1911] Cockerell — Bees of the Genus Perdita 141 



Tab. 1, 2. Visits Pedis, and sometimes Wedeliella and Kall- 



stroemia. 

 Pellucida Cockerell 1896. Las Cruces, New Mexico {Cockerell). 



Tab. 1,2, Visits Isoconia. 

 Perpallida Cockerell 1901. Lehigh, Nebraska, July (Cary). 



Tab. 6. Visits Petalostemon. Close to P. ivootoncp; cf. Ent. 



News, 1907, p. 57. 

 Perpulchra Cockerell 1896. Las Cruces, New Mexico (A. M, 



Holt). Tab. 1, 2. Visits Ximenesia. Male: Annals and 



Mag. of Nat. History, April 1897, p. 398. 

 Phaceliae Cockerell 1898. La Cueva, Organ Mts., New Mexico. 



{Toionsend). Tab. 4. Visits Phacelia. 

 Phymatae Cockerell 1895. Las Cruces, New Mexico (Cockerell). 



Tab. 1, 2. Visits Isocovia and Gutierrezia. 

 Pratti Cockerell 1906. Corpus Christi, Texas, October (F. C. 



Pratt). Probably visits Helenium. Allied to P. crawfordi. 

 Pulchrior Cockerell 1896. Var. of qmlUdior. 

 Punctata Cockerell 1896. Fort Collins, Colorado (Baker). 



Tab. 1.. Visits Solidago. 

 Punctosignata Cockerell 1895. Las Cruces, New Mexico 



(Jessie Casad). Tab. 1, 2. At flowers of Prosopis. 

 Ouadrangularis Cockerell 1907. Alamogordo, New Mexico 



(Viereck). Flies in May. 

 Rectangulata Cockerell 1896. Fort Collins, Colorado (Baker). 



Tab. 1. Visits Solidago in August. 

 Rehni Cockerell 1907. Alamogordo, New Mexico (Viereck). In 



Tab. 1 runs to pallidior, but distinguished by smaller size, much 



darker abdomen, color of antennae, etc. Flies early in June. 

 Rhodura Cockerell 1897. Embudo, New Mexico, September 25, 



(Cockerell). Tab. 2, 4, 5. Visits Chrysothamnus. Resembles 



P. crotonis in the color of the abdomen. 

 Rhois Cockerell 1901. San Diego, California (Cockerell). Visits 



Rhus laurina. 

 Rhois reducta Cockerell 1901. San Diego, California (Cocker- 

 ell). Female variant. 

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



Tab. 1, 2, 4. Visits Salix in May. 

 Semicaerulea Cockerell 1896. San Marcial, New Mexico (Cock- 

 erell). Tab. 1, 2. Visits Covillea. 



