90 MONOGRAPHIA 



Mr. Heysham sent it to me from the Larus islandicus, 

 canus, and tridactylus ; Rev. L. Jenyns from the Larus ridi- 

 bundus, and Mr. Thompson from the Larus rissa, marinus, 

 argentatus, and ridibundus, and from several of the 

 above species of Gulls I have taken it myself. The female 

 has the abdomen much broader than the male and more 

 rotund. This species is very variable in size, and also in 

 the extent of the lateral abdominal fasciae, some specimens 

 exhibiting scarcely any of the pale discoid space. 



34. DOCOPHORUS CONICUS. Denny. (Louse of the 

 Golden Plover,) 



Plate V. Fig. 2. 



Pale fulvous yellow; head large, sub-conical; abdomen 

 elliptical. 



Head chestnut, large and conical ; clypeus produced, a 

 transverse depressed line between the trabeculse, base ro- 

 tuudate; eyes small, black; trabeculoe acute and strong; 

 aiitennse short, thick, filiform ; prothorax transverse, chan- 

 nelled, posterior margin rotundate ; metathorax depressed 

 at each shoulder, posterior margin subangular, ciliated with 

 stiff hairs; abdomen large, acutely elliptical; legs short, 

 chestnut ; femur with a dark annulus. Length i. 



I have seen but a single specimen of this species which 

 I took from the Golden Plover (Charadrius pluvialis). 



35. DOCOPHORUS SERRILIMBUS. (Louse of the Wryneck.) 



Plate VII. Fig. 9. 



Pale fulvous yellow ; head elongate, triangular, lateral 

 margin blackish brown. 



Docophorus serrilimbus. Burmeister Handbuch ii. pt. ii. p. 427. spe. 23. 

 Head elongate, triangular; clypeus much produced and 

 truncate, with an acuminate depression and two semicir- 



