SIDUSA. 219 
31. Sidusa flavida, sp.n. (Tab. XVIII. figg. 1,la, ¢; 2, 2.) 
Type ¢, gynetype 2, in coll. Godman & Salvin. Total length, ¢ 5, 9 6 millim. 
Hab. Guatemata (Sarg). 
This little species can be recognized by the conspicuous band of yellow hairs on the 
anterior margin of the abdomen in both sexes. Other characters are given in the 
Table of species. Jotus opimus, Peckh., is closely allied to this species and also to 
S. sulphurea. 
32. Sidusa binotata, sp.n. (Tab. XVIII. fig. 3, ¢.) 
Type, d, in coll. Godman & Salvin. Total length 8 millim. 
Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith). 
In size and general appearance this spider is very like S. conspecta (Peckh.), but 
the tibial spur is longer and more slender, and there are no brown and white crested 
fringes above and beneath patelle, tibiz, and protarsi i. and ii., but only a more dense 
clothing of black hairs; tibie i. and ii. are, moreover, cylindrical and not quadrate, 
seen in transverse section, as in S. conspecta. Otherwise the coloration is very similar 
indeed. The distinctive characters are given in the Table. 
33. Sidusa excavata, sp.n. (Tab. XVIII. figg. 4, 4a, 2, &.) 
Type, d, in’coll. Godman & Salvin. Total length 8 millim. 
Legs unicolorous brown. Carapace and legs clothed with azure-blue scales, the former also with a spot of 
white scales between and beneath the lateral eyes, and another on each side behind the posterior lateral 
eyes, but approaching the central line. Apex of femur and tibia of palpus yellow, clothed with white 
scales. Clypeus not clothed with white hairs. 
Hab. Guatema.a (Sarg). 
This species may be recognized by the excavate mandibles (the excavation not 
confined to the middle) and the absence of a tooth on their margin, the absence of 
fringing hairs on the legs, the abrupt constriction on the inner basal margin of the 
palpal bulb, and the less sweeping curve of the apical spine. 
34, Sidusa opima. (Tab. XVIII. figg. 5, ¢; 6, 2.) 
Jotus opimus, Peckh. Proc. Nat. Hist. Soc. Wisc. 1885, p. 71, t. 2. figg. 7, 7 b(?),7a(¢) (Dec.)*. 
Dynamius opimus, Peckh. Occas. Papers Nat. Hist. Soc. Wise. iii. 1, p. 12 (¢) (April 1896) * ; 
Banks, Proc. Calif. Acad. Sci. (8) i. p. 288, t. 17. fig. 25 (2) (1898) °*. 
Type d, gynetype 2, in coll. Peckham. Total length, ¢ 8, 9 10°7 millim. 
Hab. Mexico, Tepic?; Guaremaua!?. 
This species is evidently closely allied to others of the “‘ Escambia” group of Sidusa. 
probably the same as S. fulvoguttata. 
2 Fp 2 
