OXYAMBULYX. 121 



Underside tawny, slightly paler proximally, feebty irrorated 

 with small darker speckles, no blotches ; fore wing with a grey 

 terminal band, which is very narrow posteriorly and does not 

 reach tornus ; the blackish line bounding this band diffuse, 

 feebly marked, often vestigial. Hind wing : the bands of 

 upperside present, or at least the median band indicated, 

 shadowy. Body similar to wings ; palpus and breast tawny, 

 sides of breast with a vinous-red tint. Expanse ; 100-110 mm. 



J. Eighth sternite (fig. 24 B) with a distinct median lobe 

 which is truncate, with the angles more or less rounded and 

 sometimes turned inward (= upward). Tenth sternite broad, 

 with a very small, round, median sinus. Armature of clasper 

 (fig. 24 C, D) recalling 0. substrigilis and 0. placida, with 

 two processes, the upper process pointed and somewhat curved 

 mesiad (i. e., away from the inner surface of the clasper), 

 the apical process much broader, a little longer, gradually 

 narrowed, but remaining obtuse, with the apex also curved 

 mesiad ; both processes slightly variable in length and width ; 

 above the ventral margin of this harpe a row of teeth 

 variable in number. Penis-sheath (fig. 24 E, F, G) of 

 the same type as in 0. substrigilis, ending with a rod- like 

 process which is much broader and shorter than in that 

 species ; at each side of this dorsal rod, which is slightly 

 curved ventrad apically, there is a longitudinal dentate ridge 

 connected with the sheath by a membrane and capable 

 of being moved a short distance away from the sheath. 



$. Post -vaginal sclerite (fig. 24 H) smooth, transversely 

 concave nearly in centre ; in front of orifice a definite ridge 

 of chitin, sharp, slightly uneven, highest in middle. 



Hab. S. India (Kanara District), where Ave have bred this 

 species. It is not rare, but rather local, and occurs in 

 forests with heavy rainfall up to 1,000 feet elevation. 



Egg. — Not known. 



Larva : — 



Final instar. Head triangular, vertex broadly rounded, 

 much higher than segment 2 ; processes represented by a very 

 small tubercle on the apex of each lobe ; true clypeus one-third 

 length of head, apex acute, basal angles very rounded and 

 tumid, the tumidity separated from rest of clypeus by a deep 

 channel, whole clypeus shaped like an ace of spades ; false 

 clypeus hardly traceable, a narrow strip along upper part of 

 true clypeus ; labrum one-third length of and slightly broader 

 than clypeus, with a deep dorsal longitudinal depression 

 flanked on each side by a longitudinal ridge ; ligula four times 

 as long as labrum, shaped like a sausage constricted in the 

 middle, and covering the greater part of the mandibles ; 

 eyes J to 4 in a curve ; 6 in line with 3 and 4 ; 5 forming an 

 equilateral triangle with 4 and 6. Surface of head shining and 



