38 



SCIENCE- G OSSIP. 



(fig. 6). In Aponomma, Amblyomma, and Hya- 

 lomma it contours the anus behind and is open to 

 the front (fig. 7). 



There is close affinity between Ixodes and 

 Haemalastor ; in fact, there is no fundamental 

 characteristic to separate the females of the two 



Fig. 8. Rostrum, coxa, and tarsus of 2. redv.vius. Hale. 



genera ; the great length of the legs, a deflected 

 direction of the rostrum, and the habit of living 

 in holes and caverns alone give presumption for 

 placing a female specimen in Haemalastor rather 



Fig. 7. Hydlomma affine. 



than Ixodes. The males, however, differ entirely 

 in the form of their palpi, which, flat and cani- 

 culated on the inner margin in Ixodes (figs. 8, 9), 

 are boldly claviform in Haemalastor (fig. 10). 



The affinity between Aponomma, Amblyomma, 

 and Hydlomma is greater still. The absence of 

 eyes, as in Aponomma, appears a character easily 

 distinguishable; but in some of the Amblyomma 

 to find the eyes requires extreme attention, as they 

 are neither prominent nor distinct in colour. 



There is no definite distinction between the 

 females of Amblyomma and Hyalomma, but it is 

 otherwise with the males, which in Hyalomma are 

 provided with ad-anal shields (fig. 7), which are 

 wanting in Amblyomma. 



Fig. 9. Rostrum, coxa, tarsus, ami carunda of I. red "this. 

 Female. 



