CLASS V. INSECTA. 259 



Sp. 1. Auux Impemfor. 



Inhabits England in the Now 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 up as 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. For further directions see In- 

 structions for Killing and Preserving. 



Stirps 3. — Wings erect: head transverse: abdomen cylindric, linear: 

 ocelli or little eyes placed in a triangle. 



Genus 386. AGRION. Fabr., Lnfr., Leach. Libei.'i.ula. Linn. 

 Wings membranaceous, with a rhomboidal stigma: abdoinen of the 



male not armed with a forceps-like appendage. 

 Sp. 1. Agrion Hunguineus. 

 Inhabits marshes. 



Genus 387. LESTES. Leach. 

 Wings memViranaceous with an oblong-quadrate parallelepiped stig- 

 ma : ubdointn of the male armed with a tbrceps-like appendage. 

 Sp. 1. Lcstes aiitumnulis. 

 Inhabits marshy places. 



Genus 388. CALEPTEKYX. Lead,. Acrion. Fabr., Latr. 

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



which is sometimes an irregular transparent spot : abdomen oi \hc 



male furnished with a forceps-like appendage. 

 Sp. 1 . Cal. Virgo. 

 Inhabits the banks of rivers. 



Fam. II. Ephemekid.^. Leach. 

 Ephemerin.e. Lalrcille. 



Tarsi four-jointed: vwufh not distinct: inferior .icings much smaller 

 than the others, sometimes wanting : abdomen, with the extremity 

 furnished with filaments. JMeUunorphosis quadruple. 



Stirps 1. — Tail with two filaments. 



Genus 389. BxVETIS. Leach. Ephemera. Linn., Fabr., Lafr. 

 Wings four. 

 Sp. 1. Baetis bioculala. 

 Inhabits near water. 



Genus 390 CLOEON. Leach. 

 Wings two. 

 Sp. 1. Clo. pallida. 

 Ephemera diptera. Linn., Fabr. 



Inhabits Norfolk and Cumberland, near large pieces of yatc]-. 



K 2 



