( 291 ) 



Hub. Natal northward to Ugauda. 



In the Triug Museum 1 larva, 7 SS, 5 ? ? from : Natal; Kiouga, south of 

 Hovima R. (Keimer) ; Kamuanura, Bulamwezi, Uganda, 211. iii. 1897 (Dr. Ansorge). 



LXX. LANGIA. — Typus : zenzeroidns. 



I.'iiKjia Moore, Proc. Zool. Soc. Lond. p. 567 (1872) (type : zenzerokles). 

 iMiKjki (!), Kirby, Cat. Lep. Het. i. p. 70.i (1892). 



c??. Tongue reaching end of forecoxa ; pilifer with a brush of scales instead 

 of bristles ; genal process broad. Palpus just visible in dorsal view, not essentially 

 different in the sexes, with long hairs laterally. Antenna of S compressed, not 

 strongly grooved, slightly dilated above the grooves, hence outline undulate in a 

 dorsal view, distal segments much higher than long, but only slightly compressed ; 

 of ? very feebly compressed, seriated ciliae short ; end-segment very short, and 

 obtuse in both sexes. Body roughly scaled, excepting head, pro-mesonotum and 

 end of abdomen ; the scales gradually widened towards ends, dentate ; no spines on 

 abdomen. Tibiae )wt spinose ; spurs long, two pairs to hindtibia, with long naked 

 points ; tarsi short, lateral apical spines strong, outer spines of soles more or less 

 erect and inclining mesiad ; claws and pulvillus large, parouychiam with one broad 

 lobe at each side. Distal margin of forewing dentate ; D- of hiudwing curved, 

 sending a long spur into cell, R- below centre of cell ; frenulum and retinaculum 

 present. No organ of friction on clasper. 



Larva granulose, the granules pointed, white, a dorso-lateral series of higher 

 granules from pronotnm to horn, situated upon a white line ; head very strongly 

 narrowed above, very high, impressed behind, frous not granulose ; horn very short. 

 — Food-plant : wild cherry. 



Pupa very stout and short ; rounded at both ends, without cremaster ; head 

 without projections, tongue-case longer than that of the second leg, reaching to the 

 wing-cases, but not in between these ; tergites rough with grannies, the granules 

 sparse on the sternites ; wing-cases short. 



Hab. North India to Japan. 



One species. 



247. Langia zenzeroides. 



Liiiiijia xeii:crui(lrs Jlooru, /.•■. (type : where 0- 



S ? . The grey, brown, and black colour of this species reminds one very much 

 of Cossids. It is, however, not a case of mimicry, but the similarity is due to this 

 Sphinx as well as the Cossids being adapted in colour to the bark of trees. There 

 is some individual and geographical variation botii in colour and structure. 



c?. Tenth abdominal tergite bilobate (PL XXIV. f. 25. 26) ; sternite broadly 

 ilivided into two processes. Clasper long, narrowed to apex, dorsally reduced in 

 width, hence a wide gap between it and the supra-anal [jlate, ventro-apical margin 

 turned inward ; harpe produced into a long, horizontal, ventral process which is 

 sinuate and lobate at the end ; the process is visible without dissection (PI. XXXIII. 

 f. 14. 15). Penis-sheath irregularly compressed (PI, XXX. f 4^), very stout, armed 

 at the end with a long strong hook which curves ventrad. 



? . Anterior part of the vaginal plate strongly chitiiiiscd, raised into a transverse 



