( 462 ) 



is exaggerated in ('. hi/hof and U'licotjaiiti'v^ where this left process is represented by 

 a short bruad piece of chitiii lying at the base of the right process (PI. XLIJI. 

 f. 10 — 18, /), wliich latter is more or less hooked. We must expect to meet with 

 connecting links between the segment as presented in picus on the one side and 

 hijUts and Unico(jnMcv on the other ; as yet no such intermediate stages in the 

 asymmetrical development of the tenth segment are known. The reader will notice 

 that the tergites (if hjlas and Ifurognstrr have tlie appearance of being simple 

 instead of divided ; the reduced left side of the tergite is indeed so little prominent 

 in a dorsal aspect (PI. XLIII. f \-\) that a casual observer might be misled to 

 consider the segment simple as in Mac rot/ 1 ok. s"m. In /ti/la.s the process has developed 

 to a strong hook, which is longest in the ludo-Japanese subspecies, shorter in the 

 Aethiopian subspecies. The long lobe of the sternite found in jj/cms (PI. XLIII. f. 8) 

 is absent from /ti/laii ; this reduction stands probably in connection with the develop- 

 ment of the tergite into a formidable hook. In U'ucoyaster, on the contrary, the 

 tergite is not very strong, while the lobe of the sternite (PI. XLIII. f. 9. lU) is 

 very large and curved, surpassing the tergite in length and width. The movement 

 of the sternite towards the right side faintly indicated in C. kingi (PI. XLIII. f. 6) 

 and very obvious in picus (PI. XLIII. f. 8), has gone so far in Icucngmite)' that the 

 sternite and tergite are on the same level (PI. XLIII. f. 9, dorsal aspect : f. 10, 

 ventral aspect). 



The asymmetry of the ninth tergite {IXt) is sligiit in C. kiiuji (PI. XLIII. f. 0) 

 and very obvious in the other species. The lateral flaps of the ninth segment, the 

 claspers, are unequal in all tlie species. Here again ('. hin<ii presents the least 

 asymmetrical structure. In this species the left clasper (right in figure) is elongate, 

 slender, tapering (PI. LI. f. ~!o), wiiile the right one is of the same length, but 

 broader. In leucogastir (PI. LI I. f. 2) the difference in the two claspers is 

 considerable, as it is also in jjicus (PI. LII. f. 3). In both species the left clasper 

 has remained simple in outline, while it is sinuate, pr to a more or less great extent 

 divided into two lobes in (". Jii/las (PI. LI. f. 22. 23. 24). This latter development 

 is exaggerated in apus (PI. LII. f. 1), where the upper lobe of the left clasper is 

 very long. For the development of the tenth sternite see also above under 

 llaemorrhaiiiu. The penis-fimnel (I'-F) is mostly symmetrical, bnt is longer at the 

 right side in pkm and kingi. 



The vaginal orifice is removed a little towards the left side, in accordance with 

 the development of the male armature. 



Key to the sjiecies : 



«. Fortibia ending in a prominent thorn . . . Ii. 



Foretibia without an apical thorn . . . . h. 



b. Distal border of forewing at least 4 mm. 



wide at It^ -Jisij. C. kiiuji. 



Distal border of forewing less than 4 mm. 



wide at li' . . . • • ■ . <:. 



c. Body black above 3'J7. C. titan. 



Body not black above ; breast white, slightly 



yellowish ........ d. 



Body not black above ; breast yellow . . . e. 

 (/. Last abdominal sternites all white, red belt 



of abdomen marked only at the sides . 3'J6. C. leucogaster. 



