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Show 728 REV. O. P. CAMBRIDGE ON N E W ARANEIDEA. [Nov. 1, Family HESVERID^E, Leach. Subfamily PAMPHILINJS. Under this heading I would include all the genera having a short thick club of the Pamphila type to the antennse, and terminating at a right angle in a short pointed hook, such as Proteides, Carystus, Pamphila. Genus PAMPHILA, Fabricius. 1. PAMPHILA MATHIAS. Hesperia mathias, Fabricius, E. S. Suppl. p.433. n. 289, 290(1798). " Gujerat, on flowers." 10. On some new Genera and Species of Araneidea. B y the Rev. O . P. C A M B R I D G E , C.M.Z.S. (Plate XLIV.) Among the Spiders described in the present paper are several of the greatest possible interest to the scientific arachnologist. We find one (Stenochilus hobsonii) presenting the almost unique character of possessing but two spinners* ; another (Aphantochilus rogersii), from Minas Geraes, Brazil, appears to be entirely without the labium, a portion of structure the absence of which is, I believe, unknown in any genus of Araneidea at present characterized. The resemblance of this Spider to some of the large-headed, horny, spine-bearing Ants of South America is very striking, and forms an unmistakable instance of similarity between individuals of two very widely separated groups of the Articulata. This similarity no doubt carries with it some advantage to one or the other-probably to the Spider, as being the most likely of the two to derive advantage from such a resemblance-which doubtless sums up a long succession and progress of small advantages. It is unfortunate that the term mimicry should have been given to this and other like curious resemblances, since that term seems to many naturalists to imply consciousness or volition on the part of the creature supposed to be the one which resembles another; and this certainly unfounded implication casts discredit upon the deep natural truth which the resemblance embodies. Another of the Spiders (Moneta spinigera) described below, is interesting as affording a tolerably certain clue to the family affinities of a small group (Scytodes and Omosita) which has appeared to m e widely separated hitherto from the Theridides, with which family the genus Moneta seems to connect it. 1 observe, however, that in a work on European Spiders just published, Dr. T. Thorell, of Upsala, places this group side by side with the family * Another instance of this peculiarity is found in the genus Palpimanus (Dufour). |