APHANIPTERA. 33 
This flea is described by Taschenberg as being short and thick, and 
yellowish-brown, easily recognisable by the blunt edge with which the 
vertex passes into the forehead (“leicht kenntlich an der stumpfen 
Kante, mit welcher der Scheitel in die Stirn iibergeht”). On the 
under edge of the head stand out from the front to the antennal 
sockets, on each side, five to six black, blunt spines, and the pronotum 
also bears the same number on its posterior edge. The abdominal 
rings have each one row of hairs in their centres. The eye is equally 
distant from the top and bottom edge of the head ; some bristles are 
observable in front and behind it. In the anterior legs the four first 
joints are equally short and thick, the fifth somewhat exceeds the 
third in length (? “das fiinfte etwa von der, Linge der drei voranf- 
gehenden”). In the middle pair, joints three and four like each 
other, short and thick, the first a little longer, second and fifth more 
slender, and second a little shorter than fifth ; in posterior pair joints 
three and four are short and resemble each other, and together are as 
long as joint two or five, each of which is a third as long again as the 
first joint. Body length 2 mm.* It is found also on hares. The 
same as J. leporis. 
Pulex fasciatus, Bosc. ‘This resembles Sciusorum, but is longer and 
paler. The pro-thoracic comb has eighteen teeth. No black spines 
on the head. Found on the rat. 
Genus 2.—HYSTRICHOPSYLLA, Tasch. 
Head truncate in front; eyes wanting. Cheeks and clypeus 
densely spinose, and also some of the abdominal segments. The 
whole body furnished with extremely numerous bristles and hairs. 
Pulex talpe, Bouché. 
HT, obtusiceps, Ritsema= ; Pulex fasciatus, Lat. (?) 
Ceratophyllus talpe, Curtis. 
General colour ferruginous and shiny; head also shiny; the 
clypeus covered by dark bristles, which hang down and cover the 
mouth. ‘Thorax small and cylindrical; pro-thorax dark at the sides. 
Eyes pale, ovate. Antennz ten-jointed; basal joint ovate; the 
remaining joints composed of rings, bristles on one side; on both 
sides of the basal joint. Maxillary palpi four-jointed, the basal joint 
longest. Abdomen compressed, each segment being furnished with 
dark bristles on the posterior margin. In the female the last segment 
is elongated on each side, forming two discs. The apex is marked 
by a number of bristles of large size. 
* “Tnsecten-Kunde,” vol. v., p. 132. 
