PHYSOCYCLUS. 369 
Pholcus gibbosus, Keyserling, Verh. zool.-bot. Ges. Wien, xxvii. p. 208, t. 7. figg. 2, 2a (?) (1877) °. 
Decetia incisa, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 234, t. 29. figg. 1, l a-e (2) *. 
Type, 2, of P. globosus in Mus. Warsaw; of P. gibbosus in Mus. Brit.; of D. incisa in coll. Godman & Salvin. 
Total length, 9, 4°5 millim. 
Hab. Norra America, Lower California? +.— Mexico, Teapa (H. H. Smith+).— 
CoLomsiA, Bogota?; Guiana, Cayenne}. 
The female of this species bears on the anterior part of the abdomen a small, oval, 
roughened, chitinous plate, which is adapted to work against the conical cusp on the 
carapace, evidently constituting a stridulating-organ. ‘The anterior process of the vulva 
is directed forward, but sharply recurved, pointed in profile, bifid from beneath. The 
mandibles are striated on the outer side in both sexes. 
2. Physocyclus dugesi. (Tab. XXXV. figg. 1, la-d, 3; 2, 2a, b, 2.) 
Physocyclus dugesi, E. Simon, Ann. Soc. Ent. Fr. 1893, p. 320°. 
Type ¢, gynetype 2, in coll. E. Simon. Total length, ¢ 5, 2 6°5 millim. 
Hab. Mexico, Guanajuato (Dugés!), Amula (H. H. Smith); Guatemata (Sarg); Costa 
Rica (Sarg). 
The anterior process of the vulva is directed backward, straight, and bluntly pointed, 
deeply bifid to the base, when seen from beneath. ‘The mandibles are striated on the 
outer side in both sexes. 
3. Physocyclus rotundus. (Tab. XXXV. figg. 3,34, }, 2.) 
Physocyclus rotundus, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran, i. p. 263, t. 39. figg. 3, 
3a-c (?)’. 
Type, 2, in coll. Godman & Salvin. Total length 3°5 millim. 
Hab. Guatemata, Coban (Sarg 1). 
The vulval area is very inconspicuous, limited by three parallel chitinous lines, the 
anterior one shorter and slightly procurved, the posterior longer and recurved, the 
central one sinuous, with a small oval cavity at each end. ‘The absence of any 
stridulating-bars on the mandible will probably furnish a good generic character. 
Unfortunately, however, there are no males of this species in our collection. 
4, Physocyclus mexicanus. 
Physocyclus mexicanus, Banks, Proc. Calif. Acad. Sci. (8) i. p. 218, t. 18. fig. 40 (9) °. 
Type, 2, im coll. Calif. Acad. Sci. Total length 4 millim. 
Hab. Mexico, Tepic?. 
This species, which is allied to P. dugesi, can be recognized by the very long anterior 
BIOL. CENTR.-AMER., Arachn. Aran., Vol. II., May 1902. 3 BL 
