534 ARANEIDEA. 
Hab. Mexico (Mus. Brit.), Omilteme, Teapa (H. H. Smith); Guaremata (Mus. Brit.), 
Retalhuleu, Volcan de Fuego, Coban, Menché, Ayutla, Cubilguitz, Tactic, Sakiyac, 
Chiacam, Tamahu (Sarg); Panama, Bugaba (Champion).—Braziu 1°, 
14, Micrathena triserrata, sp.n. (Tab. L. figg. 17, 17 a-c, 2.) 
Type, 2, in coll. Godman & Salvin. Total length 10 millim. 
General characters similar to those of IM. 12-spinosa, the thoracic area of the carapace being very gibbous. 
Abdomen dorsally quite flattened, entirely, but not very closely, punctured, armed on the anterior margin 
with two short sharp spines directed straight forwards and slightly upwards; with three lateral marginal, 
short, conical cusps on each side, the first more remote from the two posterior ones, which are adjacent ; 
bifurcating posteriorly into two broad, compressed, short, trifid spurs, each branch being very short, 
compressed, conical, subequal, having a sharp apex. 
The vulval scapus has a transverse cavity in front, and is otherwise generally similar in character to that of 
the allied forms, see Plate. 
Colour: abdomen brown, with a central oval yellow spot and lateral marginal yellow band. 
Hab. GuateMata (Sarg). 
15. Micrathena quadriserrata, sp.n. (Tab. L. figg. 18, 18 a, b, 2.) 
Type, 2, in coll. Godman & Salvin. Total length 9 millim. 
General characters similar to those of I. triserrata, the thoracic area of the carapace being strongly gibbous. 
The abdomen is finely, but not very closely, punctured throughout, having a pair of sharp anterior 
marginal spines, directed straight forwards and slightly upwards, and two median lateral marginal sharp 
cusps, their apices directed backwards; posteriorly it is compressed and divided into a broad, flattened, 
quadrifid spur, the two central branches being the largest, these spurs, however, varying much in 
character in different individuals and according to the condition of the spider. 
The form of the vulval scapus is generally similar to that of other allied forms, though differing in special 
characters, see Plate. 
Colour: carapace and legs dull olive-brown or bluish olive-green, the former with a broad marginal dark 
brown band. Abdomen sooty-black, with a broad, oblong, central, dorsal pale area, and a lateral 
marginal pale band. 
ITab. GUATEMALA, Quezaltepeque (Sarg). 
The particulars as to colour are taken from Mr. Sarg’s notes. 
16. Micrathena serrata, sp.n. (Tab. L. figg. 19, 19 a-e, .) 
Type, 2, in coll. Godman & Salvin. Total length 8 millim. 
General characters as in M. inaequalis, except that the thoracic area of the carapace is much higher than the 
cephalic, being very gibbous and similar to that of M.12-spinosa. Abdomen also very similar to that 
of M. inequalis, but besides having two anterior marginal sharp spines, there are four lateral marginal 
minute cusps in the posterior two-thirds (instead of one only); the posterior spur on each side is deeply 
bifid, each branch being equal in length and thickness, having also at their base behind another minute 
cusp. 
The vulva is also very like that of WM. inequalis, but differs in detuil, see Plate. 
Colour: abdomen with the entire dorsal area yellow and the muscle-scars black; lateral and posterior areas 
more or less mottled irregularly with yellow spots, the lateral area sometimes with two very definite 
broken lines running down to the spinners, 
Hab. Panama, Volcan de Chiriqui (Champion). 
