C. L. Boulenger 
313 
The cloaca is provided with a large ventral lip (Text-fig. 2). 
Female, 23-35 mm. long, with a maximum thickness of 0-45-0-65 mm. 
Vulva, a transverse slit, 4-5-6-8 mm. from the posterior extremity of the 
body; it is not covered by a large, linguiform process as in the type species, 
that structure being replaced by a much shorter conical projection of the 
body-wall, situated to one side of the genital opening (Text-fig. 3). 
Ovijectors, 0-8-1-1 mm. long. Ovaries wound spirally around the intestine 
as in H. contortus. 
Anus, 0-47-0*58 mm. from the tip of the slender, pointed tail. 
Eggs, 0-068-0-07 mm. long by 0-04-0-05 mm. wide, segmenting when laid. 
Fig. 2. Cloacal region of male: A. Fig. 3. Haemonchus lo?igistipes, Body of female 
Haemonchus longistipes; B. Hae- in region of vulva, x 60. 
monchus contortus. x 250: 
Location. Fourth stomach of the camel (Camelus dromedarius). Africa 
and India. 
The measurements given above show that Haemonchus longistipes is a 
somewhat larger form than the type species. The males may be distinguished 
from those of H. contortus by the character of the posterior ray of the bursa, 
by the size of the cloacal lip and by the length of the spicules, as well as the 
position of the barbs at the posterior extremities of these structures. The 
females of H. longistipes may be recognized by the absence of the linguiform 
process over the vulva in fully developed specimens, and by the measurements 
of the eggs, which are smaller than those of the type species. 
21—2 
