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Show 244 MESSRS. C. J. GAHAN AND G. J. ARROW ON THE [Nov. 3, Skull stout and strong, with broadly spread zygomatic arches, expanded nasals, well developed postorbital processes, and broad interorbital region. Palatal vacuitie? about normal, opposite the first three molariform teeth. Middle upper premolar about equal to the posterior; middle lower one rather larger than that behind it. Molars large, as in M. cinerea, markedly larger than in M. regina. Dimensions of the type, an old male, measured in the flesh : - Head and body 180 m m . ; tail 195 ; hind foot (s. u.) 27; ear 31. Skull-greatest length 45*8 m m . ; basal length 42"1 ; zygomatic breadth 26-6; nasals, length 20*7, greatest breadth 6 8, least breadth 3*2 ; interorbital breadth 8-2 ; breadth across postorbital processes 10'1 ; breadth of brain-case 16; palate length 25; length of three anterior molariform teeth 7-8. Marmosa constantice is larger, paler, and has a shorter tail than M. cinerea, its nearest ally, with which it shares the characteristic shape of skull and nasals. The Bogota M. regina Thos. has a narrower skull, less expanded nasals, and unicolor tail. I have named this pretty species in honour of the donor of the present most valuable accession to the National Collection, in recognition of her enlightened method of commemorating her late husband's memory. EXPLANATION OF PLATE XXVII. Canis sladeni, sp. n., p. 235. 3. List of the Coleoptera collected by Mr. A. Robert at Chapada, Matto Grosso (Percy Sladen Expedition to Central Brazil). By C. J. G A H A N , M.A., and Gr. J. A R R O W. [Received August 18, 1903.] (Plate XXVIII.*) In this collection the Lamellicornia, Longicornia, and Phyto-phaga are especially well represented; but, since our knowledge of the coleopterous fauna of Brazil is mainly confined to more northern regions, the whole collection, which contains specimens of 175 species, forms a valuable contribution to the materials available for the study of the distribution of South American insects. N e w species of Lamellicornia, Rhynchophora, Heteromera, Longicornia, and Phytophaga are described, and there are in addition others which, for want of sufficient specimens or other reasons, it is not advisable at present to describe. The earlier groups, as far as and including the Rhynchophora, have been dealt with by Mr. Arrow, while for the remainder Mr. Gahan is responsible. # For explanation of the Plate, see p. 258. |
