14 
10. 
lal? 
12. 
13. 
14. 
SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 
. Larger, abdomen not banded; males (Los Angeles) 
Re Aiko, 2 eee Cm Emphoropsis floridanus (Smith) 
Smaller, abdomen not banded; males (Bear Valley, 
Los Angeles, Tehachapi) .Anthophora urbana, Cress. 
. Marginal cell much shorter than the first discoidal; 
Leribe GS eee ae ae be 5 tee Anthophora urbana, Cress. 
oVrarcinalscellenotesom.. 0. foe ke ene ee 6 
. Size small; end of marginal cell far from costa; fe- 
maleseaCWos Amoeles) 7195. Wan ne ee 
ler A 
SIE OTs ye Pree eet Rec ths 204 leat ky Oe 7 
. Hair of face black; males (Los Angeles, Banning). . 
oe Rule cnaee Tame ce nae nT Diadasia nerea, Fowler 
Hairy ob tage mot blacks 224k seh eases. hie. eee 8 
. Males; apex of abdomen bituberculate.......... 9 
emialesr yee note oe ae oes ene slant i ee 10 
. Large, abdomen banded (Los Angeles, Rock 
Creek) ere Rhea aeten es Diadasia cinerea, Fowler 
Smaller, abdomen not, or not distinctly, banded 
(GBeAIUI IO aten st eee ae ay elles a ae Diadasia sp. 
Scopa on hind tibiae and tarsi black (Los Angeles). 
Saag wos eee see Diadasia (? female of cinerea) 
Scopasonm, hind tibiacvand: tarsiqliohta: = 4-...--eeee fal 
Abdomen with broad white bands on segments 2 
to 4 (Los Angeles, Lanecaster)..... ee 
ti at 8 Sy pe er ray Synhalonia fowleri, Ckll. 
Facial quadrangle broader than long; size larger .13 
Facial quadrangle about square; size smaller....14 
First recurrent nervure joining end of second sub- 
marginal cell (Rock Creek)......... Melissodes sp. 
First recurrent nervure joming second submarginal 
cell much before end (Los Angeles)......... 
GE Acsleghisc 8 5 Stato Sete Xenoglossa davidsoni, Ckll. 
Larger: tegulae ferruginous; no black hair on thor- 
acic dorsum (Los Angeles, Palm Spring).... 
disc HR Net CRM Get aoe te ean ee a Diadasia rinconis, Ckll. 
Smaller) teoulaewwaanker ses eo! occ. nya cL ee eee 15 
5. Thoracic dorsum with black hair (often rubbed off) ; 
size larger (Redondo, Catalina I.)...Melissodes sp. 
Thoracic dorsum without black hair; size smaller 
CRalime Spree e Diadasia diminuta (Cress.) 
