554 Appendix to RcvTlv, St. AuLyn Rogers' Btonomic 



African butterflies are found to meet and intergrade in the 

 Eastern equatorial belt. 



The known range of P. tninenii 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.E. 



Sub-family FAriLIONINJE. 



Pajnlio darclanus, Brown, sub-sp. tibullics, Kirby, $ form, 

 nov. dorijypoidcs. 



Exp. cd. 3" S'" (one example).* 



Nearest to the $ form trophonius, Westw., lid with the 

 VMrm-fuhous colouring of both fore- and hind-ivings grecdly 

 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-iciny : fuscous restricted 



* This expanse is decidedly greater than that attained by Kikuyu 

 examples of the sub-species polytrophiis, J ord., that I have measured, 

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

 the new 9 form dunppoidcs thus more approa^lies that of the Eastern 

 sub-species tibullns, and of the Southern sub-species cenea, in which 

 botli sexes have an ex^janse varying from 3" 7'" to 4" 3'". Typical 

 P. darclanus 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 border to the fore-wings) 

 attaining an expanse of 5". 



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

 pohjtroplins. 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 than paUitrophus, while the male 

 (Fig. 7) has the black hind-wing band of libidlns and not that of the 

 former sub-sjjecies. It is ])rubable that in the Nairobi district tibullns 

 occurs at the lower elevation — about 5000-G500 ft., while 2)olytrophtis 

 captured by Doherty is labelled G500-9000 ft. There is little 

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

 and freely interljreed ; furthermore that the resemblance of dorip- 

 poldes to specimens oi pulytrophns is to be explained thereby. 



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

 that a trimeni female form recently taken by him at Nairobi, belongs, 

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

 puhjtrophus. E. B. P.] 



