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Show 1878.] MR. BUTLER ON A NEW SPIDER FROM MADAGASCAR. 799 3. Description of a Remarkable new Spider from Madagascar. By A R T H U R G. BUTLER, F.L.S., F.Z.S., &c. [Received July 24, 1878.] Amongst a series of insects of various orders recently collected in Madagascar by the Rev. William Deans Cowan, I found two Epeirids which especially interested me. The first of these I at once recognized as a fine example of the Epeira tuberculosa of Vinson (Aran, de Reunion, Maurice, et Madagascar, pl. xiv. fig. 2), specimens of which were previously in the collection of the British Museum. The second spider struck me as so extraordinary that I wrote to the Rev. O. P. Cambridge respecting it. He tells me that it is a Ccerostris, allied to C. mitralis, Vinson (loc. cit. pl. ix. figs. 2-4), but it appears to be perfectly distinct. "Epeira tuberculosa " belongs also to Ccerostris. Fig.l. Ccerostris a vernalis (enlarged). Fig. 2. Profile of abdomen. Fig. 3. View of abdomen from behind. COJ-ROSTRIS A V E R N A L I S , n. sp. Cephalothorax and falces dark castaneous, clothed at the sides and behind with whity-brown pile; palpi and legs above bright reddish castaneous, hairy at the sides, the femora cylindrical, with blackish lateral hairs, the tibiae and tarsi flattened and longitudinally bisulcate, with whitish lateral hairs ; tibiae and tarsi below with their basal or distal extremities broadly belted with whitish, and their proximal extremities blackish ; abdomen dark clay-coloured, covered (excepting the tubercles and odontoid processes) with whitish pile ; centre of ventral surface blackish. Falces large, rugulose, subcylindrical; palpi broad, flattened, bi- |