Siphonaptera from Asiatic Russia. 5-1-1 



bristles. Proximally to the row there are 7 to 12 bristles, 

 and on the inner surface at and near the margin 9 to 12. 



1 cf and 2 ? ? from near Djarkent, Semitchenskoi, East 

 Turkestan, February 11th and 19th, 1912, off a white weasel 

 and Meriones tamaricinus. 



I am not convinced that Wagner was correct in sinking 

 his setosa as a synonym of bidentatiformis (cf. Hone Soc. 

 Ent. Ross. vol. xxxvi. p. 143, 190.2). The original specimens 

 of bidentatiformis, Wagn. (1893), were found by Wagner in 

 the Crimea on Epimys decumauus , the above-mentioned (J 

 being one of these specimens. This example bears on the 

 pronotum on each side a postmedian row of 8 long bristles, 

 in front of this row another of 8 smaller ones, and dorsally 

 some additional small bristles representing a third row. We 

 figure the ninth sternite of this true bidentatiformis (fig. 4). 

 A ? , also received from Professor Wagner, obtained in the 

 Northern Caucasus off Spermophilus, and identified by him 

 as the same species, has a shorter pronotum, which, more- 

 over, bears only one row of bristles, the second (anterior) 

 row being only represented by a few pale dots, which are 

 presumably the grooves of insertion of small hairs. The 

 individual otherwise agrees fairly well with the $ $ described 

 above as teratura. As Wagner states of bidentatiformis, as 

 well as setosa, that the pronotum has only one row of bristles 

 (6 on each side), and as the specimens subsequently identified 

 by him as bidentatiformis came from different countries 

 and hosts, a re-examination of the types appears advisable. 

 Possibly setosa is the same as teratura. 



In Proc. Zool. Soc. Loud. 1911, p. 387, we described as 

 Neopsylla compar another species closely allied to N. biden- 

 tatiformis. In this species, however, the small hairs found 

 in bidentatiformis and teratura on the inner surface of the 

 hind coxa are, partly, replaced by short spines. The ? $ of 

 teratura and compar, as well as the above-mentioned $ re- 

 ceived from Wagner as bidentatiformis, do not exhibit any 

 very striking differences in the seventh and eighth abdominal 

 segments and the receptaculum seminis (cf. Proc. Zool. Soc, 

 Lond. 1911, p. 387, text-fig. 120). 



3. Ceratoplnjllus curvispinus, Miyaj. (1912). 



ParadoxopsyUus curvispinus, Miyaj ima, ubi ? 



Ceratoplnjllus subcacatus, Rothschild, in Clark and Sowerby, Through 

 Shen-Kan, p. 194, no. 1, text-figs. 1, 2 (1912). 



The author of curvispinus has very kindly sent several 

 examples of this species, which proves to he the same as mv 



