1947] 
Banks — Characters in the Perlidee 
281 
head; fourth antennal joint fully as long* as broad. 
Megahelus 
Hind ocelli not so far from hind border of head and 
looking out over a broad shallow groove toward eye 
or antennae; anterior ocellus much farther from 
either eye than from anterior border of head 4 
4. Ocellar area about twice as broad as long; median 
groove complete and distinct ; wings moderately 
broad Pictet la 
Ocellar area plainly not twice as broad as long ; 
median groove sometimes complete, often not, 
wings not so broad Clioperla 
Clioperla N. & C. 
This genus, proposed by Needham and Claassen, is 
based on the I so genus clio Newman. Through the kind- 
ness of Mr. Kimmins of the British Museum I have 
learned of the generic characters which places the genus 
in the above table. The type is from Georgia, N. & C. 
identified specimens from North Carolina and Indiana. 
I have not been able to see these specimens ; Prison saw 
them and said 3 that the specimens from Raleigh, N. C., 
are the same as his confusa. Specimens sent, as para- 
types of confusa , by Prison to the M.C.Z. are very differ- 
ent from clio. In the M.C.Z. are two specimens from 
Woodworth Lake, Pulton Co., N. Y., which agree with 
color description I made of the type in 1912. The species 
is very close, perhaps the same, as that later described 
by Pictet as Perla maculata. Specimens that I have iden- 
tified as maculata are from North Carolina and the White 
Mts., N. H. ; these are smaller than clio and the tip of 
abdomen yellow, and the subgenital plate less strongly 
rounded. 
Pictetia gen. nov. 
Type : Perla expansa Bks. 
The anal lobe is very small and short, the brace scarcely 
distinct; cubito-anal vein beyond tip of anal cell; palpi 
long and slender ; back of eyes the head slopes inward. 
3 Bull. 111. Nat. Hist. Survey 22 : 331. 1942. 
