262 NOVITATES ZOOLOGICAB XXIII. 1916. 



26. Nephele vespera Fawc. (1915). 

 This is the same as Nephele xylina R. & J. (1910). 



27. Temnorä erato Fawc. (1915). 

 This is Poliodes roseicornis R. & J. (1903), pi. 1. fig. 7 of the Revision. 



28. Hippotion dexippus Fawc. (1915). 



The type is in the Tring Musenrn, kindly presented, by W. Feather. The 

 specimen differs from H. rosae Batl. (1882) in its inferior size, in the antennae not 

 being pink, and the hindwing being somewhat more huffish and having a more 

 distinct blackish marginal band. 



The only c?c? of H. rosae we have came from Tsurneb in German South-West 

 Africa. We have taken out the $ -organs of one of them, and find that the tenth 

 tergite is broad at the base and very strongly narrowed to the apex in rosae, while 

 in dexippus this tergite is nearly the same in width from near the base to the apex, 

 being almost twice as broad as the narrow apical portion of rosae. The harpe of 

 dexippus is acuminate, whereas in rosae it is slightly spatulate. The penis-sheath 

 is practically the same in rosae and dexippus, the apical margin being incrassate, 

 forming a half-ring which ends at both sides in a dentate process, the left process 

 being broader than the right one and bearing teeth only at and near the apex, the 

 dentition of the right process being continued behind the apical margin by a row of 

 small teeth. 



Whether these differences are individual, subspecific or specific it is hardly 

 possible to say before more specimens have come to hand. Our only example of 

 rosae from Somaliland has pink antennae, which points to the type of dexippus 

 being either an aberrant specimen of rosae or representing a distinct species. We 

 incline towards the second alternative, and, at any rate for the present, shall treat 

 dexippus as distinct. 



29. Hippotion exclamationis Fawc. (1915). 



Lt.-Col. Fawcett differentiates this species from H. roseipennis Butl. (1882) 

 by some details in colour and markings. Our series of specimens of H. roseipennis, 

 from Delagoa Bay, Nyasaland, German and British East Africa and Unyoro, con- 

 vinces ns that the specimen upon which exclamationis is based belongs to roseipennis. 



30. Pergesa diyllus Fawc. (1915). 



Hippotion diyllus Fawcett, Proc. Zool. Soc. Lond. 1915. p. 109. no. 101. pi. 2. fig. 23. 



This is a most interesting species. It is closely allied to, if not the same as, 

 Pergesa socotrensis Rebel (1899). The type of diyllus, now in the Tring Museum, 

 has been very badly damaged in the post ; we have stuck the pieces together as 

 well as we could with the help of small bristles, and we hope that the specimen 

 will prove good enough for identification purposes. It looks as if it were a faded 

 socotrensis, with some of the costal markings of the forewing absent or vestigial. 

 In Fawcett's figure the thorax and base of the abdomen are not broad enough, and 

 the hindwing is too warmly coloured with the marginal band too prominent. 



It is advisable to treat, for the present, diyllus as a distinct species near 

 Pergesa socotrensis. 



