinct. 



TBANS. AM. ENT. SOC. XXXII. (39) NOVEMBER, 1906. 



