DESCRIPTION OF GENERA AND SPECIES. 



No. 87. Singa maculata (EMKRTON). Plate XIX, Figs. 9, 9a, 9b. 



1884. Siiii/ii niiinilala, EMERTON . . . . N. E. Ep., p. 323, xxxvii., 18. 



1889. Singa maculata, MARX Catalogue Described Arauete, p. 549. 



1893. Singa maculata, KEYSERLING . . Spinn. Amerik., Epeir., p. 285, xiv., 210. 



FEMALE: Total length, 3+ mm.; abdomen, 2 mm. long, 1.5 mm. wide; cephalothorax, 

 1.4 mm. long, 0.6 mm. wide. This is a small species, and although Etnerton's description, 

 as usual, is extremely insufficient, and he gives only a figure of the epigynum, the draw- 

 ings as above and description as below probably point to the species above named by him. 



CEPHALOTHORAX: Oval, with corselet margins well rounded; about one-fifth longer than 

 broad ; in front more than half as wide as in the middle ; corselet grooves tolerably dis- 

 tinct ; median fosse rather flat; cephalic suture well marked; the head prominent, some- 

 what depressed at the face, where it projects beyond the mandibles. Color of corselet 

 orange brown, with rather lighter shade upon base of caput, which deepens into black or 

 blackish around the ocular area. Sternum shield shaped, about or almost as broad as long; 

 orange brown color ; the labium and palps about as in S*Keyserlingi, brownish yellow in color. 



EYES : Ocular quad on a rounded eminence ; narrower in front than behind ; length 

 about equal to, scarcely greater than, rear width ; MR decidedly larger than MF ; MF 

 separated by about two diameters, and by the same or a little greater distance from MR, 

 which are separated by about 1.5 of their diameter; side eyes amber color, scarcely con- 

 tingent, about equal in size, upon a slight tubercle ; SR apparently larger than SF ; MF 

 separated from SF by about their area, the intervening space being somewhat greater than 

 between SF and MF; clypeus high, equal to about two or more diameters MF. The 

 forehead, viewed from the front, is high, and semicircular in outline. The front eye row 

 is slightly recurved, the rear row procurved. 



LEGS: Short, stout, brownish or orange yellow; sparsely pubescent; without annul! ; 

 with a few stout bristles, or bristlelike spines. Palps as the legs; mandibles slightly 

 inclined backward ; orange brown. 



ABDOMEN : An oval, longer than broad ; dorsum arched, and apex as thick as the base ; 

 the spinnerets distal, or placed immediately beneath the rounded apical wall; skin glossy, 

 and rather inclined to silvery in alcoholic specimens ; covered with grayish pubescence. 

 The dorsum is marked by a broad folium, with blackish outlines, limited by a dark 

 transverse band at the rounded part of the apex ; four prominent impressed spots mark the 

 central portion of the dorsum. The sides, along the base, are marked by a little longitu- 

 dinal patch of yellow or cretaceous. At each shoulder of the dorsum is a circular spot of 

 black, almost resembling an eye; the folium is cut off squarely at the apical part of the 

 dorsum, leaving a blackish, semicircular, lateral band, beyond which is a reticulated narrow 

 band of yellow. The ventral pattern is a black quadrilateral, bordered on all sides by a band 

 of yellow, including the spinnerets, which are of like color. The epigynum (Fig 8b) in the 

 specimen in my possession is much damaged, and I give the organ as figured by Emerton. 



DISTRIBUTION : New England (Emerton) ; District of Columbia. (Marx Collection.) 



GENUS CYRTOPHORA, SIMON, 1864. 



The chief distinguishing characteristics of Cyrtophora are the eyes and abdomen. The 

 eight eyes are arranged in three distinct groups, as in Epeira, but the side eyes, instead 

 of being contingent or approximated, are, relatively, widely separated, thus resembling some 

 of the species of Tetragnatha, The space between the sidefront and midfront eyes is but 

 little, if any, greater than that between the two midfront eyes ; the eye rows are both 

 slightly recurved. The cephalothorax is short and rather feeble, the head, relatively, 

 long and powerful. The sternum is triangular, the labium low, the maxillae wide at 

 the tips and compressed at the shank, and somewhat longer than wide. The legs are in 

 order of length 1, 2, 4, 3, and, for so small a species, quite stout, but rather scantily 

 armored. The abdomen is conical, tuberculated, and carried in a position nearly perpen- 

 dicular to the plane of the cephalothorax. 



