94 



GUIDE TO CALIFORNIA INSECTS. 



ANDRENID/E. 



The Andrenidse are among the smallest of the bees. They are often semi- 

 social, many living in a common burrow but within which each maintains 

 its own quarters. 



SYNOPSIS OP G (ilNERA. 

 Halictus: color not metr.llic Andrenna: basal vein bent. 

 Agapostemon. Augochlora: second recurrent from tiiird submarginal cell. 



perimelas Co. 



pertristis Co. 



phenax Co. 



stanfordiana Co. 



subtristis Co. 

 Auglochora pura (Say). 

 Chloralictus incompletus — Halictus. 



nevadensis — Halictus. 



punctativentris — Halictus. 

 Conanthalictus bakeri — Halictus. 

 Evylaeus latifrons — Halictus. 



nigrescens — Halictus. 



robusta — Halictus. 

 Halictus bakeri Cra. 



farinosus Sm. 



gracilis Rob. 



incompletus Cra. 



latifrons Cra. 



longicornis Cra. 



mellipes Cra. 



nevadensis Cra. 



nigricens Cra. 



punctativentris Cra. 



purus — Augochlora. 



robusta Cra. 

 Nomia nevadensis Cr. 



tegularis Rob. 

 Panurgus chalybea — Andrena. 



Figure 71. Andrenna. 



Agapostemon femoratus Craw. 



texanus Cr. 

 Andrenna chalybea (Cr.) 



foxii Co. 



griseonigra Co 



hesperidus Cr. 



knuthiana Co. 



Aphilanthops elsiae Dun. 



foxi Dun. 

 Cerceris aequalis Prov. 



californicus Cr. 



cockerelli Vier. 



flavocinctus — Eucerceris. 



SPHECINA. 



PHILANTHID/E. 



Eucerceris flavocinctus (Cr.) 



insignis Prov. 

 Philanthus californicus Cr. 

 crabriformis Sm. 

 subsimilis Cr. 



STIZID/E 

 specius — Stizus. speciosus Drury. 



Ammatomus noneduioides (Pack.) Hoplisoides umbonatus Cam. 



Gorytes monoduloides — Ammatomus. Hypomellinus flavicinctis Cam. 

 Sphecius convallis — speciosus. Sphex speciosus — Sphecius. 



