An Account of the Bird-lice of the Genus Docophorus. 158 
vil., No. 1, p. 9, Feb. 1912). The specimens so separated were determined 
by Prof. Kellogg as D. acutipectus. In October of the same year Mr Wm. 
Evans published, in his “ List of Mallophaga taken in the Forth Area” (Proc. 
Roy. Phys. Soc. Edin., vol. xviii., No. 4, p. 270, 1912), records of D. celedovus 
(from U. troile, A. torda and F. arctica), and D. merguli (from I. alle) ; while 
in Ent. Mo. Mag., p. 113, 1913, the writer drew attention to Denny’s neglected 
D. megacephalus. 
Assuming, as is done here, that D. platygaster, D., is not the normal 
parasite of U. trode, the records of D. calvus now given form an addition 
to the British, or for that matter to the European, list. A word of caution, 
however, as to the meaning of such “additions” is necessary. We are not 
signalising the introduction of an American element into our fauna in 
adding D. acutipectus and D. calvus to our lists. The case is not parallel say 
to the discovery of an American bird in Britain, or to the recent occurrences 
of the Plague Flea (Xenopsylla cheopis) in Portsmouth and London. We 
are simply recognising in Britain insects first described from American hosts. 
The five species of Docophori enumerated below might, I believe, have 
been collected in this country ever since there were Auks on our waters with 
Docophort upon them. 
In the following list the symbol © = immature. I have given the 
names of all friends who have sent or secured hosts for this investigation. 
Where “leg.” occurs after a name, the correspondent sent the parasites 
and vouched for the host. In other cases, the writer is personally 
responsible. 
DocorHorus acutiPEctus, Kellogg (1896). 
Docophorus acutipectus, V. L. Kellogg, New Mallophaga, pt. 1, p. 84, pl. iii. fig. 4 (1896). 
55) 
From Vratercula arctica.—(1) Ollaberry, 5:vi:12, 4 g, 9 9, ©: 1V:v:13, 2 9: 
June 1913, 2 g, 2 9, with D. calvus, Kell. (2) Gluss Voe, 20:1:13, 5 4, 
6 9, ©, with D. celedowus, N. (3) Off Little Roe, Yell Sound, 29:v-:11, 
6222 10:xi:13, 6 4 7 Q 3 ©, with D. calvus, Kell., and D. 
celedoxus, N. 
DocorHorus cAtyus, Kellogg (1896). 
Docophorus calvus, V. L. Kellogg, New Mallophaga, pt. 1, p. 79, pl. ii. fig. 1 (1896). 
From Uria troile (ringed form).— Dunbar, 1:ii:10, 9 ¢, 6 2, ©, per H. M‘Kay, 
leg., bird shot by Mr Inglis. 
Prom Uria troile (typical form).—(1) Ollaberry, 8: xii:10, 15 g, 14 9, 4 ©: 
29:iv:11, 8 g, 109, 5 ©, with D. celedowus, N.: xii:12, 4 g, 13 9: 
19:11:13, 17 g, 27 9, ©. (2) Gluss Voe, 22 :iii.:11, 18 g, 28 9,5 ©: 
22:11:12, 22 3,139, 5 ©, with D. celedoxus, N.: 2:iii:12, 11 4, 19 9, 
