( 563 ) 



antenna, the long pronotnm, etc. The species of Dinop.v/lli(s differ from Palneo- 

 psi/lla also in some characters which they have in common with Leptopsylla — 

 viz. the comb-like dorsal bristles of the tibiae and the long first segment of the 

 midtarsns — and, ou the other hand, are distinguished from Leptopsi/lla by the 

 non-angnlate frons and the absence of spine-like frontal bristles, besides the pre- 

 vionsly mentioned differences. The species of Dinopsi^llus are at first siglit very 

 uniform in structure, particularly in the modified abdominal segments, and some 

 of them exhibit obvions differences only in the males ; at any rate, we have not 

 been successful in finding the differences in the females of two of the species. The 

 study of Dinopgi/llus, therefore, presents some difficulties. 



Besides the genotype, D. ellobixs, two other species belonging here have been 

 previously described by the jnnior author as Ti/phlopsylla ingens and Cteiwpsi/llus 

 hirsutits. The description of ellnbins was based on a single pair and that of kiisnfus 

 on one female, all in but moderate state of preservation. As we now have a 

 number of species with which we can compare ellobim and hirsutus, it appears 

 desirable to point out the main characteristics in which each known species differs 

 from its congeners. For that reason we propose to enumerate here all the species of 

 Dinop.^i/Uiis with which we are acquainted, whether they were obtained by Mr. Kemp 

 or some other collector. The genus is evidently one of the chief features of the 

 Ethiopian fauna of Siphonaptera. 



The collection made by Mr. Kemp contains no less than eight species, all being 

 new to science. 



30. Dinopsyllus echinus spec. nov. (text-figs. 31 and 32). 



S ?. Tlie largest species fonud by Mr. Kemp. It is at once recognised by the 

 peculiar structure of the derm. The raised lines of the exoskeletou form a network 

 of rather small and in mauy places almost regular meshes, generally hexagonal. 

 On the sides, however, the transverse connections are so thin that the reticulation 

 apjiears to be replaced by dorso-ventral lines only connected irregularly. These 

 lines have the appearance of being densely though minutely denticulated, which is 

 not the case in any other species known to ns. The denticulation is quite distinct 

 even in unmounted specimens. The teeth are the proximal portions of the trans- 

 verse lines, of which the distal portions are not visible in transmitted light. The 

 species greatly resembles in size and general appearance D. hirsutus Roths. (1908). 



Head. — The frons is evenly rounded in tlie 6 aud inclines very little backwards, 

 being broad ventral ly, the distance of the frontal oral corner to the tip of the 

 lowest genal spine being larger than the distance from that corner to the vestigial 

 frontal tubercle. The latter is situated below the centre of the frons. The genal 

 jirocess measured from the tip of the second genal spine is as long as this spine 

 measured from the tip of the third spine. Tlie bristles of the head are essentially 

 the same as in other species of this genus. The maxillary palpus is characterised 

 by the second segment being longer than usual, tlie measurements, which vary to 

 a slight extent, being : c? 24, 22, io, 11* ; ? 25, 25, 15, 22. 



'I'l/orax. — Th(! pronotnm has a comb of thirty-five to thirty-eight s|)inos and 

 three rows of bristles, of which the anterior row is incomplete. The mesouotnm 

 bears dorsally seven to eight rows of bristles, aud has, as in other species, a couple 

 of setifortn spines near the apex internally on both sides. The incfiinotum bears 

 only five rows of liristles. The inelcpinicrum lias from thirty-five to fifty bristles. 



Abdomen. — The basal iibdnrNinal sternite has si'veii brislles in tlie £ and from 



