PLATE LXXV 



Figure 1. Larva of Argas persicus. X 40. 



Figure 2. First nymph of Ornithodorus savignyi. X 24. 



Figure 3. Larva of same, x 30. 



Figure 4. Stigmal plate of Dermacentor vennstus, $ . Note 

 the broad aperture, prominent terminal prolongation 

 and the scattered pores ; greatly enlarged, after Stiles. 

 Dermacentor venustus, Marx, as interpreted by 

 Stiles includes venustus, Marx, and andersoni, Stiles. 



Figure 5. Stigmal plate Dermacentor rettculatus, $ (France). 

 Note the elongate form of the plate ; the aperture is 

 also elongate and situated more towards the interior 

 end (head). The pores are numerous and thickly set 

 around the aperture ; greatly enlarged, after Stiles. 



