DESCRIPTION OF GENERA AND SPECIES. 195 
but eight tubercles to Stellata and twelve to Nobilis. Occasionally I find specimens with 
one less or more than the normal number of eleven or thirteen, this asymmetry always 
occurring in the row across the apical wall, as in Plate XIII., Fig. 9, x. To Epeira cerasize 
and E. iris, which I regard as one with the above, he also assigns twelve tubercles, I haye 
both the male and female of this variety in large numbers ftom Georgia, collected from 
substantially the same territory as M. stellata. There is much variety in dorsal patterns 
among immature specimens, a number haying a marked broad band of plumose hairs across 
the middle, as in Plate XIII., Fig. 9. The adult male corresponds with that of M. stellata, 
except in the additional two small tubercles in the apical row. 
No. 52. Marxia grisea, new species. Plate XIII, Figs. 10, 10a, 10b. 
Femarte: Total length, 8 mm.; cephalothorax, 4 mm. long, 3.5 mm. wide; face, 2 mm. 
wide; abdomen, 6.5 mm. long, 5 mm. wide. I have seen but one specimen of this interest- 
ing species. It closely resembles Marxia stellata, at first glance, in its general appearance, 
but the clypeus is lower and the arrangement of abdominal tubercles is entirely different. 
The prominent frontal cone which marks M. stellata is wanting, and the median row of 
four aligned tubercles along the apex is peculiar to this species. The shoulder cones also 
are single and not double. 
CrpraLorHoraAx: A rounded oval, truncated behind, flattened and sloping from the 
crest backward; the cephalic suture deep, the corselet grooves distinct, the fosse a wide and 
rather deep lunette overhung by the abdomen. The head is rather quadrate, square in 
front, divided into two low ridges by a lateral depression passing just behind the ocular 
quad, giving the head a lumpy appearance. Two small black circular spots, arranged on 
either side of the median line, mark both the anterior and posterior part of the caput, the 
latter being in the suture. The corselet is covered with yellowish hairs and the head more 
sparsely with the same; color yellowish brown. Sternum shield shaped, with conical 
elevations in front of coxee-I, III; elevated in the middle, which is marked by a black pelt 
shaped figure; the margins are yellowish brown. Labium triangular, wider than long; 
maxille bluntly triangular at the tip, rounded at the sides, and somewhat longer than wide. 
Eyrs: Ocular quad on a high prominence, the front about equal in length to the sides 
and slightly wider than the rear; MF separated about 1.5 diameter; MR, which are slightly 
smaller, separated by 1.5 diameter. Side eyes upon decided tubercles; SR as large as SF, 
from which they are separated by at least a diameter, and are placed behind, well to the 
side. MF are removed from SF by about 1.5 the area of MF. The front row is slightly 
procuryed, as is also the longer rear row. The clypeus height is about two diameters MF. 
Lees: Order of length, 1, 2, 4, 3; yellow, with brownish bands at the tips of the joints 
and the middle of the femora. They are heayily clothed with pubescence, with bristles, 
and numerous white spines with brown bases. The palps are heavily armed with gray 
bristles, especially upon the last two joints, and colored as the legs. The mandibles are 
conical, well separated at the tips, where they are dark brown, the bases being yellowish 
brown, glossy, but provided with yellowish gray bristles. : 
Aspomren: A rounded oval, heavily covered with yellowish gray pubescence and 
plumose hairs. The dorsal margins are marked by ten tubercles arranged in an are, con- 
taining five on each side. Four others are arranged along the median line of the apical 
half of the dorsum, passing over the apex one above another, the anterior one being upon 
the dorsal field. (Fig. 10a.) There are thus fourteen tubercles in all. There is no tubercle 
upon the middle front of the base as in M, stellata. The color is yellow, with a scalloped 
or dentate folium lightly edged with brown, and a dark median band passing along the 
entire dorsal fiekl, which widens at the apex, over which it passes to the spinnerets. The 
venter is an interrupted yellowish broad band. The epigynum (Fig. 10b) scapus has a wide 
triangular base, with a long stalk, flat on lower surface, of equal width for most of its 
length, and terminating in a rounded point. 
Distripution: Biscayne Bay, Florida. (Marx Collection.) 
