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When disturbed the long-legged bat-argas is much more active and moves with greater speed that either A. confusus or A. ves rtilionis. The long anterior legs wave up and down while walki§§553 tap objects antenna-fashion. This tapping is especially active

just before the mouthparts are inserted. During feeding the anterio:

legs may or may not touch the host skin but they seldom function as a support for the tick. These ticks will feed in light or in darkness but prefer darkness.


The original authors of A. boueti described this species from material collected about 191d'in'1Bmw trees inhabited by the two species of bats listed above. In the generally arid Northern Province of Kenya, Heisch found adults on walls of an underground con. crete shelter and larvae on Me aderma cor in the same structure. Those South African specimens with collecting data are from houses.

In Egypt we conmnnly find the long-legged bat-argas thriving under the most severe desert conditions. It is less common in more humid buildings inhabited by bats in Cairo. A. boueti is the most nuerous bat-parasitizing argasid in Egypt and the same ecological observations noted for Egypt under A. vespertilionis apply to this species .

The frequency"with which these long-legged ticks fall from rough surfaces in the laboratory is suprising in view of their usual habitat on walls and on ceilings of caves and chambers. A number of specimens exhibit a body tremor that causes them to flip over on their dorsal surface with every few steps. Righting movements require considerable effort.


MAN. Attacks on our laboratory personnel have caused mild itching persisting for several weeks in warm weather.

BATS. We have been unable to find spirochetes in Egyptian material. Collections of local specimens injected into laboratory animals have resulted in negative findings for viruses and rickettsiae. Other material from the Cairo area has not yielded Shi ella organisms. The hosts from which the type series was collectes In French West Africa showed a trypanosome infection but research to ascertain the relationship of ticks and trypanosomes was not under. takene

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For a discussion of long-legged parasites of bats, see REMARKS under Ixodes vespgrtilionis.


A. boueti populations consist of two size groups, the larger about 6.3 mm. long ad 6.9 m. wide and the smaller about 5.0 m. long and 4.5 mm. wide (Hoogstraal 195512, figure 125). The significance of these “races” is at present being studied.

The subgenus Chiro erar as Hoogstraal, l955(B), of which A.
s E t

boueti is the type pecies, con ains one other species, A. co usus. This subgenus is defined as follows:


“Parasites of which bats are hosts of predilection. Morphological characters intermediate between those of typical Ar as a.nd typical Ornithodoros; with a general Ar as facies but lackI§§_a sutural lne; wit a flattened body f ange but lacking “cells” and with exceedingly slight integumental differentiation at periphery; body shape circular to transversely elliptical. Integument with fine, close granular projections; discs mostly small, conspicuous, radially distributed, ventral “paired organ‘ present. Definite hood overlputhparts; mouthparts about level with anterior bod margin. Legs of variable length, arising from anterior h 0 body; tarsal humps lacking.“


The remarks above include the outstanding characters for identifying this species and_A. confusus.


The male of A. boueti is somewhat smaller than the female and has a semIEi¥cular genital aperture while the female has a narrow, transversely elongate genital aperture bounded by two rugose lips. In both sexes, the body outline is subcircular to pearshaped (definitely wider than long in A. confusus), leg IV extends far beyond posterior margin of body_(oEly slightly beyod in_A. confusus), basis capituli and palpal se .ents comparatively narrow and elongate (globose in A. confusus , minute integumental protuberances are mostly flat (mostly tapered in A. confusus), etc. The dental formula of both species is 1/1, thé_apex of the hypostome is slight. ly indented, and a corona is lacking.

The larva and nmph have been described by Roubaud and Colas. Belcour (1959) and in more detail by Hoogstraal (l955B).

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2 Torit Chaere hon major Dec

1 Torit YE 5355655 pusillus _ (svs) % Latome *Pachyotus sp. Mar (SVS)

Sunat Taphozous perforatus haedinus Feb



As A. vesnertilionis (in part): Khartoum and Northern Prov. inces (KIng , .

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A. confusus is recorded from scattered localities from Egypt to the Cape of South Africa. Additional collecting will undoubtedly reveal its occurrence elsewhere on the continent. This species is

thus far not known outside of Africa.

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EAST AFRICA: SUDAN (In part as A. vespgrtilionis: King 1911,

1926. As 5. ves rtilionis group: Hoogstraal 19548. As A. confusus: Hoogstraal 19558).

KENYA (Hoogstraal 1955B).


*Host name on label; identity not checked by authority in host group.

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