432 PROCEEDINGS OF THE NATIONAL MUSEUM. vot..xxvi1. 



Genus H YSTRICHOPSYLLA Taschenberg. 



1880. Hystrlchup.^iiUa Taschenberg, Die Flohe, p. 83. 

 1895. Hystrichupsylla Baker, Canad. Ent., XXVII, p. 186. 



Taschenberg Imsed this genus on the remarkable flea originallj'^ 

 named Pulex talpce by Curtis, which is the oMusiceps of Ritsema (but 

 not the taljxe of Bouche, which is Msoctodentatus Kolenati). The 

 species seems to have been unknown to Kolenati, or he would certainly 

 have given it a separate generic designation. The genus remained 

 monotj'pic until the description of 



HYSTRICHOPSYLLA AMERICANA Baker. 



This species is represented in the collection by a single female col- 

 lected on an Evotoinys &tOvono, Maine, b}' the late Prof . F. L. Harvey. 

 Although evidently congeneric with the European species, it shows 

 very wide specilic difl'erences. The head lacks the flattened, calloused 

 front as illustrated by Tas(;henberg, and the pronotum is ])y far the 

 longest thoracic segment. However, the specimen, figured in ''Die 

 Flohe,"" is a male, whih^ our unique tj^pe is a female. A complete study 

 of both sexes of this species is nmch to be desired. 



Dr. Fletcher has sent to me from Nepigon, Canada, a dried and badly 

 mutilated specimen of a larg(\ totally new flea, apparently of this 

 genus, which presents a still wider divergence. It was taken, I under- 

 stand, on a sandy lake shore, near which its host probably lives. I 

 hesitate to describe it from this material, and yet am loath to leave 

 unrecorded such an interesting addition to our fauna. 



Genus CERATOPSYLLUS Curtis. 



1832. Ceratopsyllus CvRTifg,, Brit. Entoinolug., X. 



1^33. Ora/ops2/M«s Westwood (Ischnopsyllus) Ent. Mo. Mag., I, p. 359. 



1863. Ceratopsyllus Kolenati, Hone Soc. Ent. Ross., II, p. 39. 



1893. Ceratopsyllus Wagner, Hone Soc. Ent. Ross., XXVII, p. 350. 



1898. Ceratopsyllus Wagner, Hone Soc. Ent. Ross., XXXI, p. 580. 



1898. Ceraiojtsylhis Rothschild, Novitates Zoologiere, V, p. 542. 



The species of this genus — the most distinctly marked genus in the 

 Palialdm — are confined to bats. Unquestionably, species belonging 

 here will be found in North and South America. I regret not to be 

 able to record a single one. 



