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Show 740 MR. F. O. PICKARD CAMBRIDGE ON [June 16 11 mm. long, 7 mm. broad, elongate oval; with four pairs of sigilla visible-1st pair at base of labial plate, 2nd marginal, 3rd submarginal, 4th remote from margin. Labium broader than long, apex armed along its entire width with cuspules. Coxa of pedipalp scarcely twice its width ; anterior distal angle slightly produced ; anterior basal angle armed with cuspules, becoming fewer and more scattered towards the disc. Legs spinose ; fourth pair longest. Tarsi and three-fourths of protarsi i. and ii. scopulate; of iii. tarsi and half protarsi, of iv. tarsi and very slightly at the apex of protarsi, scopulate. Femur iv. with velvet pad on inner side. Tarsal claws 2; inner with 7 denticles, outer with 6. Spinners 4; posterior pair as long as tibia ii. This species is very much smaller than A. geniculata, from which it differs, first in the relative length of the first and fourth pairs of legs, secondly in the proportion of the anterior eyes. Its tarsi and protarsi, too, are much less broadly padded with scopular hairs. A single female from Para; from a native palm-thatched hut. I have much pleasure in connecting this fine species with the name of M r . Brocklehurst, to w h o m we are indebted not only for this specimen and many others, but also for great courtesy in rendering every assistance in his power to further the success of the expedition. This species is an addition to the National collection. The following species have been described and their differential characters diagnosed by M . Simon (Ann. Soc. Ent. Fr. 1892, p. 280) :- A. musculosa, E. Sim., S, op. cit. p. 281. San Mateo, Bolivia (Garlepp). A. maga, E. Sim., 6" -, op. cit. p. 280. America Meridionalis. A. minor, Auss., 6", Verhandlungen & c , 1871, p. 206. Guiana. A. Insubillls, E. Sim., o*, op. cit. p. 282. San Mateo, Bolivia (Garlepp). A. ferlna, E . Sim., o*, op. cit. p. 282. Teffe, Amazonas. Genus AVICULARIA, Lamarck, 1818. Avicularia, Lamarck, Anim. sans Vert. v. 1818, p. 107. Syn. Aranea, Linnaeus ; DeGeer; Kleemann (in part). Mygale, Latreille; Walckenaer ; H a h n ; Lucas (in part). Type.-Figures of two males in 'Dissert. Gen. Metamorph. Insect. Surinam.' pl. xiii. (1726): Madame M . S. Merian. Generic Characters. A nterior row of eyes strongly procurved. Legs of first pair shorter than those of fourth. Four pairs of sternal sigilla visible-1st at base of labial plate; 2nd marginal; '3rd marginal; 4th sub-marginal. Posterior pair of spinners longer than ividth of sternum' Carapace nearly straight (in profile) behind the eyes. Patella and tibia iv. longer than carapace. Protarsus and tarsi i., ii., in, «w" |