KOVITATES ZOOLOGICAE XXII. 1915. 101 



EXPLANATIONS OF PLATES IIL— XIX. 



Figures 1 to 30 are the npper- and undersides of certain species, to show points 

 of resemblance or distinction between them which are not well or not at all illus- 

 trated by figures alreadj- published. 



They are enlarged something less than two diameters, generally as about 

 11, 12, or 13 to 7 ; and are from photographs by A. E. Tonge. 



Figures 31 to 77 are photographs of c? genitalia, also by Mr. Tonge, and are 

 magnified by 25 diameters. 



Figures 78 to 85 illustrate the scent fans or pencils ; these are by BIr. F. N. 

 Clark. 



I do not present any figures of the female genitalia. These appear to present 

 items for specific characters in the structures of the eighth abdominal sternite, but 

 the preparations I have made and had photographed refer to species whose distinc- 

 tive characters are otherwise adequate, or to specimens whose determinations I am 

 not sufficiently sure of to rely on them ; these remain therefore for some future 

 occasion, and I expect for some other observer. 



Imagines. 



Figs. 1 and 2. sperthis c?, under- and upperside. 



„ 3 and 4. ,, var. minima, upper- and underside. 



Note the numerous minute black dots on the underside, which are character- 

 istic of the species. Fig. 6 appears to show similar dots, but in this figure these 

 are blemishes of the specimen hardly visible to the naked eye, but picked up, as 

 the figure shows, by the camera; iu figs. 1 and 4 they are actual markings. 



Fig. 5. bulis S underside. 

 ,, 6. acuta S „ 



These show the different position of the oblique postdiscal line in the two 

 species, especially how much nearer the base of the wing it is on the inner 

 margin in acuta. Unfortunately both species vary so much in wing outline that it 

 is often difficult to verify this difierence. 



Fig. 7. pkae(/rus cJ, underside, shows the postdiscal line faintly. 



Figs. 8 and 0. t/tetis S under- and uppersides. British North Borneo form. 



A comparison of 7 and 8 shows that the advance towards the hlnd-margia of 

 the lunulated line forward of vein 4, which obtains in various species, is absent 

 in pkaedrun, but marked in thetis. C. thetis from India is usually too devoid of 

 markings to illustrate this. 



Fig. lu. iiesophila, upperside, shows the regular arch-like curve of the outer 

 margin of the copper area, which is approached, but not so definite in other forms of 

 Cicretis, fig. 28, underside. 



Figs. 11 and 12. tagalica var. talautensis c?, upper- and undersides differ from 

 the type form in the outline of the copper area and in the paleness of the 

 underside. 



Figs. 13 and 16. tagalica var. talautensis ?, under- and uppersides ; this differs 

 less than the S from the tyjncal form. 



Figs. 14 and 15. thetis var. hougaincillei S , under- and upperside. 



„ 17 and 18. „ „ „ ?, upper- and undersides. The figures 



sufficiently show the difl'erences from typical (Indian) thetis. 



