1903] 



COCKERELL: — BEES OF CALIFORNIA 



75 



Dimidrcna is a new subgenus or genus for 

 the blue species of California with only two 

 submarginal cells ; iy^e. chalybaea, described 

 as, a. Pajiurgus. Here also belongs ^.yb.v//, 

 and, I think, A. fheiiax. 



Paraxdrpzxa Rob. 



regularis (Cr.). 

 concinnula Ckll., So. Cal. 

 enocki Ckll., So. Cal. 



Hesperai'Is Ckll. 



eumorpha (Ckll.), near Los Angeles (David- 

 son). 



Halictoides Nyl. 



saundersi Ckll. 



mulleri Ckll. 



virgatiis Ckll. 



davidsoni Ckll., San Gabiiel Mts. 



MiCRANDRENA Ashm. 



pacifica Ashm. (a smallish black species with 

 a large reddish stigma ; detailed descrip- 

 tion not published jet). 



NoMiA Latr. 



Two undescribed species from California 

 are in the National museum, bearing MS. 

 names bj Ashmead. One is near bakeri ; 

 the other near foxii but larger, though not 

 nearly so large as nortotii. 



Spinoliella Ashm. (cf. Ann. mag. nat. hist. 

 Jan. 1901, p. 129). 



edwardsii (Cr.). 

 scutellaris (Fowler), 

 visaliensis (Fowler), 

 anthidius (Fowler), 

 zonalis (Cr.). 

 cincta (Cr.). 



Calliopsis Sm. 



californicus Cr. 

 obscurellus Cr. 



Panurginus Nyl. 



cressoniellus Ckll. 

 albitarsis (Cr.). 



Hylaeosoma Ashm. (cf. Ann. mag. nat. hist. 

 July, 1902, p. 42). 



atriceps (Cr.). 



Perdita Sm. 



claypoiei Ckll., Mt. Lowe. 



rhois Ckll., San Diego. 



rhois reducta Ckll., San Diego. 



californica (Cr.). 



interrupta Cr. 



trisignata Ckll. 



NoMADA Fabr. 



citrina Cr. 



interruptella Fowler. 



obliquella Fowler. 



obscurella Fowler. 



rivalis Cr. 



suavis Cr. 



rubrica Prov. (Fowler makes this a var. of 

 bisignata.1 but Robei'tson has shown that 

 bisignata cannot be certainly recognized). 



crotchii Cr. 



edwardsii Cr. 



melliventris Cr. 



opposita Cr. 



vinnula Cr. 



civilis Cr. 



flavipes Prov. 



erythraea Dalla Torre {rubra Piov.). 



fragilis Cr. 



vincta Say. 



lepida Cr. 



bisignata "Say," Fowler. 



formula Viereck, San Pedro. 



Neopasites Ashm. 



fulviventris (Cr.). 



Epeolus Latr. 



compactus Cr. 

 nigriceps Sm. 



