Biological Papers. 135 



Family Trypoxylonid^. 

 Trypoxylon arizonensis Fox. Bill Williams fork, 4 specimens. 



tridendatum Packard. Congress Junction, 2 specimens; San 

 Bernardino ranch, 1; Tucson and Baboquivari, 8 each. 



Family Philanthid-e. 



Eucerceris canaliculatus Say. Bill Williams fork, 5 specimens ; San Ber- 

 nardino ranch, 3. 

 rubripes Cress. Oak creek, 15 specimens, 

 unicornis Patton. Oak creek, 6 specimens. 

 Cerceris acanthophilus V. & C. Congress Junction, 12 specimens; Bill Will- 

 iams fork, 4; Oak creek, 6; Tucson, numerous, 

 biungulata Cress. Oak creek, 1 specimen. 



ferruginior Viereck and Ckll. Oak creek, 5 specimens; Bill Will- 

 iams fork, 1; Tucson, many, 

 fasciata Cress. Oak creek, 3 specimens, 

 femur-rubrum V. & C. Congress Junction, 1 specimen, 

 macrosticta V. & C. Oak creek, 2 specimens, 

 nasica V. & C. Oak creek, 2 specimens, 

 platyrhina V. & C. Oak creek, 1 specimen, 

 rinconis V. & C. Congress Junction, 1 specimen; Bill Williams 



fork, 6; Tucson, 4. 

 sexta Say. Humphrey's Peak, 1 specimen. 

 Philanthus albifrons Cress. Humphrey's Peak, 3 specimens ; Oak creek, 2. 

 crabroniformis Smith. Congress Junction and Bill Williams 

 fork, numerous specimens; Oak creek, 3; San Bernardino 

 ranch, 1. 

 punctatus Say. Oak creek, numerous specimens ; Bill Williams 

 fork. Congress Junction, and Baboquivari, 1 specimen in each 

 locality; Tucson, numerous specimens, 

 punctatus cockerelli Dunn. Oak creek, 3 specimens, 

 new species. Oak creek, 3 specimens. 

 Aphilanthops taurulus Ckll. Congress Junction, 10 specimens, 

 quadrinotatus Ashmead. Flagstaff, 1 specimen, 

 new species. Flagstaff, 1 specimen. 



Family Mimesid.e. 



Mimesa punctata Fox. Oak creek, 4 specimens. 



unicincta Cress. Bill Williams fork, 1 specimen. 



Family Pemphredonid^. 

 Stigmus inordinatus Fox. Oak creek, 1 specimen. 

 Pemphredon inordinatus Say. Oak creek, 1 specimen. 



Family Crabronid^. 



Crabro bellus Cress. Oak creek, 1 specimen. 



chrysarginus. Oak creek, 14 specimens. 



decemmaculatus Say. Oak creek, 20 specimens. 



dilectus Cress. Oak creek, 8 specimens. 



imbutis Fox. Oak creek, 5 specimens. 



interruptus St. Farg. Oak creek, 1 specimen. 



nigrifrons Cress. Humphrey's Peak, 2 specimens. 



odyneroides Cress. Oak creek, 5 specimens. 



packardii Cress. Oak creek, 14 specimens. 

 Thyreopus-coloradensis Packard. Humphrey's Peak, 2 specimens. 



