1899.] ON BTITTEUFLTES FUO^r BTIITISIT EAST ATKTCA. 417 



groove there is a second sliJillow furrow ; the teeth of L. victorice 

 are also very broad, with the inner portion much raised, the outer 

 portion slopes off considei-ably, being at the same time depressed 

 towards the middle : thus the skulls of these three Hares are 

 readily recognized by a glance at their incisors. The enamel-folds 

 forming the grooves in the upper incisors of this new Hare are 

 lance-shaped, cutting straight into the teeth antero-posteriorly, 

 and completely filled with cement. The folds of the enamel in the 

 teeth of L. ivJiytei are almost globular, with a peak in the middle 

 line posteriorly. Those in the teeth of L. victorice are more com- 

 plicated, the sides diverging considerably, forming two points 

 postero-laterally with a concave hinder margin. 



The discovery of distinctive characters in the incisor teeth of 

 Hares is entirely due to the researches of Dr. Porsyth Major, with 

 whom I have had the good fortune to be associated and who is 

 now engaged in writing on that subject ; these characters were 

 pointed out to me as likely to assist in the determination of species, 

 and I have found them most valuable. 



EXPLANATION OF PLATE XXIV. 



Lepus crawshayi, sp. noT., p. 416. 



4. On two small Collections o£ Butterflies made by Mr. 

 Richard Crawshay during 1898 in British East Africa. 

 By Arthur G. Butler, Ph.D., F.L.S., F.Z.S., &c., 

 Senior Assistant-Keeper, Zoological Department, 

 Natural History Museum. 



[Eeceived February 27, 1899.] 

 (Plate XXV.) 



Towards the end of last year we received a box of Lepidoptera 

 from Mr. Crawshay containing 83 Butterflies and 218 Moths, 

 chiefly collected at Machako's ; and, in January of the present 

 year, a second consignment of 35 Butterflies, 143 Moths, and a 

 Dipteron*, chiefly collected en route from Machako's to Naugia (or 

 Neugia). The present paper gives an account of the Butterflies 

 in these two series ; the Moths will eventually be worked out by 

 Sir George Hampson. 



As usual, Mr. Crawshay has sent home nearly the whole of the 

 specimens in admirable condition, and has carefully labelled the 

 whole with exact locality, date of capture, and in some cases with 

 the altitude at which they were obtained ; notes on the habits are 

 often added, as well as the colouring of the eggs obtained from 

 the bodies of gravid female examples. 



Three new species are described in the present paper — Acroea 



' According to Mr. Austen a BicJuBtometopia (possibly B. tesseUata, Macq.). 



