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Show 746 REV. O. P. CAMBRIDGE ON NEW ARANEIDEA. [Nov. 1, which is of a semicircular or crescent shape. The spinners are short, strong, and compactly grouped, the four forming the superior and inferior pairs completely concealing (if they existed) the normal third pair. An adult female of this most remarkable Spider was received lately from Santa Fe, Minas Geraes, Brazil, where it was captured by Mr. Henry Rogers, after whom I have great pleasure in naming it. The absence of a labium stamps it at once as unique among our yet recorded Araneidea. Some systematists might consider this character of sufficient importance to warrant the foundation of a separate family ; but, considering it only of generic value, I have based upon that and other strong positive characters the present new genus. The Ant-like appearance of this species has already been remarked upon (introd. suqjrd). The great development of the clypeus, with the two horns on the caput, give it a very striking appearance, much resembling the broad muzzle and head of a Bull. An adult female of a very closely allied (if n; t identical) species is in the British Museum, captured at Ega, Brazil, by Mr. Bates; it is, however, smaller, and may possibly prove to be distinct. EXPLANATION OF PLATE XLIV. Fig. 1. Stenochilus hobsonii, o", p. 729. a. Profile of cephalothorax. b. Undersido of cephalothorax. c. Fore right view of eyes and falces. d. Extremity of tarsus. e, f. Palpus in two positions. g. Natural length of Spider. 2. Cydippe unguiculata, c? , p. 731. a. Profile of cephalothorax. b. Underside of cephalothorax. c. Fore right view of eyes and falces. d. Extremity of tarsus. e. Natural length of Spider. f, g. Palpus in two positions. 3. Sphecozone rubescens, $, p. 733. a. Profile of cephalothorax. b. Fore right view of eyes and falces. c. Underside of cephalothorax. d. Extremity of tarsus. c. Natural length of Spider. /, g. Palpus in two positions. 4. Cephalobarcs globiceps, $, p. 735. a. Profile of cephalothorax. b. Underside of cephalothorax. e. Fore right view of eyes and falces. d. Extremity of tarsus. e. Natural length of Spider. f, g. Palpus in two positions. 5. Moneta spinigera, $ , p. 736. a. Profile of cephalothorax. b. Underside of cephalothorax. <*. Fore right view of eyes and falces. d. Natural length of Spicier. |