1948] 
Banks — Perlidce 
117 
2. Neophasganophora and Harrisiola 
Failing to examine tlie genital prongs of the several 
species proposed in this genus N. & C. lumped all under 
Perla capitata Pictet, the type of the genus. I did not 
find the type specimen of the species in Europe in 1912, 
and Picker does not mention seeing it. Pictet says he had 
a male; if it were a Neopliasganophora he could hardly 
help seeing and referring to the genital prongs, so much 
larger than in other Perlidae. His specimen might well be 
a species much like, but paler than media. Media is 
largely black on the head ; this similar form, smaller and 
paler than media has a head largely yellowish with a 
black spot over the ocellar area and a median triangular 
black mark on the lower face, exactly as Pictet figures 
capitata. This form belongs to Perla (or Togoperla ) and 
the male has only small genital prongs and often in dried 
specimens are depressed in the cavity, so as scarcely no- 
ticeable. Therefore I replace Neopliasganophora of 
Needham with Harrisiola , and Perla flavescens Walsh as 
genotype. Harrisiola is readily separable, in the male 
from Perla or Togoperla by the elongate genital prongs, 
but both sexes are also separated by the course of the occi- 
pital line ; in Harrisiola the ends of the occipital line bend 
forward close to the outer edge of the lateral bosses ; in 
Perla ( Togoperla ) the line passes well above the lateral 
boss toward the eye. 
In the synoptic table of the species below I have used 
color, for I find that where we have a number of specimens 
and from various localities, the color of setae, of hind fe- 
mora, and the type of head marking is the same through- 
out, and that they follow the shape of the male genital 
prongs, and therefore when specimens, tho few, show dif- 
ferences in these points I treat them as distinct species. 
The figure of the genital prong given by Klapalek is not 
like that of the Loudonville specimens I sent him ; and the 
figures of Needham and Claassen (Plate 19, figures 1 and 
2) are not at all the common flavescens but probably of II . 
americana, and the female (fig. 3) also fits this species. 
1. Hind femora mostly pale, with a broad black band 
across near base ; several joints near base of setae 
