10 
Psyche 
[Mar. 
tween the coxae, the remainder on the opisthosoma, five 
of the latter in the festoons. 
The same nnmber of sensilla anriformia is fonnd in 
the larvae of Hyalomma dromedarii Koch (Text-fig. 2) 
as in Rhipicephalus and their arrangement is similar. 
In the larva of Boophilus calcar atus Birnla (PI. 3, fig. 
7) the pair behind the third coxae and the first pair on 
the edge are missing, but the remaining sensilla anrifor- 
mia are as in the larva of Rhipicephalus. 
Summary 
The larvae of the Rhipicephalinae do not possess pecu- 
liar integumentary sense organs, as K. W. Neumann 
(1942) believed, but rather the same types found in the 
nymphs and adults. The organs are merely in a more 
primitive state of development and the sensilla laterni- 
formia appear to be missing. Sensilla sagittiformia, 
sensilla hastiformia and sensilla anriformia may be dem- 
onstrated. These organs are strictly specific in number 
and arrangement within the genera Rhipicephalus , Hya- 
lomma and Boophilus. 
Bibliography 
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