G. F. Ferris 81 
unong the Mallophaga but it appears to be cpiite definitely a member of the 
Trimenopon group. 
I am naming this genus in honour of Mr Lancelot Harrison as a token of 
appreciation of the stimulating quality of his work on the Mallophaga. 
Harrisonia uncinata n.sp. 
Figs. 2 c, 3 c, 4 d, 6. 
Specimens Examined. A single female, the holotype, from Hoplomys 
yymnurus ; one male, the allotype, from Nelomys mime; and one male paratype 
from Proechimys semispinosus\ all from San Javier, North Ecuador. The 
specimens are from skins in the United States National Museum and a para- 
type of the new species will be deposited with that institution. All the hosts 
are members of the rodent family Octodontidae. 
Female (Fig. 6). Length 1-1 mm. General form rather stout. Head 
(Fig. 2 c) as described for the genus. The clypeal region is very small, is .semi¬ 
circular in form and is bounded on each side both dorsally and ventrally by 
Parasitology xiv 
