ANOPLURORUM BRITANNIA. Ill 



band anteriorly ; antennae and trabeculae short, thick, and 

 yellow ; abdomen elongate and cylindrical, pale yellow 

 white, lateral fasciae deep liver-brown, narrow and inter- 

 rupted at the stigmatic orifice ; legs stout, pale yellow. 

 Length f to 1. 



I am induced to consider these two Insects, although dif- 

 fering considerably at first sight, as the adult and immature 

 state of the same species. I had drawn both and committed 

 them to copper, under an impression that they were spe- 

 cifically distinct, but since, upon examining many specimens 

 taken from recent Birds, I find such varieties in size, pro- 

 portion, markings, and colour, as to convince me that the 

 fig. 3 of plate 7, is nothing more than the last moult but 

 one ; many specimens in still earlier stages exhibit a greater 

 diversity of appearance, and it is only by comparing a series 

 that the identity of the whole can be inferred, sometimes 

 the fasciae are without the notch, at other times pale brown, 

 and extending nearly across the abdomen. I have received 

 this species in three different ages from the Rev. L. Jenyns, 

 taken on the Gannet (Sula Bassana), I have found it myself 

 both in the adult and immature state upon the same Bird, 

 and also on the Cormorant (Phalacrocorax Carbo), and the 

 Common Tern (Sterna hirundo). 



59. DOCOPHORUS ALCiiDiNis. Denny. (Louse of the 



King-fisher.) 



Plate VI. Fig. 1 . 



Pale fulvous-yellow ; head large, acuminate ; abdomen 

 oblong ovate ; head and thorax bright fulvous, the former 

 large, acuminate ; clypeus much produced, narrow, and 

 truncate, dusky, two faint lines from the antennae to the 

 occiput, base broad and rotundate ; eyes small ; antennae 



