554 Appendix to Rev. K. St. Aubyn Rogers' Bionomic 



African butterflies are found to meet and intergrade in the 

 Eastern equatorial belt. 



The known range of P. triinenii is now a wide one, 

 extending from Port Natal along the East Coast to 

 Mombasa, and thence inland to " Taveta (K. St. A. Rogers), 

 captured December 2nd, 1905 " [^ in Hope Department], 

 and Kibwezi (C. W. Hobley) captured in April 1907. 



Family PAPILIONID^. 



Sub-family PAPILIONIN^. 



Fajjilio dardanus, Brown, sub-sp. tihullus, Kirby, $ form, 

 nov. dorijypoides. 



E.i'p. (d. 3" 8'" (one example).* 



Nearest to the $ form trophonius, Westw., hit ivith the 

 ivarm-fidvous colotiring of both fore- and hind-wings greatly 

 extended, causing a correspondingly large reduction and 

 obsolescence of usual fuscous area in fore-wing, and a 

 similar but less pronounced condition of the hind-marginal 

 fuscous border in hind-wing. Fore-wing : fuscous restricted 



* This expanse is decidedly greater than that attained by Kikuyu 

 examples of the sub-species jwhjtrophnu, Jord., that I have measured, 

 which vary ( ^ ) from 2" 10'" to 3" 5'", and ( 9 ) from 3" 2"'-5"'. In size 

 the new 5 form dorippoidcs tlius more approaches that of the Eastern 

 sub-species tihtlbis, and of the Southern sub-species ceneu, in whicli 

 both sexes have an expanse varying from 3" 7'" to 4" 3'". Typical 

 P. dardanus from West Coast is larger than any of its sub-species, 

 both sexes expanding from 4" to 4" 6'" ; — one very large ^ from 

 Fernando Po (with extremely wide black l)order to the fore-wings) 

 attaining an expanse of 5". 



[I think that the sub-species is the Eastern tibidlns, Kirby, and not 

 pohjfixqjhi's. The latter is found at the higher elevations. The two 

 Nairobi specimens (about 5500 ft.), represented on Plate XXVIII, 

 Figs. 6 and 7, are also much larger thau pohitrophns, while the male 

 (Fig. 7) has the black hind-wing band of tilndlns and not tliat of the 

 former snb-sjiecies. It is probable that in the Nairobi district iibuUus 

 occurs at the lower elevation — about 5000-6500 ft., while jxilijtrophns 

 captured by Doherty is labelled 6500-9000 ft. There is little 

 doubt that the two areas overlap, and that the two sub-species meet 

 and freely interbreed ; furthermore that the resemblance of dorip- 

 poides to specimens oi pol\itr(>phiis is to be explained thereby. 



Since the above note was written, Mr. Rogers has informed me 

 that a trimeni female form i-ecently taken Ijy him at Nairobi, belongs, 

 he believes, to the large tibtillus sub-species rather than the small 

 jwhjtrophus. E. B. P.] 



