242 Dn. A. G. BUTLER ON IHTTTEBFLIBS [Feb. 18, 



the young leaves appear, they commence to feed. Last season the 

 young larvae of L. dmpptis appeared on the 24th of April, and on 

 the 30th passed into the second stage, on the 7th May into the 

 third stage, and oti the 13th into the fourth stage, turned to pupae 

 on the 18th, and the first butterfly appeared on May 22nd. It 

 was not until the perfect insects appeared that examples'of another 

 species were to be detected amongst them, so that the larvae of 

 Limeiiitis Ursula and its mode of lite must closely resemble those of 

 L. disippits. 



I have again the pleasure of exhibiting a pair of Eiidcemonia 

 argils, from Sierra Leone, and I may here mention that, besides the 

 usual differences in the antenna), the male has only four spots 

 on the hind wings, and the female has always five. 



The specimens of llhodia fugax emerged from cocoons deposited 

 in the Insect-house by the Hon. Walter llothschild, li'.Z.S. The 

 larvae were reared, I believe, in the neighbourhood of Eichmond, 

 on willow, from ova imported from Japan. I had some ova of 

 this species, but the young larvae would not feed and all died. 

 One peculiarity of this larva is, that it makes a squeaking noise 

 when disturbed. 



The specimen of Attacus mythimna is the second example of this 

 beautiful species exhibited before the Society. This species was 

 originally described and figured, P. Z. S. 1849, p. 40, pi. vii. fig. 3, 

 as were also Saiurnia belitia and Urota sincrpe. Of these last t\A'0 

 upecies maleg only were figured. The specimens exhibited are all 

 females. 



Of Orthoptera an example of a very curious locust, Petasia 

 spumans, was brought home in December and presented to the 

 Society by Mr. Eobert Ganthony, who obtained it from Krugersdorp 

 Falls, near Johannesburg, Transvaal. It fed upon watercress and 

 chewed apple, but I am sorry to say did not live very long in England. 



The following papers were read : — 



1. On the Butterflies obtained in Arabia and Somaliland by 



Capt. Chas. G. Nurse and Col. J. W. Yerbury in 1894 



and 1895. By Ahthuu G. Butlek, Ph.D., Senior 



Assistant-Keeper of Zoology, Natural History Museum. 



[Received January 29, 1896.] 



(Plate X.) 



Although the collections now received add only a very few 

 species to the lists of Butterflies published in my papers on the 

 Lepidoptera of Aden and Somaliland (P. Z. S. 1884 & 1885), 

 they are of considerable interest, inasmuch as they contain inter- 

 mediate forms between species hitherto regarded as distinct. 



