Amblyomma cohaerens, A. lepidum, A. marmoreum (group)867

Amblyomma nuttalli, A. pomposum, A. rhinocerotis.....868

Amblyomma tholloni, A. variegatum.

..868

Page

.878

Hyalomma sp. no. I near excavatum.

..881

Hyalomma sp. no. 2 near excavatum.

..885

..887

...889

..890

...890

.892

..895

.896

..899

Rhipicephalus appendiculatus..

906

Rhipicephalus compositus, R. cuspidatus.

...908

..908

Rhipicephalus e. evertsi, R. longus, R. muhlensi

....909

Rhipicephalus pravus, R. s. sanguineus

Rhipicephalus simpsoni.

Rhipicephalus s. simus, R. s. senegalensis.
Rhipicephalus supertritus, R. tricuspis..

BIBLIOGRAPHY.

910

.911

911

.912

MAPS AND ILLUSTRATIONS

Subdivisions of Ethiopian Faunal Region...... 22
Political Divisions of Africa...

24 The Sudan. Principal Collecting Sites....... 25 Ixodidae. Key Morphological Characters...... 38

ARGASIDAE

Key Morphological Characters 0. savignyi)... 50
Key Morphological Characters (0. savignyi

ARGAS

savignyi)... 51

Key Morphological Characters...

IX 27-30

X 31-32

Peripheral and Lateral Differences..

A. (Argas) persicus and A. (Argas) reflexus.. 58
A. (Ogadenus) brumpti..

A. (Chiropterargas) boueti.

A. (Chiropterargas) confusus
A. (Carios) vespertilionis.

...103