Siphonaptera from Asiatic Russia. 539 



' hat vor den Ocellen kleine bewegliche Ctenidicn."' The 

 only European species of flea, Ouderaans continues, Avhich 

 conforms to this definition is musculi, Duges. Oudemans, it 

 will be noticed, identifies (without further consideration) 

 the "movable ctenidia" mentioned by Kolenati with the 

 spine-like frontal bristles found in musculi and allies, i. e. in 

 the genus which we call Lepiopsylla. These frontal bristles, 

 however, are by no means the ctenidia of Kolenati's descrip- 

 tion of Ctenophthalmus. The list of species which Kolenati 

 gives as belonging to Ctenophthalmus proves that the 

 " movable ctenidia in front of the ocelli " are nothing else 

 but the genal ctenidia, which are present in all the species 

 Kolenati mentions, while the frontal spiniform bristles are 

 found only in the one species to which he refers as talpce. 

 Moreover, the whole context shows clearly that Cteno- 

 2jhthahnus was meant to comprise all the species with pro- 

 notal and genal combs. It was, in fact, a composite genus 

 with a very general definition, and without any fixation of a 

 type. We go even further, maintaining that Kolenati did 

 not know of the existence of the spiniform frontal bristles of 

 musculi, Duges. He does not mention them anywhere, nor 

 are they indicated in the figure which he gives of musculi 

 (1863). We consider, therefore, Oudemans' action as 

 being based on an erroneous premise, and shall continue to 

 use, as did Kolenati in his later papers, the name Cten- 

 ophthalmus for bisoctodentatus and allies. 



It may be mentioned in passing that Oudemans is also in 

 error when stating that musculi is the only European species 

 with " movable ctenidia in front of the eyes " in Oudemans' 

 sense. There are several such species in Eui'ope, one of 

 which (hidentalus, Kolen. ) = monoctenus, Kolen., = snbrinus, 

 Roths.) was already known to Kolenati besides musculi. 



1. Ctenophthalmus dolichus, sp. n. 

 (PI. XIV. figs. 1, 2.) 



$ $ . — A near ally ol Ct. caucasica, Tasch. (1880), but at 

 once distinguished by the longer bristles of the hind tarsus 

 and by the modified abdominal segments. 



The pronotal comb contains fourteen spines. The longest 

 apical bristle of the hind tibia extends to the apex of the 

 first tarsal segment or beyond, the corresponding bristle of 

 this segment reaching to the apex of the second segment, 

 and the second segment has three apical bristles extending 

 beyond the apex of the fourth. Several of the other bristles 



3b* 



