Ga 
432 ' Mr. S. Hirst on 
more than three times as long as wide; the dorsal surface is 
convex. Anterior portion of body bearing the two first pairs 
of legs strongly chitinized; dorsally it is covered by two 
strong plates, the anterior one being small and trapezoidal in 
shape and considerably longer than wide. More than half 
the rest of the dorsal surface is covered by a thin chitinous 
plate, the posterior end of which is truncated. Venter and 
uncovered part of dorsal surface striated, the striations being 
transverse except on the anterior part of the venter, where 
they run obliquely. Numerous minute denticles with their 
points directed backwards are present on the ventral surface 
of the abdomen. ‘There are only a few hairs on the body, 
and they are all very fine and short. 
Capitulum large and triangular in shape, the apex pointing 
forwards; the greater part of this structure is formed by the 
palps, especially by the second segthents, which are strongly 
salient laterally. 
Legs.—The two first pairs of legs are rather wide and con- 
siderably flattened ; tarsus of these limbs grooved below and 
furnished with a distinct curved knob, besides smaller pro- 
tuberances. Although reduced in size, the pulvillus is present 
on the tarsi of these legs. Posterior legs slender and with 
the pulvillus large. Hairs on legs few in number and mostly 
short and inconspicuous, but there is a long fine tactile hair 
at the distal end of the third tarsus. 
Generative nymph much smaller and less elongated than 
the ovigerous female. A longitudinal series of minute 
curved lobes or scales runs down the middle of the dorsal 
surface, coming to an end a little distance from the poste- 
rior end. The series is really a double one, the lobes of 
each side facing one another, and each bearing a thin back- 
wardly directed spine. ‘l'hese lobes arise from the inner end 
of the oblique striations present on the body. 
Male a little smaller than the generative nymph. Poste- 
rior end of body produced, forming a distinct process or tail 
(which is much shorter than the tail-lke process present in 
the malenymph) ; this process is slightly rounded at the end. 
Tnere is a pair of minute suckers on the venter just in front 
of the posterior end of the body. Genital aperture placed 
opposite the proximal segments of the last pair of legs. The 
three anterior pairs of legs are very similar to those of the 
female, but the last pair are considerably longer than the 
others, and the tarsus is bent so as to form a hook ; a small 
pulvillus is present on this modified tarsus, and also a fairly 
long and blunt hair or seta. 
