942 DB. A. G. BUTLEB ON BUTTEBFEIES [Dec. 4, 



2 . Paler than male, secondaries sometimes whitish ; veins dusky : 

 transparent spots on primaries much larger than in the male, 

 especially those towards centre of wing, which are chiefly separated 

 by the veins ; outer borders dusky, the markings on secondaries 

 better defined owing to the paler ground-colour : body darker, the 

 transverse bars on head less defined : colouring below a trifle paler, 

 the darker portions cupreous brown ; some of the spots on 

 secondaries indistinct. Expanse of wings 40-45 millimetres. 



2 , Nairobi forest, March 18 ; 2,6", Euarka Eiver, April 27 & 

 29, 1900. 



Of the first example taken Mr. Crawshay writes : — " This 

 Hesperid appears to me possessed of a devil : half an hour have 

 I expended in endeavouring to close the wings, and only with 

 indifferent success. Light emerald-green spherical ova." 



The nearest ally of E. plicata is E. sabadius from Madagascar, 

 but it is altogether a darker and more strongly marked species 

 on both surfaces : it is also allied to E. decastigma, but differs in 

 outline and pattern. 



103. Eketis dj^el^eIuE. 



Pterygospidea djcelcelce, Wallengren, Kongl. Svensk. Vet.-Akad. 

 Handl. 1857, Lep. Ehop. CafEr. p. 54. 



Eoromo, Feb. 4, 1900. 



" The first of its kind I have seen in these pai*ts, and on cursory 

 examination I think a different insect to one very nearly resembling 

 it common in Ukamba proper. The fore legs of this specimen are 

 white (externally), which, as far as my recollection goes, is not the 

 case with the 'Skipper' of Ukamba." (11. C.) 



104. Cel^enoeehinus opalinus, sp. n. (Plate LVIII. figs. 10, 

 11.) 



Allied to E. galenus : the male more richly coloured ; the semi- 

 transparent black-edged markings on the primaries deeper in tint 

 and more brilliantly opalescent, the subbasal and intern o-median 

 spots much smaller, the outermost of the subapical spots only 

 represented by a small black patch, in one example with a minute 

 transparent point on one wing ; in the secondaries the spots which 

 cross the cell in G. galenus are wholly absent ; the spots towards 

 anal angle are ill-defined and the orange patch projects inward on 

 its inner edge, leaving a broader brown marginal band : below the 

 differences are nearly as above, but the secondaries show one well- 

 defined orange spot in the cell, the remainder of the basal area 

 being pretty uniformly dark brown finely irrorated with orange 

 scales. Expanse of wings 39-40 millimetres. 

 . In the female, which is of a less mahogany-red colour, the spots 

 are much paler, those of the primaries as in C. biseriatus (of which 

 C. macidatus is the male), excepting that the outermost of the 

 subapical spots on the primaries is reduced to a mere point : on the 

 secondaries there are only four spots towards outer margin, the 

 first, third, and fourth minute, the second large and rhomboidal, 



