Annals of the Transvaal Museum. 
135 
Genus AMBLYOMMA. KOCH. 
Ixodes (ex. p.), Latreille (1795). 
Amblyomma, Koch (1841). 
Amblyomma, Kocli (Yeumann, 1899). 
Eyes usually flat, slightly salient, sometimes hemispherical, shining, 
in a sub-marginal pit of the shield, liostrum long ; palpi valvate. Anal 
groove semi-circular, opening in front, uniting the sexual grooves ; usually 
no median, ano-marginal groove. Dorsal shield often marked with designs 
in colour. Yo anal plates in the male. Stigmatic plates usually triangular, 
with rounded angles. Yearly always eleven posterior marginal festoons, 
nt least in the male. 
The presence of eyes separates this genus from Ixodes and Aponomma , 
and the absence of anal shields in the male from Ilyalomma. Eyes are 
iound in all degrees of development. Six forms are found in South 
Africa. 
Males. 
A. Eyes hemispherical. 
B. Coxae I divided into two blunt spines ; coxae IV with one 
blunt spine ; coxae II and III unarmed . . variegatum. 
BB. Coxae all with two short spines . , . . sylvaticum. 
AA. Eyes flat. 
B. Coxae I entire with a single long spine on posterior margin. 
'O'. Ground colour light ; anterior longitudinal line not 
joined by transverse line, and attenuated at posterior 
end, so as not to reach median transverse arched band. 
hebraeum. 
CC. Ground colour darker ; anterior longitudinal lines of 
equal thickness, usually joined by transverse band, and 
reaching median transverse arched band. 
hebraeum eburneum. 
BB: Coxae I divided into two flat teeth. 
C. Dorsal shield constricted at level of stigmatic plates ; 
posterior festoons appearing like overlapping folds. 
crenatum. 
CC. Shield not constricted, festoons not folded 
marmoreum. 
Females. 
A. Eyes hemisjiherical. 
B. Shield triangular ; dark coloured . . . . variegatum. 
BB. Shield heart-shaped ; light coloured . . . . sylvaticum. 
A A. Eyes flat. 
B. Coxae I with a long spine on posterior margin. 
C . Anterior angles of dorsal -shield- and margin of cervical 
emargination dark coloured, like rest of shield ; general 
colour of shield dark . . . . . . hebraeum. 
CC. General colour of shield lighter ; anterior angles and 
margin of cervical emargination light reddish grey 
in colour . . . . . . . . hebraeum eburneum. 
