PLECOPTERA NYMPHS OF NORTH AMERICA 63 
General color yellowish brown; very hairy. Head yellowish with 
the median area darker; surface smooth and feebly pilose. 
Pronotum transversely suboval and covered with long brown 
hair, the margin having a fringe of long hairs. Meso- and meta- 
notum and abdomen covered with long hairs. 
Legs hairy and the tibiae with a feeble fringe of long hairs. 
Described from mature nymphs collected in San Antonio 
Canyon, Claremont, California, on April 29 and May 12, 1923. 
J. G. Needham. 
Genus CHLOROPERLA Newman 
This genus is represented in North America by a single species, 
C. cydippe Newm. The nymphs are small, yellowish, and, when 
fully grown, measure not more than 6 mm. in body length. 
Chloroperla is very closely allied to Alloperla and identification 
of the nymphs is largely dependent on reared specimens. 
Head a little wider than pronotum; eyes large; three ocelli; 
pronotum transversely oval, and much narrower than the meso- 
and metanotum with the broad, rounded wing pads. 
Entire body quite uniformly yellowish or yellowish brown, and 
sparsely clothed with hairs. The description of C. cydippe depicts 
the more detailed structures of this genus. 
No study has been made of the biology of this genus, but it 
seems safe to state that the nymphs are found in rather swift- 
running water and that they are mainly carnivorous. 
Chloroperla cydippe Newman 
(Plate 6, figs. 94-99; plate 18, fig. 194.) 
Length of body up to 6 mm.; antennae up to 2 mm. 
General color yellowish brown, without a contrasting color pat- 
uevug 
Head a little wider than pronotum; eyes large, and set 
considerably forward; postero-lateral angles of head broadly 
rounded; antennae with about thirty-five segments; three small 
ocelli. 
Pronotum transversely oval, wider than long; all angles very 
broadly rounded; front and hind margins straight; marginal 
groove continuous all around; surface quite smooth; long hairs 
at the anterior and posterior angles. Wing pads broadly rounded 
at the tip. Legs somewhat flattened ; rather sparsely clothed with 
hairs, and only the tibiae with a fringe of long hairs on the outer 
margin. Segments one and two of tarsus very short, subequal, and 
together hardly one-fourth as long as the third segment. 
