1884.] J. Wood-Mason— O/i the Genus Phyllothelys. 207 



1. Phyllothelys westwoodi, W.-M., PI. XII, Figs. 1 — 2. 



loc. supra cifc. 



^ . $ . Rich dark or liglit umber-brown of the colour of bark and 

 dead and rotten leaves. 



? . Vertex greatly protuberant ; the protuberance divided into 

 three lobes, two small and hemispherical, lateral and basal, and one large, 

 the median lobe of the vertex, flat, smooth, and triangular in front, but 

 convex in every direction behind, and rounded at the apex, from which it 

 suddenly gives off a long, slender, and very gradually tapering almost 

 linear horn ; the protuberance is marked off in front from the rest of the 

 head by a transverse groove which corresponds to an imaginary straight 

 line di^awn tangentially to the upper surface of the eyes, and the sides 

 of its median lobe and of the horn into which this is prolonged are ex- 

 panded into foliaceous crests, which are turned up or rather back at 

 their outer edges and, being longitudinally wrinkled on their anterior 

 surface, are hence sharply marked off from the perfectly smooth primitive 

 horn ; this is raised, in the middle line of its posterior face, into a thin, 

 sharp, and prominent crest, which is continued a short distance on to the 

 protuberance itself, and, owing to the forward curvature of the horn, as 

 well as to its own decrease in height from the base upwards, hence has 

 its free edge distinctly arched. In the male, the horn and its parts are 

 reduced to a quite rudimentary condition and are folded up into a 

 soft, flexible, and slightly asymmetrical conical process only about 

 1 millim. in length. Facial shield pentagonal, fully as long as broad, 

 with two distant and incomplete longitudinal ridges on its disc and a 

 blunt spinif orm tubercle projecting from its basal angle. Eyes rather 

 prominent ; not nearly so naiTOW as in Phyllocrania. 



Prothorax greatly elongated and slender, devoid of all traces of 

 foliaceous expansions ; prosternum roof-shaped decreasingly from the 

 setting-on of the forelegs backwards and thickly speckled with darker ; 

 pronotum narrowing behind the dilatation and then widening again, 

 concomitantly increasing in height, to the base, where it is as broad 

 as at the dilatation, and where it bears in the middle line an elongate 

 and slightly bilobed smooth tubercle; with its lateral margins finely 

 denticulate and with a well-developed supracoxal dilatation ; its anterior 

 lobe parallel- sided, with a median dorsal ridge lodged in a shallow 

 depression ; its posterior lobe provided with a raised median longitudinal 

 i-idge decreasing from the base forwards and becoming stronger again 

 at the dilatation, where, like the ridge on the anterior lobe with which 

 it is in unbroken continuity, it is lodged in a shallow depression. 

 28 



