certain Uganda areas, A. cohaerens, together with A. variegattim , 

 is the predominant cattle tick on old buffalo grazing grounds 

 (Richardson 1930). It would be interesting to know how long the 

 buffalo tick remains in an area as a cattle parasite after its 

 chief host has been exterminated. 



Other animals are rare hosts of adults. Elephants (Robinson 

 1926), Tortoise, and domestic sheep and goats (Mettam 1932). 

 Eland (Lewis 1934, Weber 194-8). Warthog (Theiler, unpublished). 

 Black rhinoceros (Hoogstraal 195^. Also 2cS:? removed from a 

 Tanganyika rhinoceros skin by a taxidermist _ CNEM collections). 



Hosts of nymphs (tentatively identified as this species) 

 are groimd birds and a tree rat (Eqxiatoria Province records above). 

 Dozens of Thaoomaoigys tree rats have been examined by me in the Sudan 

 and Kenya without finding other ticks on them. Several nymphs have 

 been taken from a warthog near Lake Edward, Uganda, by Lt. Col. 

 Don Davis, U.S.A. (HH collection). 



BIOLOGY 



Unstudied, In Ruanda-Urundi , A. cohaerens occtcrs as high a^ 

 2200 meters altitirie (Schoenaers I^IB, as A. hebraeum). 



DISEASE RELATIONS 

 Unstudied, 



REMARKS 



Sections of the rnouthparts of A, cohaerens have been illus- 

 trated by Schulze (1936A), who also~illustrated the form of haller*3 

 organ (l94l), and (195QA) discussed the dentition of this species. 

 Schiilze also (1932C) utilized this tick to illustrate his concept 

 of the relation of ornamental design to location of muscle attachu 

 ments. A number of other remarks and illustrations concerning the 

 exoskeleton of this species are presented in the same stvidy. 



_ 213 - 



