368 ARANEIDEA. 
4. Modisimus putus. (Tab. XXXIV. fig. 21, ¢.) 
Modisimus putus, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. 1. p. 148, t. 20. figg. 6,6 a-e (9). 
Type, 2, in coll. Godman & Salvin. Total length 2:25 millim. 
Hab. Mexico, Teapa (H. H. Smith 3). 
PHYSOCYCLUS. 
Physocyclus, E. Simon, Hist. Nat. Araign. 2, i. p. 470 (1893). 
Decetia, O. P.-Cambridge, Biol. Centr.-Amer.,; Arachn. Aran. i. p. 234 (1898). 
Type of Physocyclus, P. globosus, Taczanowski (=P. gibbosus, Keyserling), Cayenne ; that of Decetza, 
D. incisa, O. P.-Cambridge, Mexico. 
Eyes eight. Mandibles striate in both sexes. The lateral and central posterior eyes separated into two 
distinct groups. 
The species occurring in our collection may be recognized as follows :— 
Males. 
Size smaller. Tooth on mandibles rather shorter, seen in profile. 
Cusp-like granulations on the front of the mandibles much less 
numerous, 10-12 on each. Bulb of palpus much smaller, globular- 
reniform, its process broader, apically truncate, corrugated along © 
the inner margin, with a short spur near the apex, but without a 
black concave chitinous lobe near its base in front . . . - - - globosus, Tacz. 
Size larger. Tooth on mandibles longer. Cusp-like granulations on 
the front of the mandibles much more numerous, 30-40 on each. 
g 
= 
Bulb of palpus much larger, inflated-globular, its process narrower, 
apically tapering to a blunt point, without a spur near its apex, 
but with a conspicuous, black, concave, chitinous lobe near its base 
infront... ee ee eee ee ew we ew ee.) Gugesi, E, Simon. 
Females. 
Carapace deeply grooved in the middle and with a longer or shorter 
= 
conical cusp posteriorly, its point slightly inclined forward, opposed 
by an oval chitinous plate on the abdomen. . . . . globosus. 
6. Carapace grooved in the middle, but evenly rounded behind, without 
cusp or plate on the abdomen. 
1. Size much larger. Vulval processes very conspicuous, the anterior 
one directed backward, bluntly pointed in profile, bifid to the base 
from beneath . . «ee 1 ee ew ee we we duge si. 
2. Size much smaller. Vulval area without processes, with simply a 
transverse chitinous rim having a small cavity at eachend. . . rotundus, O. P.-Cambr. 
1. Physocyclus globosus. (Tab. XXXIV. figg. 22, 22a, 6, 3; 23, 2.) 
Pholcus globosus, Tacz. Hor. Soc. Ent. Ross. x. p. 105 (1873) '; Banks, Proc. Calif. Acad. Sci. (3) 
i. p. 218°. 
Physocyclus globosus, E. Simon, P. Z. 8. 1894, p. 519°. 
