492 Mr. T. D. A. Cockerell on new Species 0/ Perdita. 



The two species, P. syriacus and P. Bottae, have already 

 teen sufficiently well defined by Pictet and Humbert (op. cit.), 

 and an imperfectly defined larger species, P. grandis, is 

 described by J. W. Davis (Trans. Boy. Dublin Soc. [2] 

 vol. iii. (1887), p. 510, pi. xxviii. tig. 4). An examination of 

 the original specimen of P. longispina, Davis (loc.cit. p. 511, 

 pi. xxv. fig. 2), convinces me that it does not belong to this 

 genus, but is referable to an entirely distinct fish commonly 

 known as Clupea Bottce, Pict. & Humb. Pseudoberyx has 

 hitherto been found only in the Upper Cretaceous of Hakel, 

 Mount Lebanon. 



LXVIII. — Four new Bees of the Genus Perdita collected by 

 Dr. L. 0. Howard in Mexico. By T. D. A. COCKERELL, 

 New Mexico Agricultural College. 



Perdita Hoivardi, sp. n. 



$ . — Length about 6 millim. 



Bright lemon-yellow ; tips of mandibles darkened ; frontal 

 fovea a black stripe ; a narrow black line extending from 

 each lateral ocellus to the adjacent eye ; abdomen with four 

 narrow entire black bands at the sutures between the seg- 

 ments ; second abdominal segment with a longitudinal black 

 stripe on each extreme side ; pleura without any black patch ; 

 tarsi more or less fuscous ; stigma faintly tinged with yel- 

 lowish ; nervures colourless ; marginal cell obliquely trun- 

 cate, its substigmatal and poststigmatal parts about equal 

 in length ; second submarginal cell narrowed rather more 

 than half to marginal ; third discoidal distinct. Head 

 ordinary; lower part of face pellucid white; mesothorax 

 naked, a very narrow black line along its anterior margin ; 

 tegulaj colourless, transparent. 



£ . — Frontal fovea a black dot ; no line from the ocelli to 

 the eyes ; abdominal bands more obscure ; otherwise like the 

 female. Claws cleft. 



Bah. S. Jose de Guaymas, Mexico, April 10, 1898 (L. 0. 

 Howard) . 



It is a pleasure to name this beautiful species after its well- 

 known and esteemed discoverer. P. Howardi, by its yellow 

 colour and the absence of a black patch on the pleura, comes 

 near to luteola, from which it is easily distinguished by 

 the abdominal bands. It is also a vernal species, whereas 

 luteola is autumnal. Seven specimens were obtained. 



Perdita Ashmeadi, sp. n. 

 ? . — Length about 4^ millim. 



Head and thorax shining dark olive-green ; abdomen 

 flattened, very dark brown above, without marks, dull 





