64 Genus Ornithodoros 



Body 5x3 mm., oval (lateral borders parallel in the young), tapering 

 anteriorly to a rounded point. Integument thin, with closely crowded 

 hemispherical granulations of unequal size (75 to 100 /i), with some 

 short claviform hairs between them ; large symmetrical discs, of which four 

 in a transverse series across the middle of the dorsum ; another transverse 

 series in a groove which limits posteriorly a dorsal prominence corre- 

 sponding to the capitulum ; a broad undifferentiated margin. No eyes. 

 Venter : well-marked pre-anal groove, concave behind ; post-anal groove 

 midway between the anus and the posterior border; post-anal median 

 groove extending beyond the post-anal, but not reaching the posterior 

 border ; anal frame 230 x 200 fi ; anus with hairs on the valves. 

 Spiracles semicircular (?), 100/* wide. Capitulum free, exposed ven- 

 trally ; palps 1, 4, 2, 3 1 ; numerous pennate hairs on the dorsal surface of 

 the palps and basis capituli ; hypostome resembling that of 0. talaje, a 

 crown of denticles being followed by 2 | 2 files of 5 or 6 stout teeth, then 

 squamiform teeth 3 1 3, then 4 1 4 ; two pennate hairs at the base of the 

 hypostome. Legs medium ; coxae contiguous, the first pair only being 

 slightly granulated ; article 2 conical, the others cylindrical ; tarsi only 

 slightly humped. 



Neumann's description, from which the above is taken, is based on 

 three specimens from Algiers. Pavesi (1884, p. 485) records two 

 specimens, 35 mm. I., found by Doria in the vicinity of Tunis, one 

 from Nemours and two from Marnia(?). Lucas received his three 

 specimens (4 x 25 mm. in size) from the plain of Lake Houbeira, near 

 La Calle. They were found beneath stones where Bufo pantherinus was 

 also in hiding. Karsch's 0. miliaris came from Bengal (type in Berlin 

 Mus., Karsch gives the size at 2'5 x 1*7 mm.). Neumann states that it 

 resembles 0. talaje, but does not possess the lateral expansions of the 

 camerostome. These specimens also differ in the details of the digits of 

 the chelicerae, and in the tegumentary characters of the legs. 



1 The relative lengths of articles. 



