936 DE. A. G. BUTLEB OK BUTTERFLIES [Dec. 4, 



85. Phrissuba phcebe, sp. n. (Plate LVIII. figs. 6, 7.) 

 Allied to P. confusa, the male above with yellow internervular 



folds interrupting the divisions of the external border, the basal 

 orange patch clear and bright ; secondaries lemon-yellow, washed 

 towards base, on abdominal area, and on outer margin with a more 

 ocbreous tint ; marginal spots much larger than in P. confusa : 

 primaries below white ; discoidal cell nearly filled with bright 

 orange ; apical area and outer margin bright ochreous crossed by 

 white veins terminating in black points, two small black submar- 

 ginal spots near extremities of median nervules : secondaries 

 bright ochreous, costal border orange towards the base ; marginal 

 spots small and black : body below white. Expanse of wings 54- 

 62 millimetres. 



2 . Chiefly differs from the male in the shorter primaries, the 

 obscure ruddy tint instead of the clear orange at the base of these 

 wings above, in the heavier marginal spots and more ochreous 

 secondaries ; below the primaries show rather less orange in the 

 cell and four submarginal spots, the upper ones running inward 

 and bounding the ochreous apical area. Expanse of wings 58 

 millimetres. 



A variety (answering to P. dubia of P. isohani) also occurs, in 

 which the apical area of the primaries and the secondaries are 

 primrose-yellow traversed by blackish veins and with a squamose 

 blackish border. Expanse of wings 44 to 56 millimetres l . 



<S <$ , 2 2 , Nairobi forest, March 20, 1900. 



Both sexes are labelled as females, the pale variety being ap- 

 parently regarded as distiuct. I have been unable to discover 

 what species Mr. Crawshay believed to be the male; the similarity 

 in the sexes doubtless deceived him. 



86. Belekois zochalia. 



Pieris zochalia, Boisduval, Sp. Q-en. Lep. i. p. 506 (1836). 



cJ 6 , 2 2 , Eoromo, Nov. 23 & 26, 1899 ; $ ? (yellow form), 

 Jan. 22 and Feb. 18, 1900. 



" Frequents open glades in forest : a dashing flyer, not easily 

 taken." (R. O.) 



Of one worn example Mr. Crawshay writes — " A relict of the 

 dry season, as I have taken four newly emerged specimens of this 

 insect to-day " (Nov. 26). The under-surface markings prove this 

 to be correct, as they are feebly defined. The first yellow-winged 

 female is noted as "a somewhat dilapidated specimen, which proved 

 a very difficult insect to take — a quick flyer, and a great adept at 

 doubling." 



The second example, which was tolerably perfect, is noted as : — 

 " Elsewhere a very familiar form ; but I have not previously met 

 with this insect here until to-day : doubtless the recent heavy 

 rains are responsible for new animals on the scene." 



It is evident from this note that Mr. Crawshay did not recognize 



1 Is the reputed male of P. isokani really distiuct from the Western P. phaola ? 

 the female ( = P. dubia) certainly is. 



