STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 83 
All the remaining genera, except one, now known to be parasitic on 
the grassland-inhabiting tinamous belong to the family Heptapsogas- 
tridae, those belonging to the Philopteridae being restricted to the 
woodland group of tinamous (Pseudolipeurus, an offshoot of the old 
genus Lipeurus, and Pseudophilopterus, most likely derived from 
Philopterus or its progenitor). However, a new genus is described 
in this paper (Z¢namotaecola) from 7inamotis which is a philopteroid 
and seems to bear the same relation to Degeeriella that USGL 
philopterus bears to Philopterus. 
Our knowledge of the Mallophaga from the grassland ‘Sn DUS is 
much less extensive than of the woodland-inhabiting forms, but the 
evidence now in hand seems quite conclusive that all, or nares all, 
the genera of lice infesting them are peculiar to that group of hosts. 
I have yet to find any trace of the “scent” gland on any species of 
Mallophaga infesting the grassland tinamous, while many of the 
species now placed under Heptapsogaster and allied genera possess 
them. I should not yet say that the presence or absence of scent glands 
should be taken as a generic character, but certainly these organs 
deserve closer attention. 
I agree with Miss Clay (1937, p. 185) in her suggestion that per- 
haps some of the species now placed by me under Heptapsogaster 
(such as platycephalus and peters?) should be removed from that 
genus, but I do not agree with her suggestion of placing them under 
Megapeostus. I think that any revision of this kind should await 
additional material and further study. 
In a friendly spirit I might make more or less the same criticism of 
Miss Clay’s arrangement of the species and genera in her splendid re- 
port on the Mallophaga of the gallinaceous birds. Her genus Ovyli- 
peurus is, to my way of thinking, entirely too unwieldly and seems 
to contain species not congeneric. This genus contains species from 
both Old and New World gallinaceous birds and from such distantly 
related avian families as Phasianidae, Cracidae, and Perdicidae. 
There are many superficial resemblances between some of the parasites 
from these three families, but there are more actual differences be- 
tween some of them than alba are between some of the genera of their 
hosts. 
I fully realize the inadequacy of my 1936 report on the lice of the 
tinamous and know that certain changes in my original classification 
are inevitable, but I do not think that these changes should be made 
without ample material to justify them. Quite a number of correc- 
tions and changes have already been made by myself and also by other 
workers, some of which I heartily endorse; others I cannot accept, 
because my own perhaps more ample material does not corroborate 
them. My hope is that in the present report I may have added con- 
