DESCRIPTION OF GENERA AND SPECIES. 243 
upon the inside of femora-III, female, appears to be wanting. The palpus (Fig. 4a) has the 
radial joint at least three times longer than the cubital, and nearly twice as long as the 
digital. 
Disrrisurion: This beautiful species is one of the most abundant inthe neighborhood 
of Philadelphia, and is widely distributed throughout the United States. My collections 
show that it inhabits the Atlantic Coast throughout, and the Mississippi Valley. I have 
collected it as far to the southwest as Texas. I have no collections from the Pacific Coast, 
but it will probably be found thereon. If we accept the examples placed in the synonyma 
as quite identical with A. venusta, the species is distributed throughout Central America 
and the northern States of South America, 
No. 95. Argyroepeira argyra (WatcKENAER). Plate XXIV, Figs. 2, 3. 
1842. Tetragnatha argyra, WALcKENAER, Ins. Apt., ii., p. 219, pl. 19, Fig. 1. 
1873. Linyphia ornata, Taczanowskt . Horee Soc. Ent. Ross., p. 11. 
1880. Meta argyra, Keyseruinc . . . . Neue Spinnen a. Amer., i., p. 543. 
1893. Argyroepeira argyra, Keyseruina, Sinnen Amerikas, p. 343, xviii., 253. 
Frematr: Total length, 7.5 to 8 mm.; cephalothorax, 3 mm. long, 2.6 mm. wide; abdo- 
men, 6 mm. long, 8 mm. wide. The specimens in my possession are much changed by 
alcohol, but the living colors appear to be greenish yellow, brown, and metallic white, 
resembling those of A. venusta. 
CrrHatorHorAx: Oval, somewhat flattened; a deep triangular fosse; corselet grooves 
not distinct; cephalic suture pronounced; caput elevated, lowly arched; yellowish brown 
(in alcohol), scarcely pubescent. Sternum cordate (Fig. 2a), as wide as long; cones distinct; 
raised in the middle, especially opposite the labium; brown, covered with long, black, 
curved bristles. Labium compressed at the shank, widened at the subtriangular tip; half as 
long (or less) as the maxilla, which are compressed below, and widened at the tip, and 
decidedly longer than wide. 
Eyes: Fig. 26. Ocular quad longer than wide, wider behind, eyes about equal; MF 
separated about one diameter, MR 1.5. MF separated from SF about 1.5 the alignment of 
MF; SF propinquate, about equal in size, but smaller than those of the quad, and on slight 
tubercles; clypeus nearly the alignment of MF high; front row recurved, rear row very 
slightly procuryed. 
Leas: Order, 1, 2, 4, 3, as follows: 23.1, 17.9, 14.5, 8.9 mm.; they are not stout, gradu- 
ally diminish to the tarsus, the joints long, except the patelle, which are relatively short; 
they have few spines, but are freely clothed with long bristles, almost plumose beneath ; 
color in alcohol yellowish, with slight tinge of green; in life the latter color probably pre- 
dominates. 
Aspomen: Cylindrical, thicker at the base, which overhangs the cephalothorax. The 
dorsal folium is margined by a broad band of silver, which covers the base and extends in 
wedge shaped bands along the sides; indeed, the ground color might be described as silver, 
and the pattern (see Fig. 2) said to be outlined by interrupted longitudinal fillets of 
brown. ‘he venter is blackish brown, with silvery marginal bands; the epigynum (2c) is 
large, conical, projecting forward, thickly clothed with hair. 
Mate: Fig. 3. In general form and colors closely resembles the female, which it 
almost equals in length, the largest specimens being 7 mm. long. The digital bulb (8a, 3b) 
is large, globose, longer than the radial and cubital joints together, the latter being about 
one-half longer than the former. ; 
Disrripution: Southern California, from which numerous specimens haye been obtained 
from Dr. Blaisdell. Outside the United States the species inhabits Mexico, the Antilles, 
Central America, and probably South America, in the northern provinces. It is one of the 
most beautiful of our indigenous spider fauna. I have no account of its spinning and 
cocooning habits, but these will probably be found to resemble closely those of its con- 
gener A. venusta, which I have fully described. 
