/. auritulus 187 



coxa II ; the external spur pointed, slightly longer than broad, almost 

 parallel to the internal ; a short spur at the postero-external angle of 

 the other coxae, much reduced on pair IV. Tarsi long, narrow, tapering 

 obliquely. 



Description based on 3 ? s, from Atoyac, State of Guerrero, Mexico : 

 2 found on Felis onca L., the other on a child. This species, which is 

 called " Conchuda " at Atoyac, is considered to inflict " a bite fatal to 

 children "(A. Duges coll., now in Neumann coll., Toulouse). /. bicomis 

 is very closely allied to /. fuscipes Koch (/. spinosus Neumann). We 

 possess (N. 637) 1 ? from Felis concolor (ex Rothschild collection; 

 no further particulars as to origin) which we refer to this species. 

 Banks (1908, p. 27) may be right in regarding /. bicomis Neumann as 

 synonymous with I. diversifossus Neumann, 1899. In the absence of 

 a figure of I. diversifossus, we would point out that the descriptions 

 differ as follows : 



I. diversifossus. I. bicomis. 



Scutum: 1*3 x 1 mm. 17 x To mm. 



Palps: Article 2 scarcely longer Article 2 one and one-half times as 



than 3. l° n g as 3. 



Hypostome : 2 | 2 or 3 | 3 4 | 4, followed by 3 1 3. 



<-^ O*. 



C ecJi 



17. IXODES AURITULUS Neumann, 1904. 



Figs. 180 and 181. 



Lit., Icon, and Synon. : Ixodes thoracivus Neumann, 1899 ; not Ixodes 



t/wracieiis C. L. Koch, 1844, as described in Neumann, 1899, p. 149. 

 Ixodes thoracicus Neumann, 1899, pp. 149-151, Figs. 22, 24 (reproduced). 

 Ixodes auritulus Neumann, 1904, p. 450. 



Male : unknown. 



Female : Body short oval, swollen, 7 x 5'5 mm., dark reddish brown, 

 legs reddish yellow. Scutum oval, with lateral borders almost straight 

 along their anterior half, 13 x 1 mm., glossy brown in front and 

 on the sides, yellow between the cervical grooves; the latter shallow, 

 almost attaining the posterior border ; lateral grooves indicated by a but 

 slightly prominent thickened border ; punctations very numerous, very 

 fine, equal ; short hairs near the lateral and anterior borders. Dorsum: 

 grooves normal ; some short hairs. Venter : hairs more numerous. 



13-2 



