SPECIES OF ORNITHODORUS 585 



to the coxae, the coxal fold, and the other above the coxae, the supracoxal 

 fold ; there is also a transverse pre-anal groove, as well as a transverse 

 post -anal groove. Eyes are either absent, or present in pairs on the supra- 

 coxal fold ; one pair between coxae I and II, and the other between 

 coxae 11 and 111. (Neumann) 



Neumann gives the following key to the species : 



NEUMANN'S KEY TO THE SPECIES OF ORNITHODORUS 



1 . Integument not granular ........... 2 



Integument granular, especially in the anterior part (nymph), megnini, 



(Mexico; Brazil; United States, Arizona; California; Texas ; Iowa.) 



2. Camerostome without lateral flaps or cheeks ....... 3 



Camerostome with lateral flaps ...... talaje. 



(Brazil; Chili; Mexico; Guatemala; Venezuela; Colombia.) 



3. Last two articles of legs I, II and III with humps on their 



dorsal borders ............ 4 



Last two articles of legs I, II and III without humps 8 



4. Body nearly as broad anteriorly as posteriorly 5 



Body ending anteriorly in a blunt point ........ 7 



5. Last two articles of legs with separated prominent humps .... 6 

 Last two articles of legs with humps prominent and contiguous, pavimentosus. 



(S. Africa, Bethany, Namaland.) 



6. With eyes savignyi. 



Without eyes moubata. 



7. With eyes coriaceus. 



(Mexico ; Paraguay.) 



Without eyes turicata. 



(United States ; Mexico ; Venezuela.) 



8. Integument not granular, but with fine wrinkles . . . lahorensis. 



(India, N.-W. Frontier, Lahore.) 

 Integument granular ........... " 



9. Tarsi not forked 1 



Tarsi with marked terminal fork furcosus. 



(Equador.) 



10. Camerostome prolonged into a cone ' ' 



Camerostome enlarged in front .... megnini. 



11. Tarsi provided with three successive dorsal humps . . . canestrini. 



(Persia ; Caucasus.) 



Tarsi with or without one distal dorsal hump . . .... 1 2 



12. Tarsi attenuated at the end erraticus. 



(Algeria, Tunis.) 



Tarsi with a well marked prominent and pointed dorsal hump . tholozani. 



(Persia ; Caucasus.) 



Aragao has recently described a new species of Ornithodorus, O. rostra- 

 ttts, from the State of Matto Grosso, Brazil, which is not included in 

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