242 DR. A. G. BUTLER ON BUTTERFLIES [Feb. 18, 
the young leaves appear, they commence to feed. Last season the 
young larve of L. disippus appeared on the 24th of April, and on 
the 30th passed into the second stage, on the 7th May into the 
third stage, aud on the 13th into the fourth stage, turned to pupx 
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 larve of 
Limenitis ursula and its mode of life must closely resemble those of 
L. disippus. 
I have again the pleasure of exhibiting a pair of Hudemonia 
argus, from Sierra Leone, and I may here mention that, besides the 
usual differences in the antenne, the male has only four spots 
on the hind wings, and the female has always five. 
The specimens of Ehodia fugax emerged from cocoons deposited 
in the Insect-house by the Hon. Walter Rothschild, F.Z.S. The 
larve were reared, I believe, in the neighbourhood of Richmond, 
on willow, from ova imported from Japan. I had some ova of 
this species, but the young larve 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, pl. vii. fig. 3, 
as were also Saturnia belina and Urota sinope. Of these last two 
species males only were figured. The specimens exhibited are all 
females. 
Of Orthoptera an example of a very curious locust, Petasta 
spumans, was brought home in December and presented to the 
Society by Mr. Robert 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 Arruur G. Burier, 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. 8. 1884 & 1885), 
they are of considerable interest, inasmuch as they contain inter- 
mediate forms between species hitherto regarded as distinct. 
