NO. 1897. BEES OF THE GENUS OSMIA—COCKERELL. 223 



parvula Dalla Torre, 1896. (Name preoccupied.) 



Same as nigritula. 

 pasadense Cockerell, 1910. Pasadena, California (Grinnell). 

 ^pascoensis Cockerell, 1897. Pasco, Washington, May (ICincaid). Tab. 1. 



Female about 15 mm.; hair of head entirely black, except a yellowish-white fringe 

 on occipital margin. 



Paratype. — Cat. No. 6868, U.S.N.M. Not labeled as a paratype by Cockerell, but 

 determined by him. 

 pentstemonis Cockerell, 1906. Florissant, Colorado (Rohwer). Tab. 1. 2. 



Visits Pentstemon. 

 permorata Cockerell, 1910. Steamboat Springs, Colorado (Cockerell). 



Also in New Mexico. Female about 14 mm. long, hair of head and thorax above 

 very bright fox red. 

 phacelise Cockerell, 1907. Ward, Colorado, ^uly (W. and T. Cockerell). Tab. 1. 

 phenax Cockerell, 1897. Mesilla, New Mexico, April (Jessie E. Casad). Tab. 6. 



Ventral scopa pale fulvo-ochreous; tegulse shining rufo testaceous, 

 physariae Cockerell, 1907. Florissant, Colorado, June 1 (Rohwer). 



Male with sixth dorsal segment entire; flagellum very strongly crenulate beneath, 

 pikei Cockerell, 1907. Halfway House, Pike's Peak, Colorado (Cockerell). Tab. 1. 



Visits Salix at end of May. 

 platyura Cockerell, 1911. Mountains near Claremont, California (Baker), 

 pogonigera Cockerell, 1910. Strawberry Valley, San Jacinto Mountains, California 



(Grinnell). 

 *propinqua Cresson, 1864. Fort Crook, California (H. Ulke). Tab. 1. 



Allied to 0. lignaria. Specimens from Claremont, California, are in the Baker 

 collection. 

 *proxima Cresson, 1864. " Maine and Fort Good Hope, Mackenzie River. " Tab. 1. 



Same as atriventris. 

 *prunorum Cockerell, 1897. Mesilla Park, New Mexico, April (Cockerell). Tab. 6. 



Ventral scopa black in middle and yellowish-white at sides. 



Paratype.— Cdit. No. 4344, U.S.N.M. 

 pseudamala Cockerell, 1910. Steamboat Springs, Colorado (Cockerell). 

 Pulsatillas Cockerell, 1907. Boulder, Colorado, April (W. P. Cockerell). Tab. 1. 



Visits Pulsatilla. 

 pumila Cresson, 1864. Pennsylvania. Tab. 4. 

 purpurascens Smith, 1849. Mistakenly supposed to be British. 



Same a.^ lignaria. 

 purpurea Cresson, 1864. "Conn., Penn., N. Jersey." 



Distinguished (female) by the dark purple color and narrow whitish hair-bands of 

 abdomen; ventral scopa black. 

 *pusilla Cresson, 1864. Pikes Peak, Colorado. 



Also in New Mexico. 

 putata Cockerell, 1910. Mountains near Claremont, California (Baker). Tab. 8. 

 quadriceps Cresson, 1878. California (Henry Edwards). Tab. 8. 



Resembles 0. armaticeps, but head (female) not armed beneath, and the pubescence 

 is entirely black, 

 quadridentata Cresson, 1878. New York (Comstock). Tab. 4. 



Male abdomen quadridentixte, the two outer teeth being on sixth segment; front in 

 both sexes with two tubercles, one above the other; ventral scopa white. This 

 is considered to be the male of conjuncta. 

 *ramaleyi Cockerell, 1907. Boulder, Colorado, May (Edna Baker). 



Ventral ecopa orange. Appears to be a variety of 0. hesperella. 

 regulina Cockerell, 1911. Claremont, California (Baker). 



