( 313 ) 



of hairs, in addition to those of the postmedian row (fig. 1 , ah'). The seventh tergite 

 bears one long and two ver}- short hairs. The aladominal sternites of the male bear 

 two bristles, while those of the female have three or four. The longest apical 

 bristle of the foretibia on the ventral surface reaches beyond the base of the third 

 tarsal segment ; that on the dorsal surface, however, reaches to the apex of the 

 segment. The first segment of the midtarsns is fully twice as long as it is broad. 

 The anterior part of the hiudcoxa bears numerous long hairs, the comb on it 

 consisting of seven spines. The hiudfemur is completely rounded ventrally near 

 the base, and not angulate. It bears two subventral bristles near the apex on the 

 outer surface, and a subventral series of five or six bristles on the inner surface. 

 The hindtibia (tig. 3) bears four jiairs of bristles. The longer bristle of the fourth 

 pair, situated at the hinder edge of the tibia, reaches far beyond the apex of the 

 tibia. Of the subterminal pair, the longer bristle is as long as the tibia is broad 

 at the end, being much longer than in cleopatrae. The longer dorsal terminal 

 bristle reaches far beyond the tip of the first tarsal segment. The first segment 

 of the hindtarsus (fig. 3) is distinctly longer than the second. The fourth 

 segment is short, being scarcely double its own breadth. The longest terminal 

 bristle of the first segment of the hindtarsus reaches to the centre of the third 

 segment, while the longest terminal bristle of the second segment reaches beyond 

 the claw (fig. 3). The eighth sternite of the male bears one bristle situated beyond 

 the middle, and another before the apex. The movable finger is rather large, 

 obtuse, and bears a number of bristles on its dorsal edge near the apex, and several 

 very long ones on its ventral edge (fig. 7, F). The ninth sternite (fig. 7, st) 

 is similar to that of P. cleopatrae. The internal plate of the penis (fig. 4) is broad, 

 straight above, somewhat rounded at the end. The eighth tergite of iha female 

 (fig. 9) bears three long proximal bristles, which are about equidistant from one 

 another and the stigma. The eighth tergite also bears a series of five bristles 

 a very short distance from the apical edge, and six or seven bristles at the edge. 

 The subapical series is continued ventrally by three more bristles. In addition 

 to these three bristles, and on a level with the first of them, there are two more 

 proximal hairs. 



Length : i, 1-42 mm.; ¥, 1-85 mm. 



Messrs. Erlanger and Neumann secured nineteen specimens (nine SS and 

 ten ? ?) of this species in South Arabia from Aleiiones rex on December 26th, 

 1S99. 



2. *Pulex isidis spec. nov. 

 (PI. V. figs. 2. 5. 6. 8.) 



The head of the male is horizontal above, but very strongly rounded in front. 

 That of the female, however, is almost evenly rounded from the mouth to the 

 binder edge. The palpi are shorter than the rostrum, which reaches to the end 

 of the forecoxa. The epimerum of the mesosternum (fig. 2, epms) bears four 

 bristles, one at the anterior edge below the middle, the second placed posteriorly 

 near the upper edge, and two very close together at the oblique hinder edge. 

 Of these last, the ujjper one is long, while the lower one is short. The epimerum 

 of the metathorax (fig. 2, ej/ml) liears four bristles near its hinder edge, the most 



• The type bpccimen, a (J, is dated Nuvember let, I'JOO, aud was taken fium Procavia erlangeri at 

 Eiiiar. 



