198 AMERICAN SPIDERS AND THEIR SPINNINGWORK, 
much narrowed at the tips, parallel curved on the anterior surface, receding; dark brown 
at the base, and yellowish brown beyond. 
Appomen: As wide as or wider than long, forming a well rounded oval or irregular 
hemisphere, which is thickest at the base, where it rises up into marked height. (Fig. la, 
side view.) The crest is surmounted by two large conical tubercles. The front overhangs 
the cephalothorax, is wide and high; the apical half is arched towards the spinnerets, which 
are placed somewhat beneath the apex. The dorsal field is without a folium, is bright 
yellow, with longitudinal lines passing backward along the muscular pits, which are prom- 
inent; in some specimens the lines traverse both sides, widening to the venter, giving this 
part a striped appearance. The front is olive or blackish brown, mottled with yellowish, 
irregular spots; surface glossy, extremely rugose, marked with numerous black circular pits, 
arranged laterally in semicircles, curved backward; these pits are found along the sides and 
apex, though rather small. The venter has a broad yellow patch, with four or five black 
circular spots arranged longitudinally, and a wide, brownish, median band, which is wanting 
in some specimens; the epigynum (Fig. 1b) shows a long atriolum, with a tonguelike 
scapus, short, rounded, and wide at the tip, folded down flat against the genital cleft, almost 
as though it were attached thereto; the scapus is brown, the front of the atriolum on either 
side of the portulze yellow. In one specimen (Fig. 1c) in the Marx collection the abdomen 
is yellowish brown, smooth, showing only two indentations, and the shoulder humps, 
instead of being well in the front, as above described, are set off at the sides, a result, 
probably, of the gravid condition of this female. 
Disrrisution: I have received a number of this species, females, from California, where 
it appears to be common (Mr. S. R. Orcutt, Mrs. Eigenmann, Mrs. Smith, Dr. Davidson, 
Dr. Blaisdell); and cocoons (Vol. IL, page 98) from various localities, ranging from Fort 
Yukon, Alaska, to San Diego. Becker described it from Louisiana, and Hentz’s original 
description is from Alabama. Dr. Marx records it in the District of Columbia and Virginia. 
It is, no doubt, distributed throughout the entire Southern States, and along the Pacific 
Coast in California. Have collected it in Pennsylvania. 
No. 55. Ordgarius bisaccatus (Emerroy). Plate XII, Figs. 2, 3. 
1884. Cyrtarachne bisaccatus, Emerton . N. E. Sp., p. 326, pl. xxxiy., Fig. 11. 
1889. Cyrtarachne bisaccata, McCoox . . Am. Spid. and their Spinningwork, Vol. II., p. 95. 
1889. Ordgarius bisaccatus, Marx . . . Catalogue, p. 541. 
1892. Ordgarius bisaccatus, Keyspruinc. Spinn. Amerik., Ep., p. 42, ii., 35. 
Frmate: Total length, 10 mm.; cephalothorax, 3 mm. long, 3 mm. wide in the middle, 
and 2 mm. in front; abdomen, 6 mm. long, 7 mm. wide; in front more than half as broad 
as in the middle. It may at once be distinguished from O. cornigerus by the absence of 
shoulder humps. 
CrrnAtotHorax: Rounded at margin; fosse concealed behind the face, which rises 
from the eye space into an exceedingly high subtriangular vertex, terminated on either 
side of the summit by two rectangular or castellated prominences, cleft at the top into two 
obtusely pointed cones, the inner ones the longer. The entire face is covered with numer- 
ous warts, which extend to the summit of the vertical prominences; corselet grooves dis- 
tinet ; cephalic suture indistinct; color of corselet behind, yellow; around cephalic suture, 
brown; forehead and head again yellow. Sternum shield shape, somewhat longer than 
wide; sternal cones in front of coxee-I and III; color yellow; slightly pubescent; base with 
a semicircular depression next the labium, which is subtriangular, half as long as the 
maxillze, which are gibbous, apparently a little longer than wide, and colored as the sternum. 
Eyes: Ocular quad on a rounded eminence; rear slightly wider than front, and the 
sides shorter than either; MF larger than MR, separated by about 2.5 to 3 diameters, while 
SR are separated by three or more; rear eyes on tubercles, almost contingent, not greatly 
differing in size; the space between SF and MF 1.3 area of latter, or about twice or less 
the intervening space; both rows procuryed; the clypeus is high, the margin separated 
