( 461 ) 



s(!gment of tlio latter almost on a level with luetaiiohim ; spines oi' alulomoii as in 

 MdcroylossHia, strong, flat, those of first row broader than long ; seventli (?) or 

 eighth (c?) segment with an expansible fan-tail ; sternite of seventh segment 

 truncate, armed with spines at apical edge like the tergites, but the distal spines 

 longer (PI. LXIII. f. o). External row of spines of foretarsns reduced to hairs 

 on first segment, the sijiues of second row sometimes at right angles to the segment ; 

 hindtarsus somewhat compressed, witli or without additional spines on the outer 

 surface of the first segment. SC^ and SC of forewing anastomosed at apex of 

 wing ; cell of hindwing very short ; SC- and U', and R^ and M^ stalked. 



S. Sexual armature more or less as3'mmetrical. Tenth tergite (Pi. XLIll. 

 f. — 18) divided, the right half (left in figures) often reduced ; sternite lanceolate, 

 or deeply divided into two broad lobes, more or less twisted, often removed towards 

 the right side, or without lobes. Olasper without friction-scales ; large, right and 

 left generally very different; harpe vestigial, without process, practically absent. 

 Penis-sheath tliin, ending in a slender point (PI. LI. f. 2'Z — 25 ; PI. Lll. f. 1 — 3), 

 mostly armed with two teeth pointing basad. 



? . Eighth to tenth abdominal segments much smaller in width tlian the 

 preceding segments, there being a deep cavity all round between the seventh and 

 eighth segments. Seventh tergite incrassate beneath laterally. Eighth tergite a 

 narrow and transversely long halfmoon. Vaginal plate chitinous, connected with 

 seventh sternite by a plate of chitin ; orifice small, proximal, a little removed 

 towards the left side. 



Larva not, or little, tapering in front ; head larger than in Macroglossam ; horn 

 very long in first stages ; a dorso-lateral line from head to horn. Colour green or 

 Ijrowu, sometimes almost black ; pronotum rather broad and generally different in 

 colour from following segments, rough with granules like anal segment ; no white 

 dots. — Pood-plants : Gaj'dt'nid ; Kruussia. 

 Pupa : tongue-case compressed, carinate. 

 llab. Aethiopian and Oriental Regions, northwanl to Japan. 

 Twelve species. 



We have met with asymmetrical development of the male genital armature 

 in several instances among the Sesiiiiae. The jjresent case is, however, of 

 particular interest, since the degree of asymmetry is different in the species, so that 

 we arc enabled to recognise the connection between the highly specialised organs 

 and the normal ones. The asymmetry is found both in the ninth and tenth 

 segments. C. kinyi is the most normal of the species of which we know the c? 

 organs. Here we find the tenth tergite (PI. XLIIL f. G) divided by a groove into 

 two processes which are only separate at the very tip, the left process (l) being a 

 little longer than the right (/• ; left in figure) ; the tergite is straight ; the sternite 

 (PI. XLllL f. 7) is also nearly quite symmetrical. In C. picuis (PI. XLIIL f. 8) 

 the tenth tergite is of the same shai>e as before, except that the left process is 

 longer than the right, and that the segment is so twisted towards the left side that 

 the sternite becomes visible at the right side. While in these two species the tenth 

 tergite is long, we find a short tergite in C. Janus (PI. XLIIL f. 11. 13), the ninth 

 tergite (/A7) being correspondingly longer ; in the eastern forms of this species the 

 tenth tergite is nearly symmetrical, wliile it is more distinctly asymmetrical in the 

 western form (from Flores ; PI. XLIIl. f. 13) ; the sternite (PI. XHII. f. 12. 14) is 

 obviously asymmetrical, as is also the ninth tergite. The reduction of the left 

 process of the tenth tergite (PI. XLIIL f. 8, /, right in figures) indicated in picas 



