Biological Papers. 133 



Family Sphecid.e. 

 Ammophila aberti Hald. Congress Junction, 3 specimens; Bill Williams 

 fork, 4; Tucson, 1. 

 argentifrons Cress. Oak creek, 5 specimens: Tucson, 1. 

 communis Cress. Oak creek, numerous specimens, 

 gryphus Smith. Oak creek, numerous specimens, 

 luctuosa Smith. Oak creek, 1 specimen, 

 macra Cress. Oak creek, numerous specimens, 

 pruinosa Cress. Bill Williams fork, 7 specimens; San Bernar- 

 dino ranch, 1; Tucson, 1. 

 strenua Cress. Oak creek, 1 specimen; Baboquivari, 1, 

 varipes Cress, Humphrey's Peak and Oak creek, several speci- 

 mens in each locality, 

 vulgaris Cress. Humphrey's Peak and Oak creek, 1 specimen 



in each locality, 

 xanthoptera Cam. Oak creek, numerous specimens, 

 undetermined species. Oak creek, 3 specimens. 

 Pelopaeus cementarius Drury. Congress Junction, Oak creek. Bill Williams 

 fork, and San Bernardino ranch, numerous specimens in each 

 locality, 

 servillei Lep. Congress Junction, Oak creek, Bill Williams fork, 

 and Tucson, several specimens each. 

 Chalybion cseruleum Linn. Oak creek, 1 specimen; San Bernardino ranch, 



3; Tucson, several specimens. 

 Chlorion casruleum Drury. Congress Junction, Oak creek. Bill Williams fork, 

 San Bernardino ranch, Tucson, and Baboquivari, numerous speci- 

 * mens in each locality. 



Isodontia azteca Sauss. Oak creek, numerous specimens; Baboquivari, 2. 

 Sphex ashmeadi Femald. Bill Williams fork, numerous specimens; Con- 

 gress Junction, 1; San Bernardino ranch, 3; Tucson and Baboqui- 

 vari, several specimens. 

 decolorata Blake. Oak creek and Baboquivari, numerous specimens 



in each locality, 

 decolorata Blake, var. baboquivari, several specimens, 

 ichneumonea Fabr. Oak creek, abundant specimens; Humphrey's 



Peak, at base, 1 specimen; Baboquivari, 3. 

 lucae Sauss. Oak creek, 5 specimens; Tucson, 2. 

 pennsylvanica Linn. Oak creek, abundant specimens. 

 Sceliphron texanum Cress. Oak creek, 2 specimens. 

 Harpactopus abdominahs. Oak creek, 4 specimens. 



rufiventris Cress. Oak creek, 7 specimens; San Bernardino 

 ranch, 1 specimen. 

 Parasphex ferrugineus Fox. Congress Junction and Bill Williams fork, 3 



specimens at each camp. 

 Prionyx striatus Smith. Bill Williams fork, 6 specimens; Baboquivari, 1, 

 thoma3 Fabr. Oak creek, abundant specimens; Bill Williams fork, 

 2; San Bernardino ranch, 1; Baboquivari, several specimens. 



