230 AMERICAN SPIDERS AND THEIR SPINNINGWORK. 



Cephalothorax : A rounded oval, almost as broad as long; corselet highest in the 

 centre, sloping sharply behind from the caput to the face; corselet grooves not distinct; 

 cephalic suture marked, thus sharply delineating the caput ; fosse, a longitudinal pit ; color 

 orange yellow, darker on the centre of the caput to the face, which is blackish. Sternum 

 shield shaped, manifestly longer than wide; sternal cones well marked, slightly pubescent; 

 color orange yellow to yellow, like the surrounding coxse; labium subtriaugular, widest at 

 the base; maxilte as wide as long; rather obtusely triangular at the tip, and, like the 

 labium, yellow in color, with darker shades at the base. 



Eyes: Ocular quad on a blackish eminence, wider in front than behind, the sides 

 somewhat longer than front ; MF somewhat larger than MR, and separated by a little more 

 than one diameter; MR by not more than a radius; SR on slight tubercles; SF longer than 

 SR, and separated by about a diameter of the latter, the dividing space being greater than 

 that between SR. SF removed from MF by a space but little greater than that which 

 separates the latter; SR removed from MR by a space manifestly greater than that which 

 separates SF and MF. Front row recurved, rear row slightly procurved, or aligned ; clypeus 

 height about one diameter MF. 



Legs: 1, 2, 4, 3; stout; yellow, with slight tinge of orange; the tips of the joints 

 annulated with brown ; the armature is more decided than with many species of Singa, the 

 bristles passing into light, long, yellowish spines. The palps are colored as the legs; the 

 maxilla} conical, strong, brownish yellow color, as the sternum ; curved at the base, but not 

 extending beyond the eyes, which, however, project slightly over the fiice. 



Abdomen: A short oval, thickest at the base, and diminishing somewhat toward the 

 apex; the entire dorsal field is a reticulated cretaceous color, with an indistinct marginal 

 band, which is strongest on the front, and which continues along the side. A black 

 irregular line extends along the median, with branches to the dark impressed dots, which 

 are increased to four at and along the apex. The sides are yellowish white, merging into 

 brown, the whole beautifully reticulated. The ventral pattern a quadrilateral patch of 

 yellowish or testaceous color, extending to the spinnerets, which are light brown. The 

 epigynum (Fig. Ic) has a short spooned scapus, very wide at the tip, extending to the 

 margin of the atriolum, leaving the portuhe well displayed on either side. 



DisTKiBUTio.s- : Biscayne Bay, Florida ; District of Columbia, where it was taken in 

 June by Dr. Marx, to whom I am indebted for tlu3 single specimen here described. I have 

 adopted the name suggested by him, which was given in honor of one of his lady friends. 



No. 82. Singa Keyserlingi, new species. Plate XIX, Figs. 2, 2a-c. 



1889. Shiga rubella, IMai!x Catalogue, p. 549 (Epeira rubella, Hentz). 



1893. Shiga rubella, Keyserling .... Spinn. Amerik. Epeir., p. 284, xiv., 209. 



Female: Total length, 5.0 mm.; cephalothorax, 2+ mm. long, 1.5 mm. median width; 

 at the face, nearly 1 mm. ; abdomen, 4 mm. long, 2 mm. broad. Dr. Marx in his Catalogue 

 considers' this species identical with Hentz's Epeira rubella, Sp. TJ. S., page 120, pi. 31, Fig. 

 22; but I find it impossible to agree with this opinion. The eyes are not unlike, and the 

 broad, median, longitudinal band which traverses the abdomen at least suggests the folial 

 stripe of this species. But apart from difference in general form, the characters of the 

 legs, and especially of the maxillse, in Hentz's drawings are so wholly unlike those of the 

 specimens in hand that they cannot be attributed to the same species. I have, therefore, 

 felt it necessary to propose a new name. 



«ephalotiiorax : Oval, corselet ratlier high, sloping behind; base of 'caput raised 

 above level of corselet, but sloping to the face; fosse a lateral pit; corselet grooves suffi- 

 ciently distinct; cephalic suture decided, giving the head a marked delineation; color 

 reddish brown; skin glossy, with slight pubescence; the caput a blackish brown to blackish, 

 smooth, glossy, a little pubescence. Sternum shield shaped; somewhat longer than broad, 

 with sternal cones before; cut square in front; a broad, yellow, median band, with a margin 

 of blackish brown ; slightly pubescent. Labium triangular, color dark brown, less than half 

 tlie height of maxillre ; maxilla; as wide as, or wider than, long ; sijuarish at the tip. 



