276 
Psyche 
[Dec. 
short; setae very short, but basal joints distinct; 
costal cross-veins numerous Peltoperlinae 
Head usually longer; pronotum usually a little con- 
vex in front; setae not especially short 5 
5. Ocelli hardly three diameters apart; anal brace dis- 
tinct, extending obliquely back; femora with 
bristles among the hairs, no cross-veins between 
first and second anal veins Neoperlinae 
Ocelli fully four diameters apart; anal brace faint 
or absent, usually a few cross-veins between first 
and second anal veins Atoperla in Perlestinae 
6. In fore-wings there is an obliquely recurrent anal 
brace, often arising near base of third anal vein. 
Third antennal joint not or little longer than the 
fourth joint; cubito-anal cross-vein usually at or 
before end of anal cell; lower edge of femora with 
fine hairs and some longer bristles 7 
In fore wings the anal brace, if present, arises from 
nearer the base of the anal cell, and extends trans- 
versely across anal area and anal lobe (if present) ; 
often anal brace faint or absent. Third antennal 
joint much longer than broad, and sometimes nar- 
rowed in middle; cubito-anal cross-vein frequently 
beyond end of anal cell, and first anal vein may be 
bent at that point. The lower edge of femora has 
a row of fine, usually short hairs, but sometimes 
with longer bristles present 9 
7. Setae fairly long, not noticeably thick near base, the 
joints soon as long as broad, the fourth not several 
times as broad as long, often with long erect 
bristles at tip of joints; wings with few, if any, 
cross-veins beyond the cord; sometimes a few 
cross-veins in anal area ; in male the genitalia are 
not visible from above Perlestinae 
Setae fairly short, thickened at base, the first few 
joints usually three or four times as broad as 
long, and not notched at base; usually a number 
of joints of antennae toward base much broader 
than long 8 
8. Radial sector beyond cord usually forks three times, 
