234 AMERICAN SPIDERS AND THEIR SPINNINGWORK. 



brown. The ventral pattern is a broad blackish stripe between the dark spinnerets and 

 the epigynum, which is yellow. This organ (Fig. 11a) has a short scapus of nearly equal 

 length throughout, but somewhat widened at the tip, which is directed downward, in some 

 specimens so decidedly as to touch and seem to unite with the margin of the portulre. 



Male: Fig. 13. Smaller than the female, being 2.5 mm. long by 1+ mm. wide; the 

 ceijhalothorax is somewhat wider; the head more pointed ami less prominent. The legs 

 are longer, relatively, and thinner, without any special clasping apparatus or thickening of 

 tibia-II, but with some longer spinous bristles. The sternum in the specimen under 

 description is orange yellow, corresponding with the coloring of the surrounding coxse, 

 instead of jet black, as in the female. The palps are stout, and long for so small a species. 



Distribution: Throughout New England, in Massachusetts, Maine, Connecticut; in the 

 District of Columbia, and as far to the northwest as Hill City, Southern Dakota. (Marx.) 

 These widely separated points of collection indicate a wide distribution. 



No. 86. Singa maura (Hentz). Plate XIX, Figs. 8, 8a-d. 



1847. Epeira maura, Hentz J. S. B., v., p. 474; Sp. TJ. S., p. 114, xiii., 8. 



1889. Singa maura, Marx Catalogue, p. 549. 



1893. Singa maura, Keyseeling .... Spinn. .\merikas, Epeir., p. 283, xiv., 208. 



Female: Total length, 5.5 mm.; abdomen, 4 mm. long, 3 mm. wide; cephalothorax, 

 2.5 mm. long, 2 mm. wide. General colors of the fore part of the body are a rich brown 

 to yellow, and of the abdomen black, with folium marks of yellow. 



Cephalothora.x : A well rounded oval, high ; the fosse overhung by the abdomen ; tlie 

 base sharply sloping ; corselet grooves deeply marked ; cephalic suture distinct ; head prom- 

 inent; the base of the caput as high as the corselet; color a uniform glossy orange brown; 

 slightly jiubescent. Sternum shield shaped, slightly longer than wide ; sternal cones dis- 

 tinct, but not prominent; slightly raised, but flat in the centre; color a uniform orange 

 brown, in harmony with the legs and mouth organs. Labium subtriangular, not half as 

 high as the maxillge, which are as broad as long, cut squarely at the tips. 



Eyes: Ocular quad on a rounded, blackish eminence, especially prominent in front, 

 which makes IMF project beyond the mandibles ; the front decidedly wider than rear, the 

 side longest; MF manifestly larger than MR, and separated by 1.5 to 2 diameters, while 

 MR are separated by about a radius. Side eyes on separate tubercles, SF most pronounced, 

 and with dark brown base ; separated from each other by at least, or more than, a 

 diameter; about equal in size. SF removed from IMF by a space not greatly different from 

 that between MF. Front eye row decidedly recurved, the longer rear row aligned, but 

 appears slightly procurved when viewed from in front and beneath on the same line with 

 the front row ; the clypeus height is about 1.5 diameter MF. 



Legs: 1, 2, 4, 3; short, stout, uniform orange brown, except tips of feet, which are 

 black; well covered with yellowish hairs, and a few slight yellowish spines or spinous 

 bristles. The palps are armed and colored as the legs, with black tips heavily pubescent; 

 the mandibles conical, strong, colored as the corselet, slightly retreating towards the sternum. 



Abdomen: A well rounded oval, whose width differs little throughout; the skin is 

 glossy, covered sparingly with soft yellowish hairs; the dorsal folium marked in some 

 species by a whitish or yellow spot upon the base, followed toward the apex by two 

 similar and smaller patches, and still further by a transverse patch, or lunette. In other 

 specimens this is yellow, reticulated, and the terminal patches united by an irregular 

 median band. On either side are interrupted patches of yellow or cretaceous color. The 

 field of the dorsum is glossy, blackish brown, lighter in some specimens. The rounded 

 apex somewhat overhangs the spinnerets. The venter has a glossy, brownish rectangle, 

 outlined on either side by patches of yellow. The epigynum (Fig. 8b) is without an 

 elongated scapus, the median projection of the atriolum being simjily marked by a brown 

 chitinous ridge, semicircular in shape, with the concavity directed forward. 



Distribution: Hentz found the species in Alabama, Marx in the District of Columbia. 

 (Marx Collection.) 



