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Annals of the Transvaal Museum. 
wide, other articles as long as wide, article IY conical ; long hairs on 
outer and distal margins of all articles, terminal tuft of hairs on 
article IV. Legs, slender and very long, pair IY longest ; Coxae 
elongate, removed from median line, pairs II, III, and IY contiguous, 
pair I removed anteriorly ; article I longer than wide, other articles 
all very long and slender ; tarsi gradually attenuated at tips ; all 
articles with numerous whitish hairs; claws very long and slender. 
Male (I, l). — Resembles the female except for the following 
points: much smaller, 5.5 mm. wide by 5.5 mm. long; somewhat 
narrower in front than behind, but lacks the conical anterior pro- 
longation of the female; integument with papillae not so strongly 
formed ; a pair of large pits on the dorsal surface on each side of the 
median line at about the anterior third of the length, in front of 
these another pair of pits, further removed from the median line, 
with a third pair still further anteriorly and more widely separated, 
behind the first-mentioned pair another pair of pits, more widely 
:separated ; numerous radiating rows of pits as in female ; anus with 
eight long spines on each valve, close to the anal ring ; genital pore 
short transversely, opposite Coxae I ; deep coxal grooves ; mandibles 
(II, V) short and thick, process of outer apophysis bidentate and 
attached low down, outer apophysis bidentate ; hypostome (II , v) 
with three rows of small teeth on each side at tip, first row consisting 
of two teeth, other rows of four teeth each, then a row of three larger 
teeth, followed by a row of two very large teeth each. Legs shorter 
and stouter than in female; pairs I and IY longest; Coxae contiguous ; 
article I as wide as long or about so ; other articles much longer than 
wide; claws of tarsi shorter than those of female. 
Nymph (1 , n). — Body almost circular, may reach 2.4 mm, long 
by 2.1 mm. wide, narrowly rounded anteriorly, which acts as a hood 
in covering the rostrum. Integument marked with fine zigzag folds 
on young individuals, but with papillae on those which are older ; on 
each surface a border, formed of irregufar folds on young individuals, 
elongate quadrangular plates on those more mature, narrower 
anteriorly, plates bearing very short hairs, irregularly disposed. 
Arrangement of pits on dorsal and ventral surface as in the 
male; other characters like those of male except as follows : anus with 
five spines on each valve; deep transverse groove immediately 
posterior to the anus ; the extremities of the rostrum often appear 
beyond the anterior edge of the body; process of inner apophysis and 
outer apophysis inserted very anteriorly, otherwise resembles those 
of the male; hypostome (II, u) provided on each half with two 
longitudinal rows of five or six strong teeth each ; two long hairs at 
the base of the rostrum, near the median line, two others shorter, 
more posterior, and more widely separated, on the prolonged axes of 
the palpi. 
Larva. — Body short, oval, truncate in front; 1.3 to 2 mm. long 
by I to 1,5 mm. wide; colour varying from light dirty yellow co 
reddish, deeper in centre, bluish when engorged ; legs lighter in 
colour ; flat, with the margin and the centre of the dorsal surface 
raised ; ten radiating grooves in the posterior half of the dorsal 
surface and a somewhat larger number in the corresponding part of 
the ventral surface. Integument marked with fine folds, parallel, 
transverse, a little undulating. On each side of the dorsal surf ace 
three hairs, distributed symmetrically in the anterior half ; twenty 
