MODERN SYSTEM. 
140 
elongated maxilla: lip simple. Things two or none. ( Metamorphosis 
coarctata.) 
Subclass I. INSECTA AMETABOLIA. 
Order I. TIIYSANURA. Leach. 
TiiysanotjrA. Latrcille. 
Tail furnished with seta or filaments : moulh with mandibles, palpi, la- 
brum, and labium. . ., 
The body of the animals which compose this Order is generally 
covered with scales or hair. Their motion is extremely rapid, or per- 
formed by leaping. 
Earn. I. Lepismadje. Leach’s MSS. 
Palpi very distinct and prominent, or exserted : antenna: composed of a 
vast number of very short joints: tail with three exserted setae. 
St-ibps 1 . — Body depressed, and moving with a running motion : tail 
with three nearly equal filaments. 
Genus 1. I.EPISMA. Iam., Ve Geer, Fair., Latr., Leach. Se- 
TOirtA. Broom. Forbicika. Geoff'., Lamarck. 
Antenna inserted between the eyes: maxillary palpi slender, composed 
of five joints, the last of which is elongate and very slender: labial 
palpi with their joints compressed, dilated, and round : eyes small and 
remote. ..... . 
Sp 1. Lep. saccharine. Body covered with silvery scales. 
Inhabits Europe. It is very common amongst books, clothes, &c. 
and wanders about during the night. It is supposed to have been 
originally introduced into Europe from America, where it is said to 
live amongst sugar. 
Stirps 2.— Body convex, with an arched back formed for springing- 
Tail with three set®, the middle one longest. 
Genus 2. FORBICTNA. Geoff., Leach. Lepisma. Linn., Olivier- 
Machieis. Latr. 
Antenna inserted under the eyes, shorter than the body : maxillary palpi 
thick with six joints, the last conic; labial palpi with the apex mem- 
branaceous : eyes large and contiguous. 
Sp. 1. For. polypoda. Smoky brown, with obscure rust-coloured spots. 
Lepisma polypoda. Linn. Lepisma saccharina. YUl. Ent. 4. tab. G- 
ffn. 1. Machilis polypoda. Latr. Gen. Crust, et Ins. 1. p. 105. tab. ■ 
fig. magnified, La Forbicine cylindrique. Geoff. Forbicina pob' 
poda. Leach. j 
Inhabits all the temperate parts of Europe, and is found in woods a 
under stones. 
