CYPA. 221 



vaginal plate of C. decolor replaced by a much smaller plate 

 which is divided by a deep median channel into two sclerites 

 (viii. st) which are either smooth or more or less rugulose ; 

 behind these sclerites the membranaceous portion of the 

 segment folded, the folds more or less parallel with the oblique 

 posterior margin of the segment. Eighth tergite transverse, 

 smooth, truncate, with the angles rounded off, without apical 

 cavity or impression. 



Hab. E. Himalayas (Khasi Hills : Cachar ; Sikkim). We 

 have bred the subspecies in the Khasi Hills, where larva? 

 occur somewhat rarelv in the rainy season, at an elevation of 

 from 4,000 to 5,000 feet, 



Larva : — 



1st to 3rd instars not seen. 4dh instar. Head triangular, 

 with a short process rising from apex of each lobe ; body 

 increasing in diameter from segment 2 to 7, then cylindrical: 

 horn rather short, straight ; colour of head pale green dotted 

 with white tubercles, processes yellow ; a pale yellow cheek- 

 stripe ; body pale green, with a transverse row of small white 

 tubercles along each secondary ring ; a broad dorsal stripe 

 from segment 2 to base of horn dark green edged narrowly 

 with white ; seven narrow white oblique stripes ; horn green 

 with white tubercles. 



5th instar. Head elongate -triangular, 7 mm. long by 4-5 mm. 

 broad, with a short process rising from the apex of each lobe, 

 the processes closely appressed to near tips ; clypeus about 

 one-third length of head, apex acute, basal angles rounded ; 

 false clypeus very narrow ; labrum about one -half length 

 of clypeus, slightly broader than clypeus, divided into five 

 squares by longitudinal channels ; ligula slightly longer 

 and narrower than labrum, kidney-shaped, lobes rounded, with 

 a channel down each lobe, these channels meeting above apex 

 of sinus : eyes 1 to 6 in a slight curve, 1, 2 and 3 about one 

 eye -diameter apart, 3, 4 and 6 about two diameters apart ; 

 5 forming an equilateral triangle with 4 and 6 ; 4 larger 

 than the rest. Face shining and superficially transversely 

 wrinkled, cheek dull, the whole surface of head, including 

 processes, covered sparsety with small, round, smooth, seti- 

 ferous tubercles. Body : segment 2 much lower than head, 

 segments increasing in diameter from 2 to 7, rest of body nearly 

 cylindrical. Horn of medium length, gently down-curved, 

 stout at base and tapering evenly to a blunt, bifid tip. Surface 

 of body dull : a transverse row of very small tubercles along 

 each secondary ring. Horn covered with larger tubercles ; 

 anal flap covered with small tubercles and one large subdorsal 

 tubercle. 



Coloration. — Face bluish-green, cheek pale green, tubercles 

 white, processes yellow ; a narrow whitish stripe, edged inside 

 with dark green, from the base of each process to base of 



