( 461 ) 



segment of the latter alinust uu u level with metauotum ; spiues of abdomeu as ia 

 Macroglossum, strong, flat, those of first row broader than long ; seventh (?) or 

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

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

 longer (PI. LXIII. f. 5). External row of spines of foretavsus reduced to hairs 

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

 hiudtarsns somewhat compressed, with or without additional spines on the outer 

 surface of the first segment. SO'' and SO' of forewiiig anastomosed at apex of 

 wing ; cell of hindwing very short ; SC'- and 11', and R^ and M' stalked. 



(?. Sexual armature more or less asymmetrical. Tenth tergite (PI. XLIII. 

 f. 6 — 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 to .vards 

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

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

 Penis-sheath thin, ending in a slender point (PI. LI. f. 'Z'-t — 25 ; PI. Lll. f 1 — ^3), 

 mostly armed with two teeth pointing basad. 



¥ . Eighth to tenth abdominal segments much smaller in width than 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 chitiu ; orifice small, proximal, a little removed 

 towards the left side. 



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

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

 brown, sometimes almost black ; jjronotum rather broad and generally different iu 

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

 dots. — Food-plants : Gardenia ; Kruaasia. 

 Pupa : tongue-case compressed, carinate. 

 Hab. x\ethiopian and Oriental Regions, northward to Japan. 

 Twelve species. 



We have met with asymmetrical development of the male genital armature 

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

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

 we are 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. G. kingi is the most normal of the species of which we know the $ 

 organs. Here we find the tenth tergite (PI. XLIII. f. 0) divided by a groove into 

 two processes which are only separate at the very ti2J, the left process (t) being a 

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

 (PI. XLIII. f. 7) is also nearly (juite symmetrical. In C. picas (PI. XLIII. f. 8) 

 the tenth tergite is of the same shajie as liefore, except that the left process is 

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

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

 tergite is long, we find a short tergite iu 0. jaiuis (PI. XLIII. f. 11. 13), the ninth 

 tergite (/A7) being corres[iondingly longer ; in the eastern forms of this species the 

 tenth tergite is nearly syinmetiiciil, while it is more distinctly asymmetrical in the 

 western form (from Flores ; I'l. XLIII. f. Hi) ; the sternite (PI. XLIII. f. 12. 14) is 

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

 proceHH of the tenth tergite (PI. XLIII. f. 8, /, right in liguresj iudiwited in i/icas 



