XXX 



PLATE 



LXVIII. 



LXIX. 



LXX. 



LXXI. 



LXXII. 



LXXIII. 



Fig. 5. 



Fig. 1. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



Fig. 7. 



Fig. 1. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 1. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



Fig. 1. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



Fig. 7. 



Fig. 1. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



Fig. 1. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



FACING PAGE 

 Vertical longitudinal section through the 



head of same ... ... ... 538 



Pedicinus eurygaster, female. 



Haematopinus tuberculatus, female. 



Haematopinus suis adventicus, female. 



Haematopinus stephensi, female. 



Sternal plate of Haematopinus latus. 



The same of Haematopinus stephensi. 



The same of Haematopinus tuberculatus. 549 



Pediculus vestimenti, larva. 



Pediculus vestimenti, first nymph. 



Egg of same. 



Pediculus vestimenti, second nymph. 



Pediculus vestimenti, female ... ... 551 



Anterior end of mid-gut of Pediculus ves- 

 timenti. 



Cells near the oesophagus. 

 Cells of the mid-gut in transverse section. 

 Transverse section through the hind-gut. 

 Transverse section through anterior lobes 



of mid-gut. 

 Alimentary canal of same ... ... 556 



Reproductive organs of Pediculus vesti- 

 menti, female. 



Proboscis of same. 



Chitinous framework of sucking apparatus 

 of same. 



A cell of the fat body. 



Transverse section through the hind-gut 

 of same. 



Edge of maxilla of Pediculus vestimenti. 



Reproductive organs of Pediculus vesti- 

 menti, male ... ... ... 559 



Hyalomma aegyptium, male, dorsal view. 

 Amblyomma crenatum, male, dorsal view. 

 Hyalomma aegyptium, male, ventral view. 

 Ornithodorus savignyi, female, ventral view. 

 Dorsal view of same. 

 Aponomma gervaisi, female, dorsal view. 570 



Capitulum of Ixodes angustus, female, 

 dorsal view. 



Ventral view of same. 



Capitulum of Aponomma pattoni, female, 

 ventral view. 



Capitulum of Hyalomma aegyptium, fe-l_ 

 male, dorsal view. 



Ventral view of same. 



Capitulum of Dermacentor andersoni, fe- 

 male, ventral view. 



