MonophlebincE. 447 



pointed and strongly falcate ; ungual and tarsal digitules represented by 

 very slender, simple hairs. Dorsum with numerous stout curved spines 

 {figs. 10, 12) which are broad on the basal half, then tapering to near the apex 

 which is very slightly expanded. The ceriferous tracts are raised above the 

 level of the intermediate areas and are characterised by a closer covering of 

 spines {sttfig. 12). The anal orifice is masked by a dense tuft of long stout 

 setcE which— in early adult examples — may extend beyond the posterior margm 

 of the body {fig. 9). Venter thinly clothed with stout setie, which are longest 

 on the frontal area {fig. 13). The dermal pores vary on different areas of the 

 body. Small quadrilocular pores occur, amongst the spines, on the ceriferous 

 tracts (see /fi/". 12). Slightly larger quadrilocular pores, mingled with others 

 containing six or seven translucent cells {fig. id), are found on the intermediate 

 areas. There is a dense cluster of large, thick-rimmed, saucer-shaped pores 

 {fig. 11) surrounding the anal orifice. The pores of the ventral surface are 

 distinctly larger and more complex. Those occurring on the frontal and 

 marginal areas have a well-defined trilocular central orifice surrounded by a 

 ring of bead-like cells varying in number from five to nine (see fig. 13). On 

 the median thoracic area are circular and oval pores, with a simple oval central 

 aperture and a surrounding ring of from five to ten cells {see fig. 14) ; while, on 

 the hinder edge of the abdominal segments, pores of all these types appear to 

 be mingled together (see fig. 15). Venter with three conspicuous cicatrices 

 below the genital opening {fig. 8). Dorso-abdominal spiracles small, in- 

 conspicuous and difficult to distinguish amongst the dense covering of spines. 

 Length of complete insect, with processes intact, 12 mm. Breadth, 9 mm. 



Nymph very similar to adult, but smaller, and with the processes more 

 closely adpressed to the body. Antenna {fig. 5) short and stout ; seven- 

 jointed. 



Larva not observed. 



On the stem of undetermined tree. Kelani Valley. 



WALKERIANA SENEX, Greeft. 



(Plate CLXXXVL) 



Walkcriana senex, Green, Ind. Mua. Notes, Vol. IV. No. i, p. 6 (1S96). 



Adult female {fig. i) strongly convex ; the form concealed by a number of 

 stout, curved, whitish, waxy processes which are arranged in definite series, 

 viz., two medio-dorsal series, forwardly directed, those on the thorax larger and 

 more widely separated than those on the abdomen ; a dorso-lateral series, 

 radially directed, those on the thorax larger and stouter ; a dorso-marginal 

 series, of which the posterior processes are the longer ; and a marginal series 

 which is more or less hidden by the super-imposed dorso-marginal series, except 

 towards the posterior extremity where they are much longer and eventually 

 coalesce to form an ovisac {see figs. 3 and 4). The posterior extremity of the 

 ovisac is closed below by an operculum of brown earthy matter. * In many 

 examples the processes are beautifully and regularly banded with brown 



