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Show 1899.] ON BUTTEBFLTES FROM BRITISH EAST AFRICA. 417 groove there is a second shallow furrow • the teeth of L. are also very broad, with the inner portion much raised, the outer portion slopes off considerably, 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. whytei are almost globular, with a peak in the middle line posteriorly. Those in the teeth of L. victorice are more complicated, 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. Forsyth 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 vrawshayi, sp. nov., p. 416. 4. On two small Collections of Butterflies made by Mr. Richard Crawshay during 1898 in British East Africa. By A R T H U R G. BUTLER, Ph.D., E.L.S., E.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 Dipteron1, chiefly colfected 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-Acrcea 1 According to Mr. Austen a Dichcetometopia (possibly D. tcssellata, Macq.). |
