i3 1 
ON THE EXTERNAL ANATOMY OF 
ORNITHODOROS MO U BAT A 
(Murray) 
BY 
ROBERT NEWSTEAD, A.L.S., F.E.S., Etc. 
(lecturer on economic entomology and parasitology) 
( WITH TWO PLATES) 
A consignment of the ticks referred to in the previous paper on the 
Human Tick Fever seen on the Upper Congo was forwarded from the 
Congo Expedition by Drs. Todd and Dutton. The ticks arrived at their 
destination on June 8th, after a journey of three months duration. The 
majority of the animals had died during transit, but seven examples were 
still living, and with them were found a number of fertile eggs, larvae in 
various stages of development and several active nymphs. Dr. H. E. 
Annett kindly handed the whole consignment over to me with the request 
that the species should be determined, and that if any further details could 
be added that they should be given in an appendix to the Report of the 
Congo Expedition. The material to hand afforded ample means for the 
study of the external anatomy of this species, and as the larva and nymph 
do not appear to have been described, or the characteristics of the adult 
female very clearly defined, it seemed desirable that as full an account as 
possible should be given in order that future investigators may have a more 
ready means of determining this highly important, but somewhat obscure, 
member of the Argasidae. 
Ornithodoros Moubata, Murray. 
(Plates I, 2). 
Ornithodoros moubata, Murray, Economic Entomology. Aptera p. 182, No. 31, two 
figures, 1877. 
Nec Ornithodoros savignyi (Audouin), Neumann, Mem. Soc. Zool. France, IX., p. 
26, 1896 [ubi. synon). 
Ornithodoros savignyi, var. ccecus, Neumann, op. cit. XIV., p. 256, 1901. 
Ornithodoros moubata (Murray), Pocock, Thompson Yates, and Johnston Laboro- 
tories Report, Vol. V., Pt. I., p. 188, pi. XV. 1903. 
Ornithodoros savignyi, var. ccecus (1), (Neumann), Lancaster, Journ. of Trop. 
Medicine, p. 124, 1905. 
Adult female : Dorsum dusky-brown, with irregular confluent blotches, 
rarely lines, of dusky ochreous-yellow ; in some examples the blotches were 
confined to the anterior region, in others they extended almost to the 
posterior margin ; underside usually somewhat paler than the dorsum, 
abdominal region largely occupied by dull orange-ochreous blotches, which 
gradually merge into the darker ground colour. Legs and rostrum of a pale, 
