( 3(35 ) 



two or three are small. The seventh abdominal sternite of the ? varies in both 

 subspecies indiviiliially, but there is an obvious JitFerence in the shape of this 

 segment in the two subspecies. The sinns of the segment is shallow and the lobe 

 above it short and broad in C. h. Iieiilei/i (PI. VIII. fig. 8, a and b), while in 

 €. k. maxiretanicus the sinns is deeper, the npper lobe longer and the lower lobe 

 (in side-view) also longer and much more pointed (PI. VIII. fig. 9, c and d). 



The modified segments do not seem to present any other dirt'erences. We add 

 that in our original figure of henhyi {Eiitom. 1904, pi. 2), the third bristle of the 

 '' finger " counted from the apex is rather too long. 



We have of mauretanicus ; 



\ S,\ ?, from Khenchela, off Dipof/iilus campestris, May 8 and 9, 1912. 



1 J, 1 ?, from Biskra, ofi' Meriones shawi, March 1908, collected by 

 J. Steinbach. 



8. Ceratophyllus farreni meridionalis subsp. nov. (Pi. IX. tig. 10). 



?. Tlie three Algerian specimens, all females, which we have of C. farreni 

 differ from the British examples in the shape of the seventh abdominal sternite. 

 The sinns of tin's sternite is less deep and also narrower than in C. farreni farreni, 

 and the lobes broader. In Britisli specimens tiie sinns extends more or less close to 

 the row of long bristles, one of the bristles often standing at the edge of the sinus, 

 while in C. farreni meridionalis tlie distance of the apex of the sinus from the 

 nearest bristle equals at least half the depth of the sinus (PI. IX. fig. 10). We 

 figure for com])arison a specimen from Scotland (PI. IX. fig. 11). 



3 ? ?, from Gnelt-es-Stel, taken from nests of Chelidon urbica meridionalis, 

 April 24 and 25, 1912. 



This is the only bird-flea which we met with. The chief interest attaching to 

 C. /. meridionalis lies in the fact that its difference from the northern form confirms 

 the subspecific distinctness of the Algerian Chelidon urbica. 



9. Ctenophthalmus russulae spec. nov. (PI. X. fig. 12 and 13). 



<J ? . Near to Ct. ansori/ei Uoths. (1907), friodontus Roths. (1907), and enffis 

 Roths. (1907), all from tropical Africa, but at once distinguished from all three by 

 the occiput bearing in the middle a single bristle placed above the autennal groove 

 instead of a row of bristles. 



Ct. ansorgt'i was originally described from two ? ? *. We now possess the t? 

 from the same place and host, and tlie genitalia of this sex prove that we were right 

 in placing ansorgei near Ct. caucasica Tasch. (1880). All these species have three 

 genal spines, the eye vestigial, the posterior apical bristle of the labial palpus long 

 and strongly curved forward, the subapical ventral bristle of the hind-fcmnr short 

 and spiniform, and the fifth tarsal segment proviiled with three lateral ventral [lairs 

 of bristles, with an additional pair on the ventral surface in between the first pair. 



Head. — The frons bears an anterior row of five bristles and a posterior row of 

 three long ones. The vestigial eye is less pigmented than in C. an.Horgei. The first 

 spine of the genal comb is sharply pointed. Tlie occijint bears a row of four bristles 



* In Xirv. Ziiiil. 1!I07. p. 330 ami 3:il the figures of Ct. auS'irgei and Ct. triodmilim hr.w been 

 transposed : fig. 2 is trioilnntiiii and fig. 4 ansnrijei, and not vice versa. Tlie same has happened with 

 the outlines of these figures reproduced on I'late 3 of the Knt. Mo. Mag. 1907. 



