136 ARANEIDEA, 
and Diea, will some day be merged under the genus Thomisus, while the others, such 
as Synema, Orxyptila, &c., will run together under Xysticus. 
The genera Pistius, Misumena, Oxyptila, and Dica are not, so far as the material at 
hand is concerned, represented in Central America. 
THOMISUS. 
Thomisus, Walckenaer, Tabl. Aran. p. 28 (1805). 
Type 7. albus (Gmelin). Africa. 
Anterior row of eyes strongly recurved (less so in 7’. albus and 7’. onustus) ; eyes not equidistant, centrals 
much closer, equal in size. Posterior row very slightly recurved; eyes not equidistant, centrals much 
further apart, equal in size, slightly smaller than those of anterior row. Central quadrangle much broader 
than long, much narrower in front. Clypeus vertical, very high, equal to at least four diameters of an 
anterior central eye. Ocular area produced into a stout conical tubercle between the lateral eyes. 
Protarsi i. with six pairs, ii. with four pairs of spines beneath. Tibi i. and ii. with one or two pairs 
of spines towards their apex beneath. (These spines vary in number.) 
The above diagnosis is drawn from an adult female of 7. albus. 
1. Thomisus odiosus. 
Thomisus odiosus, O. P.-Cambr. Biol. Ceutr.-Amer., Arachn. Aran. 1. p. 271, t. 34. figg. 5, 5a-d({¢)*. 
Type, ¢, total length 2-25 millim.* 
Hab. Mexico, Teapa in Tabasco (H. H. Smith '). 
[PISTIUS. 
Fistius, E. Simon, Araign. Fr. ii. p. 257 (1875). 
Type P. truncatus (Pallas), Europe. 
Anterior row of eyes strongly recurved; eyes almost equidistant, laterals distinctly larger. Posterior row 
straight ; centrals closer to each other than to the laterals, equal in size. Central quadrangle longer than 
broad, not narrower in front. Clypeus vertical, very high, equal to over four diameters of an anterior 
central eye. Ocular area only slightly produced into a low rounded cone between the lateral eyes. Legs 
more spinose than in Thomisus. 
The characters of this genus have been given for the sake of comparison. 
[Tab. IX. figg. 24, 24a(9)].J 
MISUMENOIDES, gen. nov. 
Type M. magnus (Keys.) = signatus (O. P.-Cambr.). Central America. 
Anterior row of eyes slightly recurved, posterior margins of centrals cutting a line tangential with anterior 
margins of laterals ; eyes not equidistant, centrals distinctly further apart, laterals distinctly larger than 
centrals. Posterior row very slightly recurved, almost straight ; eyes not equidistant, centrals distinctly 
further apart; eyes equal in size. Central quadrangle much broader than long, distinctly narrower in 
front; eyes subequal. 
Clypeus vertical, equal to one and a half diameters of an anterior central eye. Ocular area produced into a 
blunt conical tubercle between the lateral eyes; distinctly ridged through the centre. 
These generic characters are drawn from the adult female. 
* The type of this species cannot now be found in the Godman and Salvin collection. 
