242 MONOGRAPHIA 



the lateral margin ; prothorax subquadrate, lateral margin 

 rotundate, with a small papilla on each side anteriorly, base 

 concave and depressed ; metathorax large and sub-conical ; 

 abdomen claviform, depressed, with a prominent pitchy- 

 brown margin ; legs pale, fulvous yellow ; femora thick, the 

 posterior pair long and elliptical ; tarsi short, the first joint 

 with an involute pulvillus. Length 2. 



The first specimens of this species, which I had an op- 

 portunity of examining, were forwarded by P. J. Selby, Esq. 

 from the Fieldfare (Turdus pilaris), since which I have seen 

 other specimens from the Ring Ousel (Turdus torquatus). 

 I have also a specimen from the Chaffinch (Fringilla Coe- 

 lebs), which differs in no respects, except in being little more 

 than one line in length; and another like the last from the 

 Lesser Spotted Woodpecker (Picus minor). 



2. PHYSOSTOMUM BOMBYCILL.E. Denny. (Louse of the 

 Bohemian Wax- Wing.) 



Plate XXIII. Fig. 5. 



Pale testaceous, smooth and shining ; head wider than 

 the prothorax ; clypeus broad ; legs short and thick. 



Head oblong, sub-conical ; clypeus broad and rotundate, 

 vertex concave, lateral margin depressed before the eyes, 

 occiput rotundate, temporal angles short, but prominent; 

 eyes like the preceding ; prothorax quadrate, rather nar- 

 rower than the head, lateral margin slightly rotundate, base 

 sub-concave, the angles broad and ciliated, with stiff hairs, 

 anterior margin with two small foveolae ; metathorax trans- 

 verse, strongly marginate ; abdomen sub-cylindrical, deeply 

 marginate, the dorsal space rather darker ; legs short and 

 thick. Length 1. 



This species was obtained from a specimen of the Bomby- 

 cilla garrula, which was shot near Leeds. I have one also 



