138 Kansas Academy of Science. 



Family Melectid^. 

 Nomada texana Cress. Oak creek, 1 specimen. 



two new species. Bill Williams fork, 3 specimens. 

 Phileremus?, undetermined species. Oak creek, 1 specimen. 

 Ericrocis lata Cress. Bill Williams fork, numerous specimens. 

 Epeolus lunatus Say. Oak creek, numerous specimens. 



oecidentalis Cress. Oak creek and San Bernardino, numerous speci- 

 mens, 

 three undetermined species. Oak creek. 

 Triepeolus verbesinae Ckll. Bill Williams fork, 1 specimen, 

 five new and undetermined species. Oak creek. 



Family Stelid.is. 

 Stelis rudbeckiana Ckll. Oak creek, numerous specimens. 

 Ceolioxys alternata Say. Oak creek, numerous specimens. 



menthae Ckll. Bill Williams fork, 1 specimen ; Tucson, 25. 



modesta Sm. Oak creek, 2 specimens. 



octodentata Say. Oak creek, numerous specimens ; Tucson, 2. 



porteras Ckll. Oak creek, 2 specimens. 



ribis Ckll. Oak creek, 3 specimens. 



rufitarsus Sm. Oak creek, 1 specimen. 



sayi Robt. Oak creek, 2 specimens. 



texana Cress. Oak creek, 2 specimens. 



two undetermined species. Oak creek, several specimens each. 



Family Megachilid^. 

 Osmia mandibularis Cress., var. Humphrey's Peak, at base, 1 specimen. 



undetermined species. Oak creek, several specimens. 

 Heriades gracilior Ckll. Oak creek, 4 specimens. 



Ashmeadiella bigeloviae Ckll. Bill Williams fork, numerous specimens, 

 mehloti Ckll. Oak creek, 10 specimens, 

 rotundiceps Cress. Oak creek, 4 specimens. 

 Anthidium emarginatum Say. Humphrey's Peak and Oak creek, several 

 specimens, 

 maculif rons Sm. Oak creek, 1 specimen ; Tucson, several, 

 maculosum Cress. Oak creek, Humphrey's Peak, at base, and 

 Tucson, several specimens each. 

 Megachile agustini Ckll. Oak creek, numerous specimens, 

 avara Cress. Oak creek, numerous specimens, 

 brevis Say. San Bernardino ranch, numerous specimens, 

 lanuginosa Sm. (= brevis Say.) Oak creek, 

 cleomia Ckll. Oak creek, 3 specimens, 

 comata Cress. Oak creek, 3 specimens, 

 fidelis Cress. Oak creek, several specimens, 

 near inimica Cress. Oak creek, several specimens, 

 latimana. Oak creek, 3 specimens, 

 optiva Cress? Oak creek, several specimens, 

 perbrevis Cress. Oak creek, several specimens, 

 pereximia Ckll. Bill Williams fork, 1 specimen, 

 pugnata Say. Oak creek, numerous specimens, 

 relativa Cress. Oak creek, several specimens. 



