ANOPLURORUM BRITANNIJE. 191 



* * Head sub-rotundate ; abdomen oblong. 



6. TRICHODECTES SCALARIS. (Louse of the Ox.) 



Plate XVII. Fig. 9. 



Head and thorax bright ferruginous, the former obcor- 

 date ; antennae with the third joint the longest and fusiform. 



Trichodectes scalaris. Nitzsch. Germ. Mag. iii. p. 296. Steph. Cat. pt. ii. 

 p. 330. Burmeister Handbuch ii. pt. ii. p. 436. Pediculus Bovis. 

 Linn. Syst. Nat. ii. 1017. 9. Faun. Suec. 1946. Fabr. Spe. Insect, ii. 

 477. 7. Syst. Ent. 805. 6. Berk. Syn. i. p. 170. Turton. iii. 696. 

 Stewt. Elem. ii. p. 298. 



Head obcordate, bright ferruginous, with two fuscous 

 spots in front ; clypeus convex, lateral margin with a fus- 

 cous spot before the eye, and a somewhat angular fascia 

 from the anterior margin to the occiput ; eyes prominent ; 

 antennas pale, tawny, seated in the lateral sinus, slender, 

 the third joint the longest, fusiform and obtuse ; prothorax 

 about the width of the head, transverse ; metathorax small, 

 produced, truncate behind, and ciliated with a semicircular 

 depression in the centre ; abdomen pale tawny, finely pu- 

 bescent and oblong, the first six segments with a trans- 

 verse, ferruginous, or fuscous band on the upper half, and 

 a large spot at the apex of the same, and a narrow lateral 

 fascia on each, excepting the first and last two ; legs pale 

 tawny ; tibiae acutely toothed ; tarsi short ; ungues nearly 

 straight. Length ^. 



Common on Cattle, frequenting the mane. I have 

 also occasionally found it upon the Ass (Equus Asinus). 



7. TRICHODECTES EQUI. (Louse of the Horse.) 



Plate XVII. Fig. 7. 



Head and thorax bright chestnut, the former large, 

 transversely quadrate ; antennae with the third joint the 

 longest and clavate. 



