190 ARANEIDEA. 
There are no females of either C. unicolor or C. extensus in our collection ; 
C. mandibularis is unknown to me. 
1. Cobanus unicolor, sp.n. (Tab. XIV. figg. 3, 34, ¢ .) 
Type, d, in coll. Godman & Salvin. Total length 7 millim. 
Hab. Costa Rica (Sarg); Panama, Bugaba (Champion). 
This species can be recognized by the absence of any tooth on the fang of the 
mandible, by the closer proximity of the two upper teeth of the mandible, and by the 
absence of dark annulations on the legs. This latter character may not, however, 
prove constant. The tibia of the palpus is shorter in proportion than in C. extensus. 
2. Cobanus mandibularis. (Tab. XIII. figg. 19, 194¢, 2.) 
Helorus mandibularis, Peckh. Occas. Papers Nat. Hist. Soc. Wisc. iii. 1, p. 29, t. 2. figg. 1, la-c (3) 
(April 1896) '. 
Type, d, in coll. Peckham. Total length 9 millim. 
Hab. Panama}. 
No examples of this occur in our collection. It is a very large species, and may, 
according to Peckham, be identified by the tooth on the inner side of the fang near 
its base. Our figures are copied from those given by him. 
3. Cobanus extensus. (Tab. XIII. fige. 20, 20a-g, g; 21, 21a, 2.) 
go. 2 
Helorus extensus, Peckh. Occas. Papers Nat. Hist. Soc. Wisc. iii. 1, p. 80, t. 2. figg. 2, 2a, 6 (3) 
(April 1896) °. 
Type, d, in coll. Peckham. Total length 6-8-4 millim. 
Hab. Panama!, Bugaba (Champion). 
I can find no females in our collection which can be assigned to this species: there 
are none large enough. The male may be recognized by the absence of any inner basal 
tooth on the fang, and also by the wide separation of the two teeth on the lower 
margin of the fang-groove. The mandibles vary considerably in Iength in different 
examples. In fig. 2 of Peckham’s work}, tibia i. is represented as with three spines 
only in the apical half: this must be incorrect, and suggests the genus Dendryphantes 
(sec. Peckham). 
4, Cobanus flavens. (Tab. XIV. figg. 1, la-d, 3; 2, 2af, 2.) 
Helorus flavens, Peckh. Occas. Papers Nat. Hist. Soc. Wisc. iii. 1, p. 31, t. 2. figg. 3, 3a-c (d) 
(April 1896) °. 
Type, ¢, in coll. Peckham; deuterotype, 2, in coll. Godman & Salvin. Total length, ¢ 5°5, 2 6°5 millim. 
Hab. Panama}. | 
The female is here figured and described (see Table) for the first time. ‘The colour 
is yellow, the abdomen having four black spots in the apical half. It is not possible 
