CLASS V. INSECTA. 141 



Genus 3. PETROBIUS. LeacKs Zoological Miscellnny, vol. iii. 



tab. 115. Lepisma. Fab?-.? 



Antcytna longer than the bodv, inserted under the eyes : maxUhtri) palpi 



six-jointed; the tiftli joint inversely conic, tlie sixth conic: labial 



palpi with the lust joint obliquely truncate, with the apex acute, and 



not membranaceous : ej/es large and coiuiguous. 



Sp. 1. Fct. mariliinus. Blackish, with golden scales: feet yellowjsh: 



setae of the tail annulated with white. 

 Inhabits all the rocky shores of Britain. Dr. Leach first obser\'cd this 

 species on the Devonshire coast, and afterwards in Ireland, Scotland, 

 and Wales. It is very active, runs fast, and leaps to a great distance. 

 Dr. L. suspects that it has been confounded by Fabricius vvit)i For- 

 Incina poli/poda. 



Fam. II. PoBUKAD.'E. Leach. 



Palpi not exserted nor very conspicuous: antermcc composed of four 

 joints, the last sometimes formed of several other minute articula- 

 tions : tail forked, and bent beneath the abdomen. 



Genus 4. PODURA. Linn., Geoff, Be Geer., Fahr., Lam., Her- 

 mann, Leach. 

 Antenna with the last joint solid, not articulated : abdomen elongate, li- 

 near. 

 Sp. 1. Pod. plumbea. Lead-coloured, sliining, with griseous head and 



feet. 

 Podura plumbea. Linn., Fabr., Latr., Ij^acli. I'odure plombee. T)c 



Geer. La Podure grise commune. Geoff'. 

 Inhabits Europe under stones. 



There are a great number of species in this and the following ge- 

 nus, which are worthy of attention. Fabricius has placed these 

 two genera together without the slightest distinction, and has de- 

 scribed several species, which it is hoped some future zoologist will 

 be induced to examine. 



Genus 5. SMY^iTIlURUS. Lair., Leach. Podura. Linn., Fabr., 



De Geer, Geoff. 

 Sp. 1. SmT/n.ft'.scus. B(«ly entirely brown. 

 La Podure brun enfumee. Geoff. Podura atra. Linn. ? Fubr. Smyn- 



thurus fuscus. Lair., Leach. 

 Inhabits Europe; is common on the ground and in damp hedges. 



Order II. ANOPLURA. Leach. 

 Parasita. LatrciUe. 



Tail without seta3 or filaments : mouth in some furnished with two 

 j teeth (or mandibles.') and an opening, beneath; in others with a 

 tubulose very short haustellum. 

 The animals of this Order are parasitical; and were by Latreillc 



