DESCRIPTION OF GENERA AND SPECIES. 169 



wliat cordate ; color dark brown, well covered with hairs, especially on the margin. Labium 

 subtriangular, half as high as maxilla?, which are yellowish brown, subtriangular at the 

 base, as is the labium. 



Legs: Order 1, 2, 4, 3; dark yellow, strongly annulated both at tips and middle of the 

 joints, with wide dark brown patches ; the feet black ; armed with black or blackish brown 

 spines and dense white haire, which are longer upon the bases of the femora and under- 

 neath and inside thereof; palps colored and armed as the legs; mandibles strong, dark 

 brown, conical. 



Eyes : Ocular quad on a high, rounded, brown eminence, the rear manifestly wider than 

 front and equal to sides ; MF smaller than MR and separated by 1.5 to 2 diameters ; MR 

 separated by about 1.3 diameter. Side eyes placed on tubercles, contingent, SF somewhat 

 larger than SR. MF separated from SF by more than their area; clypeus high, being as 

 much as, or more than, the area of MF, or about three times the diameter of MF ; front 

 row slightly recurved, the longer hind row procurved ; the space between SR and MR equal 

 to about 1.5 the area of MR. The ocular quad is free from hairs, and the long gray hairs 

 which so profusely cover the interspaces of the ocular area in Epeira carbonaria are but 

 slightly represented in the specimen under description. 



Abdomen : A long oval, narrowed at the base as well as apex ; dorsum arched to the 

 spinnerets, which are distal, overhanging the cephalothorax at the base. The ground color is 

 yellow, heavily clothed with white hairs, thickest on the base in front and upon the 

 sides; the folium is a broad, brown, scalloped band passing from the base, slightly narrow- 

 ing to the apex ; in the centre is a yellow herring bone marking (Plate V., Fig. 9), with a 

 broad arrow at the base and tapering towards the apex ; color yellow, modified l)y tlie heavy 

 pubescence. The sides are yellowish brown, clothed heavily witli white pubescence, wliich 

 passes down to the venter, where the white hairs are mingled with brown. Tlie ventral 

 band is a rectangular brown patch, with yellow margin and a broad yellow median band ; 

 spinnerets brown. The scapus of the epigynum is tolerably long, of almost equal width for 

 about two-thirds of its length, when it tapers to a point. It is narrower relatively than 

 that of Epeira carbonaria, grooved upon the lower side, and covered with strong white 

 hairs. 



Male : The male differs little in general characteristics from the female ; the head is 

 more attenuated at the face ; the color of the cephalic corselet suture is dark grayish 

 brown ; the bristlelike hairs upon the abdomen are long and intermingled with numerous 

 black and yellow bristles, the herring bone median pattern is well defined and resembles 

 that of the female. The legs are yellow or yellowish brown, strongly annulated, but not 

 quite so widely as the female. The metatarsi are well provided with spines, which appear 

 also on the under sides, especially of first and second legs. The tibia? of second legs are 

 curved, very little thickened toward the tip, and provided with additional clasping spines, 

 which are strong but not numerous, arranged in two rows. The tip of the joint has about 

 four of tlieso black spines, and on the inside is a strong corneous tooth or notch, wliich has 

 probably been the base of a long bristle. This part is similar to Epeira carbonaria, but not 

 quite so strongly developed. The tibia about equals in length the metatarsus. 



Distribution: I have seen but one pair of this species apparently identical with that 

 which Count Keyserling has described, and this was collected in Clear Creek County, Col- 

 orado. (Marx Collection.) 



No. 17. Epeira bivariolata Cambridge. Plate v., Figs. 5, C, 5a, 6a. 



1889. Epeira bivariolata, Keys, in lilt. . Marx Catalogue, p. 543. 



1890. Epeira bivariolata, Cambridge . . Biolog. Centrali-Amer., Aran., p. 27, pi. vi., 15. 

 1892. Epeira bivariolata, Keyserling . Spinn. Amerk., iv., Epei., p. 100, tab. v., 74. 



Female: Body length, 11 mm.; abdomen, 7 to 8 mm. long, 7 mm. broad; cephalo- 

 thorax, 5 mm. long, 3 mm. wide. The general colors in alcoholic specimens are yellowish 

 brown for fore part of body, and yellow with brown markings for the abdomen. In life, 



