CLASS V. IXSECTA. 
261 
Inhabits France, Germany, and England, in trees and hedges by the 
sides of running brooks. 
Fam. V. Sialid.e. Leach. 
Hegaloptera. Latreille. 
Thorax with the first segment large, not much longer than broad : tarsi 
five-jointed : wings of equal size : feet resembling each other. 
Genus 396. SIALIS. Latr., Leach. Hemerobius. Geoff., De 
Geer, Oliv. Semblis. Fair. 
Wings deflexed: tarsi with the last joint but one bifid : ocelli none. 
Sp. 1 . Si. niger. 
Inhabits trees; the larva in water. 
Fam. VI. Raphidiadx. Leach. 
Hhaphidinje. Latreille. 
IFi'ngs of equal size : thorax with the first segment large : tarsi with 
four distinct joints, the last but onebilobate: antenna: nearly seta- 
ceous : ocelli three, arranged in a triangle. 
Genus 397. RAPHIDIA. Linn., Geoff., De Geer, Fair., Oliv., 
Lam., Latr., Leach. 
Head oval, narrowed behind, indexed : thorax with the first segment 
very long, narrow, and somewhat cylindric: amis of the female with 
two united set®. 
Sp. 1. Raph. ophiopsis. (PI. 7. fig. 6.) 
Inhabits trees and bushes near rivulets. 
Fam. VII. Psocidje. Leach. 
Psoquillje. Latreille. 
Inferior wings smaller than the superior ones: some are apterous: 
palpi two, composed of four joints. 
Stirps 1. — Tarsi two-jointed. 
Genus 398. PSOCUS. Latr., LeacA. 
Wings four. 
Sp. 1. Pso. bipunctatus. Latr. 
Inhabits woods. 
S fiRPS 2 . — Tarsi three-jointed. 
Genus 399. ATROPOS. Leach. Termes. Linn., De Geer. Pso- 
CUS. Fabr., Latr. Pediculus. Geoff. 
Wings none. 
SP* L Atr. lignaria. 
lermes pulsatorium. Linn. Atropos lignaria. Lxach. 
Inhabits old books, and the paper on walls, often beating like a w r atch. 
