( 370 ) 



broad proximally and gradually tapers to a i)oiut distally, the dorsal margin being 

 slightly incurved and the ventral margiu gradually rounded. This sternite bears 

 numerous small bristles, as shown iu the figure. The anal segment is separated 

 from tlie pygidium liy a distinct suture, the tergite being convex in the centre 

 and bearing here a number of long bristles. 



? . The modified segments of this sex are very interesting. The seventh sternite 

 bears eight or nine bristles on each side, and is divided by a deep and very narrow 

 sinus into two lobes (PI. XI. fig. 16). The upper lobe, which is incomplete in our 

 specimens, is strongly chitiuised, with the ridges unusually prominent. It is un- 

 doubtedly rounded at the apex when in a perfect condition. The lower lobe is much 

 narrower and tapers to a point (lateral aspect). The eighth tergite has no bristles 

 above the stigma, but bears two or three below it, the lower one of them being long. 

 The ventral lateral portion is divided by a narrow apical sinus, much as in 

 Steiioponia tripectinata Tirab. (1902), and bears above this sinns two long bristles 

 on the enter surface and four shorter ones on the inside. The outer surface, 

 moreover, has a subventral row of five long bristles and above this row five more 

 bristles. The anal tergite is not divided by a suture from the very strongly convex 

 pygidium, but is also convex in the centre as in the cj and bears here long bristles. 

 The stylet is slender, being four times as long as it is broad and about equal iu 

 length to the third hind-tarsal segment. The rece[)taculum seminis (PL XI. fig. 1() 

 rec.) is characterised by the head not being much wider than the beginning of the 

 tail, and the apex of the tail being strongly chitinised and separated from the rest 

 of the tail by a constriction. 



Length (mounted specimens): S 1-7 mm., ? 2-2 ram. 



1 (S and 2 ? ?, from Khenchela, off Merioncs shaici, early May 1912. 



1 ?, from Guelt-es-Stel, off Merio/tes shawi, late April 1912. 



11. TypMoceras poppei Wagn. (1902). 



T.2). Wagner, llur. Sm-. Ent. Ross, xxxvi. p. 104 (VM->) (Vegesack, near Bremen). 



The species, which appears to be widely distributed in the western portion of 

 the Palaearctic Region, does not seem to vary geographically. The specimens from 

 Algeria agree with those we have from England and Germany. 



A noteworthy peculiarity of this interesting species is the position of the 

 antejiygidial bristles. These are placed on elevated and strongly chitinised sockets 

 which are placed some distance from the apical edge of the segment, as in Pulex 

 and allied genera. In Cte/wphthalmus, Ceratoplti/Uus, etc., in fact, in the majority of 

 Siphonaptera, the seventh tergite is sinuate posteriorly to the autepygidial bristles, 

 60 that their sockets are jilaced at the hind-margin of the segment. 



1 ? from Alger, taken oS Mas algirm on April 1, 1912. 



1 ? )! ,, „ ,, Apodemus syhatictis on March 21, 1912. 



12. Leptopsylla algira spec. nov. (PI. XII. fig. 17, IS, 19). 



£??. A species with three genal spines, as in />. ^asc^e«Aer^? Wagn. (1898), 

 from Enroi)e, and L. aetliio/iicus Roths. (1908), from Tropical Africa, but differs 

 in the smaller number of teeth in the pronotal comb and the modified abdominal 

 segments of both sexes. 



