78 MONOGRAPHIA 



two chestnut diagonal bands passing to the occiput ; clypeus 

 narrow and produced, and sub-emarginate, with a some- 

 what acuminate depression, terminating posteriorly in a 

 deep chestnut spot, base broad and rotundate ; trabeculae 

 strong, conical, slightly curved ; antennae thick, conical, and 

 yellow ; prothorax transverse, with a dark spot on each side ; 

 metathorax sub-triangular, deep chestnut, channelled, with 

 a humeral liver-coloured spot ; abdomen broad, greyish 

 white, with the first segment, and the transverse lateral 

 fasciae bright chestnut, the latter acutely triangular, sutures 

 of the posterior segments deeply sinuated in the centre ; 

 legs strong and yellow ; posterior femora very short, and 

 somewhat angular. Length j. 



This species, which is the constant parasite of the Alca 

 Torda, I have also found upon two nearly allied genera, 

 the Puffin (Fratercula arctica) and the Foolish Guillemot 

 (Uria Troile), upon which birds it has also been found by 

 Mr. Heysham at Carlisle ; the brilliant colours which render 

 this species very striking, are occasionally changed to 

 nearly black. 



18. DOCOPHORUS AURATUS? (Louse of the Woodcock.) 



Plate IV. Fig. 5. 



Head and thorax bright tawny yellow ; clypeus narrow ; 

 abdomen pale, tawny-yellow white, with a fuscous margin, 

 last segment bright chestnut and rotundate. 



Docophorus auratus? Nitzsch Germ. Mag. iii. p. 290 ; Steph. Cat. pt. ii. 

 p. 331. Burmeister Handbuch ii. pt. ii. p. 426, sp. 18. ? 



Head triangular ; clypeus produced and narrow, with an 

 acuminate depression, base rotundate, a depressed line 

 between the eyes, and two deep chestnut diagonal bands 

 from the antennae to the occiput ; trabeculae and antennae 



