( 462 ) 



is exaggerated iu C. hjlus and leucogaster, where this left process is represented by 

 a short broad piece of chitiu lying at the base of the right process (PL XLIII. 

 f. 15 — 18, /), which latter is more or less hooked. We must expect to meet witli 

 connecting links between the segment as presented iu picas on the one side and 

 ki/l(i--< and leiKogrtster 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 tergitos of lii/las and lei/coff'isfrr have the appearance of being simiile 

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

 iu a dorsal aspect (PI. XLIII. f lo) that a casual observer might be misled to 

 consider the segment simple as in Macrof/lo.s.snm. In hjla.-i the process has developed 

 to a strong hook, which is longest iu the Indo-Japanese subspecies, shorter iu the 

 Aetbiopian subspecies. The long lobe of the sternite found iu picas (PI. XLIII. f. S) 

 is absent from /ii/las ; this reduction stands probably in connection with the develop- 

 ment of the tergite into a formidable hook. In leucogaster, on the contrary, the 

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

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

 of the steruite 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 iu leucogaster that the 

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

 ventral aspect). 



The asymmetry of the uiuth tergite {IXt) is slight iu C. kingi (PI. XLIII. f. (i) 

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

 claspers, are unequal in all the species. Here again C. kingi presents the least 

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

 slender, tapering (PI. LI. f. 25), wliile the right one is of the same length, but 

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

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

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

 divided into two lobes iu ' '. lii/las (PI. LI. f. 22. 23. 24). This latter development 

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

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

 Ilaemorrhagiu. The penis-funnel (r-F) is mostly symmetrical, but is longer at the 

 right side in picas 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 species : 



a. Fortibia ending iu a prominent thorn . . . h. 

 Foretibia without an apical thorn . . . . b. 

 I). Distal border of I'orewing at least 4 mm. 



wide at R' • :i69. C. kingi. 



Distal border of forewing less thau 4 mm. 



wide at K' c. 



c. Body black above 397. C. titan. 



Body not black above ; breast white, slightly 



yellowish ........ il. 



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



d. Last abdominal sternites all white, red belt 



of abdomen marked only at the sides . 396. C leucogaster. 



