140 MODERN SYSTEM. 



elongated maxillae : Up simple. Wings two or none. {Metamorphosis 

 coarctata.) 



Subclass I. INSECTA AMETABOLIA. 



Order I. THYSANURA. Leach. 

 TiiYSANOrRA. Lafreilk. 



Tail furnished with setje or filaments: mouth wilh mandibles, palpi, la- 

 brum, and labium. 



The body of the animals which compose this Order is generally 

 covered withscales or hair. Their motion is extremely rapid, or per- 

 formed by leaping. 



Fam. I. Lepismad.t;. Leach's MSS. 



Talpi very distinct and prominent, or exsertcd : antcnnte composed of a 

 vast number of very short joints : tail with three exserted setae. 



Stirps 1. — J?o(/y depressed, and moving with a running motion : tail 



with three nearly equal filaments. 



Genus 1. LEPISMA. Linn., De Gecr, Fuhr., Lair., Leach. Se- 

 TOURA. Broun. Eorbicina. Geoff'., Lamarck. 

 Antenna, inserted between the eyes: muxiUury palpi slender, composed 



of five joints, the last of which is elongate and very slender: labial 



palpi with their joints compressed, dilated, and round : e^jcs small and 



remote. 

 Sp. 1. Lep. saccharina. Body covered with silvery scales. 

 Inhabits Europe. It is very common amongst books, clothes, Scc. 



and wanders about during the night. It is suppascd to have been 



ovisinally introduced into Europe from America, where it is said to 



live amongst sugar. 



g-j-jp^pj:. a — Body convex, v.ith an arched back formed for springing. 

 Tail with three setae, the middle one longest. 



Genus 2. FORBICINA. Geoff., Leach. Lepisma. Linn., Olivier. 

 Ma CHI LIS. Latr. 



Antenna: inserted under the eyes, shorter than the body : maxillari/ palpi 

 thick, witli six joints, the last conic : labial palpi with the apex mem- 

 branaceous : eyes large and contiguous. 



Sp. 1. For. polypoda. Smoky brovrn, wi^ obscure rust-coloured spots. 



Lcpisma polypoda. Linn. Lepisma saccharina. Vill. Ent. 4. tab. 11. 

 fig. 1. Machilis polypoda. Latr. Gen. Crusl.et Ins. 1. p. 165. tab. 6. 

 fg. 4. magnified. La Forbicine cylindrique. Geoff. Forbicina poly- 

 poda. Leach. 



Inhabits all the temperate parts of Europe, and is found in woods and 

 under stones. 



