CLASS V. IKSECTA. 259" 



Sp. 1. Amir Imperator. 



Inhabits England in the New Forest of Hampshire. It is necessary to 

 inform the young entomologist, that the insects of the first and se- 

 cond stirpes of this family require, whilst in a recent state, that the 

 contents of the abdomen should be extracted, and filled with either 

 a piece of paper or cotton, rolled upas near as possible to the natu- 

 ral size of the body, as without this precaution the insects will lose 

 their colour and turn entirely black, l-'or further directions see In- 

 structions for Killing and Preserving. 



Stirps S. — Wings erect: head transverse: abdomen cylindric, linear: 



ocelli or little eyes placed in a triangle. 



Genus 386. AGIIION. Fair., Latr., Leach. Libellcla. Linn. 

 Wings membranaceous, with a rhomboidal stigma: abdomen of the 



male not armed with a forceps-like appendage. 

 Sp. 1. Agrion sangidnius. 

 Inhabits marshes. 



Genus 387. LESTES. Leach. 

 Wings membranaceous with an oblong-quadrate parallclopipcd stig- 

 ma : abdomen of the male armed with a forceps-like appendage, 

 Sp. 1 . Lestcs antumnalis. 

 Inhabits marshy places. 



Genus 388. CALEPTERYX. Uach. Acriok. Fahr., Lutr. 

 Wings coriaceo-membranaceous, without a real stigma, in place of 



which is sometimes an irregular transparent spot : abdomen of the 



male furnished with a forceps-like appendage. 

 Sp. 1. Cul. Virgo. 

 Inhabits the banks of rivers. 



Fam. II. Ephemerid.te. Leach, 

 Ephemerix.?:. Latreille. 



Tarsi four-jointed: mouth not distinct: inferior zcings much .smaller 

 than the others, sometimes wanting: abdomen Wk-\\h the extremity 

 furnished with filaments. j\Ietamorphosis quadruple. 



Stip.ps 1. — Tail with t^vo filaments. 



Genus 389. BAETIS. Leach. Ephemera. Linn., Fabr., Lnfr. 

 Wings four. 

 Sp. 1. Bdetis bioculata. 

 Inhabits near water. 



Genus 390. CLOEON. Leach. 

 Wings two. 

 Sp. 1. Clo. pallida. 

 Ephemera diptera. Linn., Fabr. 



Inhabits Norfolk and Cumberland, near larg*- pieces of water. 



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