BY R. J. TILLYARD. 263 



The exuviae, on being cleaned, show practically no pattern, 

 The following is the description (Plate xxiv., fig. 3): — 



$. Total length 49-50 mm. Head rather flat above, 10 mm. 

 wide; eyes fairly large, not prominent; hack of head well rounded, 

 a small tuft of hairs just behind each eye; ocelli small, in a 

 triangle, reniform; anten^ice, 5 mm. long, seven-jointed, curved 

 (Plate xxiv., fig.5), the joints shaped as follows: 1, enlarged, 

 hemispherical; 2, narrower, oval; 3, very narrow, cylindrical, 

 longer than 2; 4, short, oval; 5, nearly twice as long as 4, oval, 

 wider; 6, longer than 5, oval; 7, narrow, cylindrical, not so long 

 as 5; frontal ridge small and narrow; labrum broad. Labium 

 (Plate xxiv,, tig.4) when folded naturally, 9 mm. long, greatest 

 breadth 6-5 mm., joint of mask reaching to just behind procox^; 

 mentum strong and thick, rectangular, lather flat, concave in 

 middle as seen from below; a tuft of hairs on each side just below 

 joint of lateral lobe; front edge of mentum projecting in a triangle 

 in the middle, a small set of hairs on each side; lateral lobes 

 3 mm. long, 1*7 mm. wide in middle, outer border very slightly 

 curved, rather square at top, inner border more curved, no angle 

 or indentations at apex; movable hook 1-4 mm,, very strong and 

 thick, pointed, basal joint placed about three-fourths of the way 

 along outer edge of lobe; edges of lobes well ridged, neither 

 mental nor lateral setae present. Thorax: i)rothorax well 

 formed, nearly as wide as head, not ridged. Meso- and metathorax 

 rather short, 10 mm. wide, fairly well rounded on each side. 

 Wing-cases 13 mm., lying parallel along back of abdomen (in some 

 exuviae they are turned in all directions), hindwing projecting 

 about 2 mm. beyond forewing and reaching to end of segment 4; 

 width of forewing case 2-5 mm., of hindwing case 3 mm. Legs 

 very stout and strong; coxce rather large, 2 mm.; trochanters 

 narrow, 15 mm.; measurements of femur, tibia and tarsns 

 respectively as follows : foreleg, 8-9-3 mm.; middle leg, 9-9-3-5 

 mm.; hind leg, 13-11-5 mm. A tuft of hairs in front of i)rofen)ora 

 near bases, also a few hairs on protibise. Tarsi (Plate xxiv., figs. 

 8-9, protarsus) ending in two strongly pointed spines or hooks, 

 much curved, above which are two smaller spines, also curved: 



