Annals of the Transvaal Museum. 
129 
ventral edges, as well as a row of stout spines, somewhat dentate ; the outer 
edge of article I strongly constricted, producing an apparent constriction of 
the rostrum at the base of the palpi ; porose areas of medium 
size, ovate in outline, and separated by more than their 
•diameters ; liypostome with six rows of teeth, each row con- 
sisting of about 12 teeth ; mandibles (XI, k) with process 
of inner apophysis trident ate, outer apophysis tridentate, terminal tooth 
small and sub-ventral. Legs slender, dark brown in colour ; coxae longer 
than wide, coxae II, III, and IV each with two blunt teeth on their 
posterior margins ; stiff hairs on all the articles ; tarsi II, III, and IV each 
with two ventral spurs, the proximal one not so sharp. 
Nymph. — Elliptical in outline ; when unengorged, 1.25 mm. long 
by 0.75 mm. wide ; when engorged, 4 mm. long by 2.25 mm. wide ; 
slightly wider in front than behind ; colour bluish. Shield (XI, b) small, 
dark brown in colour ; pentagonal in outline, deeply emarginate in 
front, antero-lateral edges straight and occupy fully two-thirds of the length 
of the shield ; posterior edges concave, but widely rounded in middle ; 
•cervical grooves shallow, nearly straight, diverging slightly behind and 
nearly reaching the posterior margin ; lateral grooves very close to the 
margin, slightly concave, and reaching the posterior margin ; shield convex 
between the cervical grooves ; eyes at the lateral angles, small and shining ; 
shiny ; surface shiny and glabrous, with a few very large punctuations, 
mostly in the median area. Dorsal surface with numerous large papillae, 
distant from each other ; two anterior and three posterior grooves ; 
posterior festoons present. Ventral surface with papillae present only in 
posterior half ; genital grooves present and reaching almost to the 
posterior margin ; ano-marginal groove present ; stigmatic plates small, 
whitish, elliptical in outline. Rostrum (XI, b) light coloured, base wide and 
short, articulated by a slender neck; lateral angles sharp ; palpi slender, 
articles elongate ; hypostome with four rows of teeth ; mandibles as in 
female. Legs slender^ light coloured ; coxae I with a single median, 
posterior tooth, coxae II, III, and IV with two posterior teeth each 
(XI, g) ; tarsi elongate but thick. 
Larva. — Body longer than wide ; widely rounded at both ends ; light 
reddish brown in colour ; length 0.75 mm., width 0.50 mm. ; when 
■engorged, oval in outline, dark reddish or bluish in colour, 1.3 mm. 
long by 0.9 mm. wide. Shield as wide as long ; widely rounded behind ; 
antero-lateral edges very convex, allowing body to show for some distance 
before the lateral angle ; cervical grooves shallow ; eyes in lateral angles ; 
surface smooth, except for a few short spines. Dorsal surface (XI, d), when 
engorged, with two anterior and three posterior grooves ; festoons well 
marked. Ventral surface (XI, cl) with genital grooves well marked ; ano- 
marginal groove deep ; festoons present ; stigmatic openings in four pairs, 
one behind each pair of coxae, and one pair near the posterior margin, in 
festoons next to the most anterior ones ; three pairs of spines between 
coxae ; several spines in posterior area. Rostrum with -base wide and 
narrow, sides rounded ; palpi elongate, article 1 very short and almost 
invisible, articles II, III, and IV longer than wide ; article II constricted at 
base ; article III conical ; h}p)ostome with four rows of teeth, about seven 
teeth in a row, and crenulations to the base ; mandibles as in female. Legs 
elongate but thick ; light coloured ; coxae I triangular, anterior end almost 
projecting beyond cervical angle of shield, one posterior tooth present ; 
