EUPLECTINI 109 



their inclusion is doubtful, the genotype from Colombia and a new species 

 from the Panama Canal Zone. 



These four species may be separated as follows: 



Head not wider than pronotum ; clypeal margin "strongly raised and 

 connected on either side by a small process to the anterior acuminate 

 part of the convex vertex, so that the depressed space is (distinctly) 

 divided into a lateral portion on each side and a median portion 



placed more anteriorly" [ex Sharp) femoralis Sharp 



(1.25 mm.; male?; El Tumbador, Guatemala) 



Head wider than pronotum; clypeal margin not so connected each 

 side with the vaulted vertex (PI. XIX, 7) 2 



2. Vaulted median portion of the vertex extending anteriorly as a tri- 



angular angle into the post-clypeal depression 3 



Vaulted median portion of the vertex transversely divided into a basal 

 triangular portion which is separated by a transverse sulcus from an 

 anterior acute tubercle (PI. XIX, 7) furcalis new species 



3. Known from Guatemala; 1.4 mm. long; rufocastaneus 



clavicornis Sharp 



Known from Colombia; 1.3-1.4 mm. long; testaceus 



claviceps Reitter 



Trimiopsis has a characteristic habitus, which includes the broad head, 

 strongly vaulted vertex, and the distinctly asymmetrically triangular tenth 

 antennal segment. The following species is new: 



Trimiopsis furcalis new species 



Holotype Male. Measurements: Head 0.20 x 0.24 mm.; pronotum 0.21 x 

 0.20 mm.; elytra 0.28 x 0.32 mm.; abdomen 0.40 x 0.30 mm.; total length 1.1 

 mm.; greatest width 0.32 mm. (PI. XIX, 7). 



Reddish-brown, with the head and pronotum slightly darker; integument 

 moderately shining, pubescence short and inconspicuous. 



Head with the tempora parallel, as long as eye; eyes prominent; temporal 

 angles prominent and squarely rounded; vertex with sides above each eye 

 flattened and granulated, medianly the vertex is conspicuously vaulted and 

 not granulated; vertexal foveae minute and punctiform (in contrast to the 

 large vertexal foveae of the genotype), situated on a line passing through 

 middle of eyes. Vertexal sulci complex: from each vertexal fovea there extends 

 a short longitudinal sulcus, which bifurcates near a point opposite the anterior 

 margin of the eye, into two arcuate sulci; these arcuate sulci are medianly 

 confluent with their homologous sulci from the other side, so that there are two 

 arcuate transverse sulci. This sulcation of the head divides the vaulted median 

 part of the vertex into a larger, posterior, subtriangular portion which begins 

 between the vertexal foveae and is limited anteriorly by the median transverse 

 sulcus, and a smaller, acute subpyramidal tubercle which lies between the two 



