76 INSECTA. 
of their tarsi, and inthe setz of the extremity of the abdomen, which 
are almost wanting(1). 
P. bicaudata; Phryganea bicaudata, L.; Geoff., Insect., II, 
xiii, 2. Eight lines in length; of an obscure brown with a yel- 
low line along the middle of the head and thorax; nervures of 
the wings brown; setz of the tail almost as long as the antennz. 
Common in Europe in the spring along the banks of rivers(2). 
FAMILY III. 
PLICIPENNES(8). 
In this family the mandibles are wanting, and the inferior 
wings are usually wider than the others and plaited longitu- 
dinally. It is formed of the genus 
PuryGaneEa, Lin. Fab. 
These Neuroptera, at a first glance, have the appearance of little 
Phalenz, and hence the name of Mouches papillonacées or papillo- 
naceous flies, bestowed upon them by Reaumur. De Geer even ob- 
serves that the internal organization of their larve bears the closest 
resemblance to that of caterpillars. Their head is small and pre- 
sents two setaceous antennz, usually very long and salient; rounded 
and salient eyes; two ocelli on the forehead; a curved or conical 
labrum; four palpi, those of the maxilla commonly very long, 
filiform, or almost setaceous and composed of five joints, and the 
(1) See Lat., Gen. Crust. et Insect., III, p. 210; Oliv., Encyc. Méthod., article 
Némoure; Phryganea nebulosa, L., &e. 
(2) Geoff. and Lat., Ibid. 
(3) In the systems of Messrs Kirby and Leach, this family forms the order of 
the Tricuorrera, which would connect itself with that of the Lepidoptera, through 
the Tinex. But as we naturally pass from the Plicipennes to the Perle, by follow- 
ing the series of mutual relations, we should be forced to terminate the Neurop- 
tera with the Libellule and Ephemerx, whose organization and habits differ 
greatly from those of the Hymenoptera, which according to this method follow 
the Neuroptera. The Libellule and other Neuroptera, which in our system come 
directly after, appear to us to be those which approximate most nearly to the 
Orthoptera. 
