226 AMERICAN SPIDERS AND THEIR SPINNINGWORK, 
Femare: Total length, 7 mm.; cephalothorax, 2.2 mm. long; width in middle, 1.6 
mm.; width in front, 0.9 mm.; abdomen, 5.1 mm. long, 3.6 mm. wide. The species differs 
from ©. turbinata in its genital organ, but may be at once easily distinguished by the 
absence of the two shoulder humps. 
Crernanornorax: Corselet, mouth parts, and sternum uniformly brown, or blackish 
brown; caput sometimes a little lighter color; the latter is covered freely, the former 
me sparsely, with gray hairs; dorsally flat; caput not higher than corselet; median fosse small; 
corselet grooves not deep; cephalic suture distinct. Labium obtusely pointed, and maxillee 
broader than long. 
Eysrs: Ocular, quad elevated; wider in front than behind, and decidedly longer than 
wide; MF separated by about 1.5 diameter, larger than MR, which are separated by about 
or less than one diameter. SF removed from MF by about the area of MI; side eyes not 
contingent; SF larger than SR, and not much less than MF. Clypeus margin separated 
from MF by 1.5 to 2 diameters; front row recurved, rear row longer, nearly aligned, or 
even a little recurved. 
Leas: 1, 2, 4, 8, as follows: 7.6, 6.7, 6.3, 4.5 mm.; color yellow, with decided brown 
apical and median annuli; armed with hairs, bristles, and long, thin, acute spines. The 
mandibles retreat backward? 
Anpomen: A rounded oyal; at the apex a more or less conical protuberance, which is 
directed upwards; color yellowish white, or whitish, with brownish side, and a dark longi- 
tudinal folium, which is sometimes indistinct, compressed about the centre, and irregularly 
indented on the edges. The venter black, with a large angulated long white spot on each 
side; four white small spots near the base of the spinnerets. 
Mae: ‘otal length, 3.6 mm.; cephalothorax, 0.2 mm. long, 1.6 wide in the middle, 
0.7 mm. in front; abdomen, 1.8 mm. long, 14 mm. wide. The cephalothorax is quite 
pointed in front, overhanging the clypeus, dorsally flat, without grooves. Mandibles much 
shorter and thinner than patella, one directed backward. The legs have long spines; 
tibia-II not thickened, and has no special clasping armature. Coxa-I has a small toothlike 
tubercle; coxa-IV has two vertical, sharp, and strong spines. On the outside of the maxillee 
is a pointed, spinelike tubercle. 
Disrrisution: Numbers of this species have been collected in California, where they 
appear to be abundant, especially in the southern parts. It is found in Utah (Professor 
Orson Howard), and I haye taken it in Florida. Emerton appears to have found it in New 
England. The facts of distribution, as thus far reported, would seem to indicate the intro- 
duction of the species by immigration from Europe. 
No. 78. Cyclosa Walckenaerii (Keysrrrine). Plate XVII, Figs. 1, la-d, 
1892. Epeira Walckenaerii, Knyseruine . Spinnen Amerikas, Epeirade, p. 98, v., 85. 
Femate: Total length, 6.5 mm.; cephalothorax, 2.5 mm. long, 1.7 mm. wide; abdomen, 
4 mm. long, 2.5 mm. wide. 
Crratotnorax: Oval, squarely truncate at the base, high in the middle, the sides 
rounding to the crest, in which is located the fosse, a deep circular pit; color glossy brown, 
with grayish pubescence; corselet grooves indistinct; the cephalic suture, on the contrary. 
is so strongly marked that it presents almost the appearance of a neck, the suture passing 
entirely around the corselet. (Fig. 1b.) The head is thus quite divided from the central 
portion of the corselet, the anterior being flattened into the necklike connection above 
referred to. The head is rounded, somewhat quadrate or bluntly triangular; the vertex is 
nearly as high as the crest of the corselet, slightly depressed at the face, which is broad ; 
the color is brown, interspersed with gray hairs. The sternum is an elongated shield, 
longer than wide, the apex prolonged and rounded, the sternal cones strongly marked, rising 
into high rounded knobs before coxee-I, with a smaller cone between these two; these are 
all colored yellow, as is the apex, and a connected median band in the centre of the 
shield, giving thus a curious lumpy appearance to the organ. (Fig. la.) Outside of these 
