CLASS V. INSECTA. 
143 
®P- 2 - Fed. cere icalis. Body oval, lobed, cinereous, with a black inter- 
rupted band on either side. 
Pou ordinaire. Geoff. Pediculus humanus. rnr. Linn. Pediculus 
cervicalis. Latr., Leach. 
inhabits the heads of man throughout Europe. In Britain it is ex- 
tremely common, especially in the heads and upper part of the 
Uecks of children, whence they are extracted by means of a fine- 
toothed comb, or are destroyed by rubbing calomel mixed with a 
little fat amongst the roots of the hair. This species has been by 
Many authors confounded with the preceding species. 
Genus 8. HffiMATOPINUS. Leach. 
' , °ru v narrow and distinct from the abdomen : abdomen very broad. 
■V 1. Ham. Suis. 
Pediculus Suis. Lime. Ilaematopinus Suis. Leach's Zool. Misc. iii. 06. 
Pi- 140. 
Inhabits swine. 
Pam. II. Nimmid.c. Leach. 
Sleuth with a cavity, and two teeth or mandibles. 
Genus 9. NIRMUS. Hermann, leach. Ricinus. JDe Geer , Oliv., 
Lam., Latr. Pediculus. Linn., Geoff., I'abr, 
The character of this genus is given in that of the tribe. All the 
species inhabit birds. The term ricinus having been used in botany 
's rejected, and that of Dr. Hermann’s is adopted. 
^P- 1. Nir. Cornicis. Whitish: head heart-shaped; segments of the 
thorax on each side produced into a tooth : abdomen oval, trans- 
versely banded with brown, 
iicinus Cornicis. Latr. 
^habits the Corvus Cornix of Linne. 
Subclass II. INSECTA METABOLIA. 
Order III. COLEOPTERA. 
^fder Coleoptera. Linn., Cuv., Lam., Latr., fyc. 
^' ass Eleuterata. Fair. 
. Phis Order is divided into five great sections, from the general num- 
er joints in the tarsi. 
Section I. — Pentamera. 
g j lle number of joints in the tarsi is generally five, but in some of 
- Aquatic genera the number is less. 
