3:]2 BIRDS OF BRITISH GUIAXA. 



pnri of the crown, the breast, and a half inch of tlie tail-Eeathors 

 out of the slieath. Number three was pretty well feathered, except 

 for face, throat, under wings, and sides; while number four was to 

 all intents and purposes a real Parrot. The way in which the old 

 birds kept hidden was remarkable." 



Mr. C A. Lloyd (Timehri (2) ix. p. 273) writes as follows : — 

 " A very common Parrot about our rivers l^i P/'onns /uscks. . . . 

 At certain times it is liable to be infested with wandering nema- 

 toid worms, and one we saw shot on the Essequebo River was so 

 filled with the^e parasites as to render it a mystery how the 

 bird could exist at all. The worms were about an inch long 

 and almost transparent.'^ 



Genus DEROPTYUS Wagl. 



Deropfj/vs Wagler, Monogr. Psitt. p. 492 ; Abhan. Math. Pbys. K. B. 

 Akad. Mun. vol. i. 1830. Type D. accijyitrimts (Linn.). 



This genus is distinguished by having a tufted oil-gland, the 

 bi!l somewhat stout, the tail rather long, and the fe:itliers on 

 the najic and hind-neck long and erectile. 



214. Deroptyus accipitrinus. 

 Hawk-headed Caique. 



Fsittaciis accipitrinus Linn. Syst. Nat. 10th ed. i. p. 102, 17oS 



(Guiana). 

 Iferopttjns accipitrinus Cab. in Sehomb. Eels. Guian. iii. p. 726, 1818 ; 



Salvin, Ibis, 1886, p. 09 ( Camacusa, Merume Mts.) ; Salvad. Cat. B. 



Brit. Mus. XX. p. 335, 1891; Llovd, Timehri (2) ix. p. 272, 189-3; 



Braboimie & Chubb, B. S. Amer.' i. p. 92, no. 869, 1912. 



" Hia-Hia," " Hawk-headed Parrot'' (Llo^/d). 



Adult mcde. Buck, rump, wings, tail, under wing-coverts, sides 

 of body, and under tail-coverts green ; flight-quills black, inner 

 secondaries green on the outer webs ; outer webs of outer t;iil- 

 feathers bluish ; the elongated feathers on lower hind-neck and 

 sides of neck crimson-red, edged with l)lue at the tips ; breast and 

 abdomen similar, but the colours darker in tone, the tips of the 

 feathers on the sides of the breast are edged with green ; fore 

 part of head dull white ; fore part of cheeks, sides of face and 

 nape dusky with white shaft-lines to the feathers ; lower aspect 



