HABRONATTUS.—HOMALATTUS. 303 
HABRONATTUS (ante, p. 241). 
Habronattus simplex. 
Pellenes simplex, Peckh. Bull. Wisc. Nat. Hist. Soc. (4) i. p. 220, t. 1. fig. 12 (2) (June 1901)’. 
Type, 2, in coll. Peckham. Total length 5:5 millim. 
Hab. Mexico, Vera Cruz}. 
Habronattus placidus. 
Pellenes placidus, Peckh. loc. cit. p. 223, t. 1. fig. 18 (?)’. 
Type, 2, in coll. Peckham. Total length 7 millim. 
flab. Mexico, Chihuahua !. 
HOMALATTUS. 
Homalattus, White, Ann. & Mag. Nat. Hist. vil. p. 476 (1841). 
Type H. pustulatus, White. Sierra Leone. 
Homalattus hispidus. 
Homalattus hispidus, Peckh. Bull. Wise. Nat. Hist. Soc. (4) i. p. 229, t. 2. figg. 5, 5a (2) 
(June 1901) *. 
Type, 2, in coll. Peckham. Total length 7 millim. 
Hab. Mexico, San Rafael (Townsend 1). 
Fam, PISAURIDA. 
The spiders belonging to this family are so closely allied to the Agelenide and the 
Lycoside that it is difficult to point out any really reliable distinguishing character. 
The Lycoside, however, have no tibial spur on the male palpus, while this is always 
present to a greater or less extent in the species of the other two families. The 
species here included under the name Pisauride may be subdivided into various 
genera; but it is possible that Cupiennius would be better placed in the Clubionide 
under the subfamily Ctenine. This, however, cannot be done if the possession of three 
tarsal claws be regarded of greater importance than that of claw-tufts. Simon holds 
that this “ soi-disant griffe,” the third claw, whose existence I have already pointed 
out [Ann. & Mag. Nat. Hist. (6) xx. p. 329], is merely a development of the base of 
the rhomboidal sclerite (plantula) present in Ctenus, and that it has no analogy 
with the third independent claw (“ griffe impaire indépendante”) of the Agelenide, 
Pisauride, and Lycoside. 
An extended and minute examination of the tarsal claws of numbers of examples 
belonging to these and other families has convinced me that both the sclerite and the 
hook-like development are homologous structures. The third claw is in every case 
simply a hook-like development at the base of this sclerite, which has become atrophied 
