THE CANADIAN ENTOMOLOGIST. 



and bluntly conical. The primaries have the costa arched basally ; ihe 

 cell nearly two-thirds the length of the costa ; the discocellulars strongly 

 oblique, the upper one twice the length of the lower, and the latter some- 

 what shorter than the third median segment ; lower radial depressed 

 basally ; first branch arising slightly beyond middle of median nervure, 

 and the second shortly before lower cell angle. Secondaries slightly lobed 

 at anal angle ; the discocellulars weak. Body rather slender. Middle 

 tibiae conspicuously spined ; hind tibiae with two pairs of spurs. A narrow 

 oblique band on primaries of males, extending from base of second median 

 branch to the middle of the submedian nervure. 



In addition to the three species above mentioned, Paynphila phylace 

 Edwards (Field and Forest, Vol. 3, p. riy, 1877) falls in this genus. 

 Dyar, in his " Review of the Hesperidae of the United States," Journ. N. 

 Y. Ent. Soc, Vol. XIII, p. 133, 1905, gives the following synopsis of the 

 genus Mast or : 



Head and collar golden, fringes sordid pale phylace. 



Head, collar and fringes golden bellus. 



Mastor phylace Edwards. — Originally described from Colorado, and 

 has since been recorded from Arizona and New Mexico. Little seems to 

 be known of it. 



Mastor bellus Edwards. — Published in Papilio, Vol. 4, p. 57, 1884, 

 from specimens taken by Morrison in Southern Arizona. Dr. Barnes, 

 Ent. News, Vol. Xf, p. 331, 1900, writes that " A number of specimens 

 of this species taken this year in the Huachuca Mountains, are, I believe, 

 the first taken since Morrison got the types many years ago." Godman 

 and Salvin, however (1893), reported it from Las Vigas and Milpas, in 

 Durango, Mexico. 



During the past season I found bellies one of the most abundant 

 species of butterflies occurring in the Huachuca Mountains, of Cochise 

 County, Arizona. My first specimen was taken on May 25. From May 

 27 on it appeared more and more commonly until about the middle of 

 July, when it gradually disappeared. It is two-brooded, the second 

 normally appearing towards the last of July. Bellus does not appear to 

 be restricted by elevation, as I took examples at less than 5,000 and at 

 over 8,000 feet. June 21, at 7,800 feet, I observed a female ovipositing, 

 and secured three eggs. They were laid on the ventral surface of blades 



