Annals of the Transvaal Museum. 



129 



ventral edges, as well as a row of stout spines, somewhat dentate ; the outer 

 •edge of article 1 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 hy more than their 

 diameters ; liypostome with six row^s of teeth, each row con- 

 sisting of about 12 teeth ; mandibles {XI, h) with process 

 of inner apophysis tri dentate, outer apophysis tridentate, terminal tooth 

 small and sub-ventral. Legs slender, dark l3rown 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. 



Nyinp/i. — Elliptical in outline ; when unengorged, 1.35 mm. long 

 by 0.75 mm. wide ; when engorged, 1 mm. long hy 2.25 mm. wide ; 

 slightly wider in front than behind ; colour bluish. Shield {XI, h) small, 

 dark l^rown 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 nujuerous large papillae, 

 distant from each other ; two anterior and tliree ])osterior 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 jjresent ; stigmatic plates small, 

 whitish, elliptical in outline. Eostrunt (X7, d) light coloured, l)ase 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 bnt thick. 



Larva. — Body longer than wide ; widely rounded at both ends ; light 

 reddish brown in colour : k'ngth 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 {XL d) with genital grooves well marked ; ano- 

 marginal groove deep ; festoons jn^esent ; 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 ])airs of spines between 

 'Coxae ; several spines in posterior area. Bostnnu Avith base wide and 

 narrow, sides rounded ; palpi elongate, article I very short and almost 

 invisible, articles II, III, and lA^ longer than wide ; article II constricted at 

 base ; article III conical ; hypostome with four rows of teeth, al)out seven 

 teeth in a row, and crenulations to the l)a^e ; 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 ; 



