278 
Psyche 
[Dec. 
11. Femora with bristles below among the shorter hairs ; 
anal lobe very small Calliperlinae 
Femora with only the fringe of short hairs below. 
Isogeninae 
Review of Subfamilies and Geneba 
Subfamily Perlodinae 
Hanson lias arranged the species of this subfamily on 
sternal structure, and, I believe, is continuing his work, 
so I have not utilized sternal structure in this paper, 
although I have previously (1938) based a genus, Hes- 
peroperla, on such characters, and in fact have called 
attention to the value of ventral structure many years 
ago (1900). 
The only point I would make is that I think his Dicty- 
operygella w ashing toniana belongs to the Isogeninae, close 
to or the same as Hydroperla ; and add a new genus, dif- 
fering from Perlodes in the presence of bristles on the 
femora. 
Perliphanes gen. nov. 
Type: Piety o genus (?) phaleratus Smith. 
Head plainly broader than long ; ocellar triangle a little 
broader than long, hind ocelli rather small, looking later- 
ally, nearer to each other than to eyes; median groove 
reaching occipital line; palpi rather short, third joint 
thick, longer than fourth, last joint one-half of fourth; 
pronotum twice as broad as long, sides parallel, as also 
front and rear sides; setae short, several joints beyond 
first broader than long. Wings with some cross-veins 
connecting branches of radial sector, thus forming cells 
much like Perlodes. Upper branch of cubitus bends at 
the forking; cubito-anal vein at end of anal cell, first 
anal vein not here angled; anal lobe does not reach lower 
end of anal cell ; a transverse brace across anal area from 
near base of anal cell. The femora have bristles among 
the shorter hairs. 
Subfamily Calliperlinae 
Cubito-anal vein at or near end of anal cell; the first 
