( 55 ) 



These descriptioQs, if li|-erally interpreted, apply to none of the known 

 species of bat-fleas. 



All the specimens from Kolenati's collection which we have examined had 

 five combs, and, moreover, in no specimens were there thirty-one spines in the last 

 comb, as stated in the description of pentactovix, nor had any example a comb 

 of only eight spines on the first abdominal segment. Kolenati's examples belong 

 to two distinct species,* but as the author mentions in the description oi pentacteims 

 that this insect has six bristles before the eye, the name of peiitnctemis must 

 be given to that species which possesses this characteristic. There are two 

 females in the Paris Museum collection, received from Kolenati, which possess 

 the bristles mentioned, and these must therefore be regarded as typical specimens 

 of peiitactenus. 



There is nothing in the description of trti-actemis which would .jnstify ns in 

 applying this name to the second species of live-combed bat-fleas which is repre- 

 sented among Kolenati's specimens. The fact that Kolenati in subsequent papers 

 treated pentactenus and tetractenus as identical is, considering the indifferent 

 descriptions, sufficient ground for treating tetractenus as a synonym. 



The name of the second species is iV. eiisiirca Dampf (19US). In the Paris 

 Museum there are three females received from Kolenati which belong to emarca, 

 in the Berlin Museum one male from Kolenati labelled as tetractenus from 

 Vesperugo discolor and one female, also from Kolenati, labelled as pentactenus 

 without any indication of host. In the Vienna Museum there arc a number of 

 specimens of this species which originated from Kolenati, but further particulars 

 about them are absent. 



4. Nycteridopsylla dictenus Kolen. (1856). 



Ceratnpgyllus dktenuK Kolenati, Puraxit. Chiropt. p. .32. no. h (1856). 



" Lichtgelb, mit zwei Riickenctenidien. Das Ctenidium des Pronotums 24- 

 des Aftersegmentes l'2zahuig, letzteres zweimal nnterbnichen, uach Aussen 

 jederseits zu drei, in der Mitte zu sechs Ziihnen. Die Ocellen gross nnd mit einem 

 brannen Hof umgeben, die Fiihler mit langen Wimpern. 



" Liinge : 0,0026 Pariser Meter. 



"Aufenthalt: Selten am Vesperus discolor aufgefnnden." 



A (J and a ? from the Kolenati collection in the Paris Museum. 



The metanotum and first and second abdominal tergites bear each some 

 spines representing the corresponding combs of pentactenus. The present species 

 is therefore five-combed, with some of the combs being reduced to mere vestiges. 



Kolenati further mentions a flea in Parasit. Chiropt. p. 33, which he maintains 

 in later publications to have also received from a bat. "Der EichhOrnchenfloh 

 Oeratopsyllns sciuri," he says, " ist monoctenus und hat an den Fiihlern nur 

 sine Borste." As several species occur on the squirrel, it is imjiossible to say 

 from this brief note which particular one Kolenati had in view. He himself rejects 

 the name in subsei[nent papers for a new name, hiJentatus {Ilorae Soc. Ent. Ross. 

 1862), for which he supplied a description and a figure. The specimen which 

 served as original for the drawing is among the Kolenati specimens in the Paris 



• Cf. lintmnoloi/ut xlii. p. 27 (IIIUII) 



