1911] Cockerell—Bees of the Genus Perdita 143 



Townsendi Cockerell 1896. White Sands, New Mexico (Town- 

 send). Tab. 2, 4. Visits Chrysothamnus. Also found at 

 Embudo, New Mexico. 



Trisignata Cockerell 1896. California. Tab. 1. Wings yellow- 

 ish; abdomen without markings. 



Utahensis Cockerell 1896. Southwest Utah (Palm). Allied to 

 P. albipennis. 



Vagans Cockerell 1896. Las Cruces, New Mexico (Cockerell). 

 Tab. 1, 2. Visits Ximenesia. 



Ventralis Fox 1893. Margarita Island, Lower California 

 (Haines). Tab. 1. Flies in March. 



Verbesinae Cockerell 1896. Las Cruces, New Mexico (Cockerell). 

 Tab. 1, 2, 4. Visits Ximenesia. 



Verbesinae cyanella Cockerell 1896. Las Cruces, New Mexico 

 (Cockerell) . Male variant. 



Verbesinae intermedia Cockerell 1896. Las Cruces, New 

 Mexico (C. Rhodes). Female variant. 



Verbesinae maculata Cockerell 1896. Las Cruces, New Mexico 

 (Cockerell) . Male vq,riant. 



Verbesinae nigrior Cockerell 1896. Las Cruces, New Mexico 

 (Cockerell) . Tab. 1, 2. Female variant. 



Vespertilio Cockerell 1896. Las Cruces, New Mexico (Cock- 

 erell). Tab. 1, 2. Visits Chrysopsis. Female; Entomologist 

 1906, pp. 148-149. 



Vierecki Cockerell 1907. Alamogordo, New Mexico, April and 

 May (J^iereck). Related to P. exclamans. 



Wilmatt^ Cockerell 1906! Florissant, Colorado (W. P. Cocker- 

 ell). Visits Phacelia alba. 



Wootonae Cockerell 1898. Near Tularosa, New Mexico (E. 0. 

 Wooton). Tab. 2, 3, 4, 6. Visits Nnttallia. Also occurs in 

 Colorado and Nebraska. 



Xanthismae Cockerell 1905. Goldthwaite, Texas (Crawford). 

 Tab. 5. Visits Xanthisma. 



Xanthismae sideranthi Cockerell 1906. Ennis, Texas, Sep- 

 tember (Bishopp). Visits Sideranthus and Isopappus. 



Zebrata Cresson 1878. Colorado (Ridings and Morrison). 

 Tab. 1, 2, 3, 4. Visits Peritoma. 



Zonalis Cresson 1879. Nevada (Morrison). Tab. 1. 



