ease ee ee eS a. Te anil i fai 7 -* - 
DESCRIPTION OF GENERA AND SPECIES. 227 
cones the color is brown, and there is a slight gray pubescence. The labium is wide, tri- 
angular at the tip, which is yellow, the base being somewhat compressed, and brown; 
maxillee as wide as or wider than long, the tips obtusely triangular, directed toward one 
another; colored as the labium. 
Kiyns: The ocular quad has the front eyes upon a semicircular prominence, is higher 
in front, where it projects over the clypeus; the quad is decidedly longer than wide, wider 
in front than behind; MF larger than MR, separated by about 1.3 diameter, while MR are 
almost contingent. The side eyes are on elevated bases rather than tubercles; scarcely con- 
tingent; SF larger than SR; MF are separated from SF by about 1.3 their area, or at least 
twice the intervening space of MF; clypeus height about one diameter MF; front eye row 
much recuryed; the longer rear row slightly procurved or aligned. 
Lunes: 1, 4=2, 3; stout, yellow, with blackish brown apical annuli, and lighter median 
ones; provided freely with bristles and hairs, and rather sparsely with stout black spines; 
the palps have lighter color than the legs; the mandibles are long, parallel, as wide at the 
tips as at the base, where they are well arched; somewhat receding; color glossy brown, 
flecked with yellow. 
AspomrEn: Oval, widest at the base, where it is marked by two conical shoulder 
humps; the front is rounded, somewhat narrowed, and overhangs the cephalothorax; the 
apex is marked by a wide conical hump, which is cleft at the top, and has a similar 
smaller cone on either side; the dorsum is yellow, interspersed with brown, covered with 
silvery white hairs; an indistinct folium, with a yellowish border inclosing a blackish 
rectangular pattern, lies between the shoulder humps and the apical cones; the yenter is 
conical, the spinnerets being placed at the apex, underneath the middle part of the abdo- 
men; the color (Fig. la) is brown, with a circular ring of yellow spots around the base of 
the spinnerets; the epigynum (Fig. 1b) presents a wide, semicircular, arched atriolum, 
yellow, with grayish hairs, from the centre of which issues the scapus, which is wide at 
the base, narrowed and rounded toward the tips, which slightly overhang the genital cleft. 
It apparently lacks one moult of maturity. 
Marin: Plate XVII., Fig. 2. Smaller than the female. The cephalothorax has the 
same general characteristics, but the interspace between the head and the corselet is not so 
strongly marked. The head is well elevated. The abdomen is a rectangular ovate; the 
dorsal cones smaller than in the female; the color is black, with cretaceous spots at the 
base and near the middle. The legs are yellow, annulated with a light brown; provided 
with long, aculeate spines; without any special clasping apparatus upon tibia-II. I cannot 
positively identify the individual here figured as the male of Cyclosa cervicula, but consider 
the identity as highly probable. 
Disrrrution: Two specimens, female, from California, one of them from Magdalena 
Bay (Mr. C. H. Townsend); a male, San Diego, California, in the Marx Collection. Keyser- 
ling described the species from Guatemala specimens. 
No. '79. Cyclosa bifureca McCook. Plate XVII, Figs. 9, 10. 
1887. Cyrtophora bifurea, McCook . . . Proceed. Acad. Nat. Sci., Phila., p. 342. 
1889. Cyclosa bifurea, McCook . . . . Amer. Spiders and their Spinningwork. 
1889. Cyclosa bifurea, Marx ..... Catalogue. 
Frmate: Total length, 7.5 mm. ; cephalothorax, 3 mm. long, 2.3 mm. broad; abdomen, 
6 mm. long, 3 mm. broad. 
Crrnatormorax: The corselet high and well rounded; the fosse deep, the grooves well 
defined ; cephalic suture deep and decided, sharply defining the head from the corselet; the 
head is on the level of the corselet, and covered with grayish white hairs. The color is 
green, fading out in alcohol to a light yellow. The sternum is shield shaped, darkish 
brown along the margin, with irregular greenish median and radiating bands; flattened ; 
covered sparsely with gray hairs, pointed at the apex; almost as wide as long. The labium 
large, triangular; the maxille rounded, about as wide as long; color of both the last named 
organs green. 
