36 MONOGRAPHIC, ETC. 



as however this work would be imperfect without some 

 notice of them, I therefore append their specific characters 

 from Dr. Burmeister's Genera Insectorum. 



1. Hcematopinus sphcerocephalus. (Louse of the Squir- 

 rel.) Capite orbiculari ; pallidus ; segmentis abdominalibus 

 quinque anticis dente recto armatis. Long. |. Habitat 

 in Sciuro vulgari. 



2. Hcematopinus serratus. (Louse of the Common 

 Mouse.) Capite breviori, genis post antennas incrassatis ; 

 lividus, abdomine in basi angusto, segmentis utrinque 

 dilatatis, marginem abdominis serratum referentibus. 

 Long. . Habitat in Mure musculo. 



3. Hcematopinus nffinis. (Louse of the Field Mouse.) 

 Pallidus, sincipite parabolico genis post antennas incras- 

 satis ; thorace rhombeo. Long. . Habitat in Mure agrario 

 et sylvatico. 



4. Hcematopinus setosus. (Louse of the Harp Seal.)* 

 Fuscus ; undique fusco setosus. Pediculus Phocse. Lucas 

 in Guer. Mag. de Zool.iv. c. 9. p. 121. Habitat in Phoca 

 groenlandica. 



5. Hcematopinus crassicornis. (Louse of the Red Deer.) 

 Capite majori cum thorace angustiori pedibusque testaceo ; 

 abdomine albido; spiraculis non prominentibus. Long. f. 

 Redi Exp. tab. 23. fig. sup. Hab. in Cervo Elapho. 



6. Hcematopinus stenopsis. (Louse of the Goat.) Tes- 

 taceus unicolor ; abdomine elongato ovali, pilis longis 

 sparsis obsesso. Long. 1. 



* I am indebted to the kindness of Robert Ball, Esq. of Dublin, who, 

 with a view of assisting me with the parasites of our Mammalia, forwarded 

 some, which were found by Dr. Belliugham in the posterior nares of a 

 specimen of Halichcerus Gryphus. These, however, were not the Hsema- 

 topinus setosus, but belonging to another class, ACARI. 



