^ , CLASS V, ISSrCTA. 261 



Inhabits France, Germany, and England, in trees and hedges by the 

 sides of running brooks. 



Fam. V. SiALiDiE. Leach. 



Megaloptera. 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. Lair., Leach. Hemerobius. Geoff., De 

 Geer, Oliv. Semblis. Fahr. 

 Wings deflexed : tai-si with the last joint but one bifid : ocelli none. 

 Sp. 1. Si. niger. 

 Inhabits trees ; tlie larva in water. 



Fam. VI. Raphidiadx. I^ach. 



Rhaphidin.t. Latreille. 



It7«gs of equal size: thorax with the first segment large: tarsi witii 



four distinct joints, the last but onebilobate: antenna: nearly seta 



ceous : ocelli three, arranged in a triangle. 



Genus 397. RAPHIDIA. Lirin., Geoff., De Geer, Fabr., Oliv., 



Lam., Latr., Leach. 

 Head oval, narrowed behind, inflexed : thorax with the first segment 

 very long, narrow, and somewhat cylindric : anus of the female with 

 two united setje. 

 Sp. 1. Raph. ophiopsis. (PL 7. fg. 6.) 

 Inhabits trees and bushes near rivulets. 



Fam. \T:I. Psocid.e. Leach. 



PsoQuiLt,!;. Latreille, 



Liferior zcings smaller than the superior ones: some are apterous: 

 palpi two, composed of four joints. 



Stirps 1. — Tarsi t\vo-jointed. 



Genus 398. PSOCUS. Latr., Leach. 

 Wings four. 



Sp. 1. Pso. bipunctutus. Latr. 

 Inhabits woods. 



Stirps 2. — Tai-si three-jointed. 



Genus 399. xiTROPOS. Leach. Termes. Linn., De Geer. Pso- 

 cus. Fair., Latr. Pediculus. Geoff'. 

 Wings none. 

 Sp. 1. Atr. lignaria. 



Termes pulsatorium. Linn. Atropos lignaria. Leach. 

 Inhabits old books, and the paper on walls, often beating like a watch. 



