146 NEUROPTERA. 
Subfam. GOMPHINA. 
Synopsis of the Genera of the present Faunal District *. 
A. Internal triangle of the front wings (except in P. (?) paucinervis from 
Bogota) and the discoidal triangles of both wings (except in P. (?) pauci- 
nervis and the Brazilian P. gracilis) cross-veined ; a proximal brace- 
vein to the pterostigma, arculus at or proximal to the second antenodal, 
one submedian cross-vein (other than those forming parts of the 
internal triangle), one to two rows of cells between the principal 
sector and next supplementary sector below at the level of the distal 
end of the pterostigma, two rows of cells between principal and 
nodal sectors beginning more remote than halfway from the nodus to 
the pterostigma, basal subcostal cross-veins usually present (except 
in P. gracilis); front wings (except in P. pygmaeus, P. gracilis, 
P. (?) paucinervis, and Gomphoides volsella) with two rows of postcostal 
cells beginning proximal to the level of the discoidal triangle, and 
three or more rows of cells between the second sector of the triangle 
and the hind margin. Legs short, third femora hardly reaching to the 
apex of the first abdominal segment. Males with a (usually pale- 
coloured) inferior carina on the distal part of the first tibize. 
B. Sectors of the arculus distinctly separated at their origin by an 
interval greater than the thickness of either sector; no supra- 
triangular cross-veins, thickened distal antenodal the fifth ; inferior 
angle of the triangle formed by the three ocelli (head being viewed 
from in front) 100°-120°. Males with the anal triangle not reaching 
backward to the anal angle, 38-celled. . . . . . . . «+ . . Procompnvs. 
BB. Sectors of the arculus in contact with each other (or separated by an 
interval less than the thickness of either sector) at their origin, one 
or more supra-triangular cross-veins, thickened distal antenodal the 
sixth or more remote; inferior angle of ocellar triangle (seen from 
in front) 185°. Males with the anal triangle reaching backward to 
the anal angle, 4-6-celled . 2. 2. 2. 2. 1. 1 ee ee) )06GOMPHOIDES. 
AA. Internal and discoidal triangles of both wings free; no supra-triangular 
cross-veins, no anal loop; third femora reaching but little farther back 
than the first abdominal segment, armed with spines shorter than the 
thickness of the femora themselves. 
C. Sectors of the arculus distinctly separated at their origin by an 
interval greater than the thickness of either sector, basal subcostal 
cross-veins absent: front wings with the short sector and the first 
sector of the triangle nearly parallel throughout, with six to eight 
marginal cells; proximal angle of discoidal triangle not as far distal 
* The characters of each genus in this and similar subsequent tables are arranged approximately in an 
order from less to greater variability, statistics for which I hope to publish elsewhere. 
