GENUS AMBLYOMMA 611 



found on the squirrel. It is, however, certain that the larvae do not 

 attach themselves to any of the common domestic animals in Madras. 

 Lounsbury has had very similar experiences in South Africa. 



In a recent paper Nuttall states that the larvae of Hyalomma aegyp- 

 tinm will feed on the ram, hedge hog and guinea pig, and he has raised 

 all the stages on these animals ; it is doubtful, however, whether these 

 animals are the natural hosts. 



TRIBE AMBLYOMMATARIA 



Anal groove contouring the anus posteriorly, with limbs directed 

 forwards and joining the genital grooves at the level of the spiracles ; 

 anal groove sometimes absent. Palps hollowed out on their internal 

 surfaces ; eyes present or absent. Usually eleven festoons on the posterior 

 border. Scutum often highly ornamented with light spots. Shields 

 absent on the ventral surface of the male. (Neumann) 



Neumann gives the following key for the determination of the genera : 

 NEUMANN'S KEY TO THE GENERA OF AMBLYOMMATARIA 



1. Eyes present .............. 2 



Eyes absent ............. 3 



2. Capitulum long ; coxa IV of male slightly larger than the other 



coxae Amblyomma. 



Capitulum short ; coxa IV of male markedly larger than the 



other coxae , Dermacentor. 



3. Capitulum long, second segment of palp not humped externally Aponomma. 

 Capitulum short, second segment of palp humped externally . Haemaphysalis. 



GENUS AMBLYOMMA, KOCH, C. L. 



Eyes flat, sometimes spherical ; capitulum long with rectangular base ; 

 lateral borders without humps or projections. Palp with the second 

 segment long and without any external processes. Scutum often highly 

 ornamented with light coloured patches. Spiracles usually triangular and 

 with rounded angles. Posterior border nearly always with eleven festoons 

 (at least in the male). Males without adanal plates but often with 

 ventral plaques (Don it z) close to the festoons. Coxa IV of the male 

 slightly larger than the other coxae. (Neumann) 



Ticks of the genus Amblyomma are chiefly found in tropical and 

 sub-tropical countries ; up to the present not a single species has been 

 recorded from Europe. North and South America and Africa are 

 specially rich in species ; a few are found in Asia. The majority are 



