CESONIA.—PROSTHESIMA. 57 
Fourteen or fifteen examples of the female sex of this handsome species were taken 
by Mr. Smith, but no males. 
‘The locality was not appended to the original description of the species !. 
9. Cesonia fugax. 
Cesonia fugaz, O. P.-Cambr. Biol. Centr.-Amer., Arachn. Aran. i. p. 281, t. 82. figg. 5, 5a-c (2)’. 
Type, 2, in coll. Godman & Salvin. 
Hab. Mexico, Amula (H. H. Smith ?). 
3. Cesonia mexicana. 
Cesunia mexicana, Banks, Proc. Calif. Acad. Sci. (3) i. p. 221, t. 13. fig. 24 (1898) '. 
3. Length 6 millim.; 9, 7 millim. 
Hab. Mexico, Tepic, Orizaba (Banks '*). 
This species is very likely identical with C. lugubris, O. P.-Cambr. ; and if so, the 
latter name has priority. 
PROSTHESIMA. 
Melanophora, C. Koch, in Panzer’s Deutschl. Insecten, tabb. 20, 21 (Dec. 1833) (nomen preoce.)*- 
Prosthesima, L. Koch, Abhandl. Ges. Niirnb. vi. p. 189 (1872). 
Type P. subterranea (C. Koch). 
The two species of this genus known to me may be distinguished as follows :— 
A. Carapace and legs orange-yellow ; abdomen ochreous-yellow . . lutea, sp. n. 
B. Carapace, legs, and abdomen deep brown or sooty-black . . . . mesta, QO. P.-Cambr. 
1. Prosthesima lutea, sp. n. (Tab. IV. figg. 16, 16a, 2.) 
Type, 2, in coll. Godman & Salvin. Total length 7-5 millim. 
Q. Carapace, sternum, and legs pale orange-yellow. Abdomen dull yellow-ochre, clothed with fine dark hairs. 
For the figure of the vulva, see Tab. IV. fig. 16a. 
Hab. Guatemata (Sarg). 
A single adult female only has been received. 
2. Prosthesima mesta. (Tab. LV. figg. 15, 15a, ¢; 154, 2.) 
Prosthesima mesta,O.P.-Cambr. Biol. Centr.-Amer., Arachn. Aran.i, p. 245, t. 33. figg.2,2a-~(d)’. 
Type d, cotype 2, in coll. Godman & Salvin. 
Hab. Mexico, Amula in Guerrero (H. H. Smith '). 
* The name Melanophora given by C. Koch to this group in 1833 had already been used by Meigen for a 
genus of Diptera [‘ Magazin fiir Insektenkunde,’ von Karl Illiger. Braunschweig, ii. p. 279 (1803)}]. 
BIOL. CENTR.-AMER., Arachn. Aran., Vol. II., September 1899. It 
