RHOPALOPSYCHE. 395 



Larva : — 



1st instar. Head round, body short and cylindrical, horn 

 very short, nearly cylindrical, a long bristle on each point of 

 the bifid tip ; head and segments 2, 3 and 14 covered with 

 bristle -like hairs, median segments with four lines of similar 

 hairs on each side of the dorsal line — one subdorsal, one dorso- 

 lateral, one supra- and one subspiracular ; colour greyish- 

 green, the hairs and dots from which they rise black ; horn 

 black. 2nd instar. Head, body and horn covered thickly 

 with short hairs, finer than those of the 1st instar ; head 

 and body green ; a whitish dorso-lateral stripe from segment 2 

 to base of horn ; horn and hairs black. 3rd instar. Horn of 

 medium length ; hairs short except on head, horn and anal 

 segments ; head and segments 2 and 3 apple -green, rest of body 

 dark bluish-green dotted with white ; dorso-lateral stripe 

 bluish ; horn dark purple, paler at. base, tth instar. Similar 

 to 3rd instar, body still covered with very fine hairs ; stripe 

 yellow on segments 2 to 7. 



5th instar. Head round ; true clypeus with apex acute, 

 less than half length of head ; false clypeus vestigial ; labrum 

 one-third length of clypeus and one-quarter as broad as clypeus ; 

 ligula kidney-shaped, as long as labrum and as broad as clypeus ; 

 cutting-edge of mandible not toothed ; eyes with 3, 4 and 6 in 

 a straight line, the line joining 1 and 2 at an angle of 120° with 

 the line joining 3, 4 and 6 ; 1 and 2 and 3 and 4 one eye-diameter 

 apart, 2 and 3 less than one diameter, 6 nearly three diameters 

 from 4, 5 about three diameters from 4 and rather less from 6 ; 

 surface of head dull, set sparsely with minute, shining tubercles. 

 Body dull, macroglossine in shape ; horn of medium length, 

 tip conical ; segment 2 with a broad saddle-shaped marking 

 covered with small tubercles ; a transverse row of minute 

 tubercles along each secondary ring, one tubercle of each row r , 

 on the dorso-lateral stripe, larger than the rest, these larger 

 tubercles most prominent on segments 3 and 4, hardly notice- 

 able on the other segments ; horn covered with large, conical 

 tubercles directed distad ; anal flap and clasper faces covered 

 with small tubercles. 



Coloration. — Green form (PL X, fig. 12) : head green, with 

 a pale stripe separating face from cheek ; labrum and ligula 

 green ; basal segments of antenna green, end-segment rusty ; 

 mandible green, tip narrowly dark reddish-brown. Body 

 green, the tubercles white ; a dark green dorsal stripe from 

 segment 2 to base of horn, bordered on each side by paler 

 green ; the dorso-lateral stripe yellow on the anterior segments, 

 white to base of horn ; subspiracular region tinged with 

 yellow. Horn purple, tip yellowy tubercles black ; legs reddish ; 

 prolegs reddish with a black band on the shank ; anal flap 

 edged with yellow. Spiracles oval, flush with a narrow rim, 

 reddish in colour. 



