48 HENRY SKINNEK, EDITOR. 



Osuiia jnxta Cress. 



One 9 , June 29, 1902 (Viereck). 



Osmia nigrifrons Cress. 



Two 9 . June 29, 1902 (Viereck) ; one specimen has some white 

 pubescence on the face, other is typical. 



Monumetha borealis Cress. 

 One % , June 29 (Viereck). 



Megachile sapellonis Ckli. 



Megachile bucephala Cress., not of Sm. Syn. Hym., 1887, p. 302, 9 • 

 Megachile sapellonis Ckll., Ann. Nat. Hist., July, 1900, p. 7, 9 • 



One 9 . Sapello Canon, July 26, two 9 , one at flowers of thistle 

 (W. P. Cockerell). Two 9 /August 18 (T. D. A. Cockerell). 

 Hill W. of Beulah (Crew's Mesa), August 23 (T. D. A. Cockerell). 

 Two 9 , one $ , June 29, 30, 11)02 (Viereck). 



Megachile relativa Cress. 



One % . In addition to the characters given in the original de- 

 scription, the species has the distance between the posterior ocelli 

 less than the distance between them and the nearest eye margin. 

 This character at once seperates relativa from brevis. July 26, 

 August 18 and 25, 9 9 > one at flowers of Polemonium filicinum (T. 

 D. A. Cockerell). Another S on Salix, May 30 (W. Porter). 



Megachile puguata Say. 



Two 9 , hill near Beulah, August 19 (W. P. Cockerell). Three 

 9 , July 26 (W. P. Cockerell). Five 9 , two I , June 29, 30, 1902 

 (Viereck). One % on Helianthoid composite July 11, 1902 (W. P. 



Cockerell). 



Megachile vidua 8m. 



Megachile monardarum Ckll., Ann. Nat. Hist., 1900, p. 11. 



One 9 with the pubescence white, examples from New Hamp- 

 shire; Custer, South Dakota ; Nevada and California almost agree 

 in this respect, while others from Canada, Connecticut, New York, 

 Pennsylvania and Deleware have a decided ochraceous tendency. 

 This observation refers to 9 9 alone, the £ % appear to be more 

 constant in the color of the pubescence. 



Type locality in part of monardarum. Hill near Beulah, August 

 19 (W. P. Cockerell). Two % , one July 16, the other head of 

 Dailey Canon, June 26 (T. D. A. Cockerell). One 9 , June 29, 1902 



