1896.] PROM ARABIA AND SOMALILAND. 251 



11. Htrbus LINGEUS. 



Papilio lingeus, Cramer, Pap. Exot. iv. pi. ccclxxix. F, G (1782). 

 . $ , Shaik Othman, 1st April, 1895 (Col. Ferbury). 



12. Zbsius livia. 



Lyccena livia, King, Symb. Phys. pi. 40. figa. 3-6 (1834). 



(J 5 , Shaik Othman, 24th February ; (S , Aden, bred from seed- 

 pods of Acacia edgwm-thii, 4th March ; d ? i Lahej, 12th March ; 

 ? , Shaik Othman, 5th April, 1895 (Col. Yerhury). 



13. ChIOROSBLAS ESMERALDA. 



Chhroselas esmeralda, Butler, P. Z. S. 1885, p. 765, pi. xlvii. 

 fig. 4. 



<J; Zaila, Somaliland, 23rd May, 1895 (Capt. Nurse). 



Mr. Trimen, ' South-African Butterflies,' vol. iii. p. 414, 

 observes: — "On careful comparison of two males taken by 

 Mr, Selous — which quite agree with Mr. Butler's description of 

 C. esmeralda — and of three very fine males taken near Durban by 

 Mr. Millar, with the type of A. pseudozeritis, I have come to the 

 conclusion that esmeralda is identical with pseudozeritis." He 

 then proceeds to point out that his type and specimens from 

 Durban are darker below than the others, have a fuscous cloud 

 on the middle disc of the hind wings , the silvery spots very 

 brilliant, and " There are two linear tails on the hind wing, 

 respectively on the first median nervule and the submedian 

 nervure." This, to ray mind, settles the question : the Somali 

 examples only have one tail ; they are uniformly of a buffish stone- 

 colour below without any clouding. I examined an example, pre- 

 sumably of C pseudozeritis, about a year ago, and decided that it 

 was undoubtedly distinct. 



. 14. loLAUS NURSBi, sp. n. (Plate X. fig. 16.) 



Closely allied to /. imhrosa (P. Z. S. 1885, p. 766, pi. xlvii. fig. 6), 

 but the wings above bright cobalt-blue, with two whitish super- 

 posed spots on the disc of the primaries, close to the slaty-black 

 outer border ; the fringe much whiter, pure white towards external 

 angle : secondaries above with two or three ill-defined white discal 

 spots parallel to outer margin ; the outer border pure white, 

 bounded internally by a dusky stripe, including the ordinary black 

 spots, and externally by a sharply-defined black line ; fringe pure 

 white with a greyish line : wings below pearly white, the pattern 

 nearly identical with that of I. umbrosa, but the bands black-brown 

 instead of red : other differences which exist may be variable and 

 therefore not worth noting. Expanse of wings 35-40 millim. 

 . d ^, Shaik Othman, 3rd March and 3rd April, 1895 (Col. 

 Yerhury) ; ^ , 26th February, rf $ , 31st March {Capt. Nurse). 



This is doubtless the Arabian representative of the Somali 

 /. umbrosa ; but it is a far prettier insect. 



