1897.] NATURAL SCIENCES OF PHILADELPHIA. 353 



black ; the wings somewhat dusky ; the hind femora more pro- 

 duced below, the angle resulting less than a right angle. 



Hab. — Olympia, Wash., May 10th ; also April 25th, at Fragaria 

 (T. Kincaid). I have also before me a couple from Seattle, Wash., 

 May 13th, from Mr. Dunning, marked " Lot 214." 



The two species described above differ at once from dupla and 

 tejonensis in the $ , by having the abdomen terminated by a point ; 

 the last ventral segment in both tejonensis and dupla is broadly 

 rounded at the end. At one time I thought nanula might be C. 

 strenua Smith, but that cannot be, as Smith expressly states of 

 strenua, " seventh segment rounded at the apex." 



As regards the females, the distinctions are not so obvious. I 

 have what I suppose to be females of nanula from Juarez, Las 

 Cruces and Santa Fe, New Mexico; but except in being smoother 

 and more shining (like the $ ) they do not appreciably differ from 

 dupla, and it may well be that some of the larger examples (81 mm. 

 long, Sta. Fe, July) belong really to dupla, though of this I cannot 

 be sure until $ dupla has been caught at Sta. Fe. 



The 9 of C. submaritina, which Mr. Kincaid took in some num- 

 bers at Olympia, Wash., differs at once from the supposed 9 of 

 nanula in having the clypeus entirely dark, or at most with a very 

 small and obscure spot. C. acantha Prov., from Los Angeles, Calif., 

 is described only from the 9 ; it is too small for submarithna, its 

 clypeus is said to have a median testaceous line. 



Perdita sidae n. sp. 



$ . Length 4t to 5$ mm. Head and thorax very dark metallic 

 blue, obscurer and more inclined to greenish on mesothorax and 

 scutellum, shining ; the white pubescence moderately abundant. 

 Head large, subquadrate, broader than thorax, and considerably 

 broader than long ; cheeks unarmed, but occasionally produced be- 

 low into a prominent angle or incipient tooth. Clypeus broad and 

 low, of the Panama-hat type ; mandibles, except their dark tips, 

 labrum, and face up to the level of antenna? light yellow; supi'acly- 

 peal yellow area broader than long ; upper limit of the yellow im- 

 mediately lateral to the an tenure not as high as the top of the 

 supraclypeal mark, but only reaching to the lower level of the 

 antennal sockets, but rising as it approaches the orbit, to end at an 

 angle of about 45° slightly above the upper level of the antennal 

 socket. Antennoz wholly deep orange ; ocelli in a curve. Front 

 above level of antenna? with tolerably sparse but very distinct punc- 



