ANOPLURORUM BRITANNIA. 161 



Goniodes chelieornis. Nitzsch. Germ. Mag. iii. p. 293. spe. 2. Goniodes 

 chelicornts. Steph. Cat. pt. ii.p. 333. Goniodes chelicornis. Lyonet, 

 Mem. du Muse, t, 18. p. 268. pi. 12. fig. 7. Goniodes clielicornis. 

 Children's Appen. to Back's Land Expe. p. 539. 



Head and thorax tawny-yellow, the former in the female 

 as wide as the abdomen ; clypeus broad arid convex, with 

 two deep chestnut fasciae before the antennae, temporal 

 margin slightly sinuated, superior angles very prominent and 

 obtuse, occiput concavo-truncate, with a deep chestnut mar- 

 gin, vertex concave; eyes large, and antennas pale chestnut, 

 the first joint in the male very thick, obtusely denticulate on 

 the inferior side, second conical, third somewhat panduri- 

 form ; prothorax transverse, posterior margin convex ; meta- 

 thorax large, sides convex, posterior angle sub-truncate ; 

 abdomen oval, pale, yellow-white, finely pubescent, lateral 

 margin tawny-yellow, each segment, except the first and last 

 two, with a transverse deep chestnut spatulaform fascia; legs 

 tawny yellow, thick, and strong. Length $ 1 $ 1. 



This species I have found two or three times upon the 

 Capercaillie (Tetrao Urogallus), and although I feel satis- 

 fied that it is quite distinct from the following species, it is 

 extremely difficult to reduce the distinctive characters to 

 words. The males bears a strong resemblance to each 

 other. In the females, however, the difference is clearly 

 seen in the larger and broader size of the G. Chelicornis 

 over the G. Tetraonis, the magnitude arid lateral propor- 

 tions of the head, also the posterior angle of the meta- 

 thorax, &c. 



7. GONIODES TETRAONIS. Denny. (Louse of the Black 

 and Red Grouse.) 



Plate XIII. Fig. 3. 



Chestnut-yellow, shining, and smooth; head subqua- 

 drate, temporal angles acute ; metathorax narrower, and 

 more sinuated than the preceding. 



M 



