STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 199 
Specimens taken on Tinamus s. serratus are referrable to P. a. aber- 
rans, as stated previously (Carriker, 1936, p. 157). The only differ- 
ences worthy of note are the following: The length of head at tem- 
ples in the male is less in insects from 7’. s. serratus, while the width is 
about the same, and the length at occiput exactly the same; the width 
at frons is the same, while at the point posterior to the antennal fossae 
slightly less in the type of aberrans, as well as at the lateral emargina- 
tion. Practically all other differences in measurements may well be 
attributed to individual variation. 
PTEROCOTES TAOI Carriker 
FIGURE 25, a-—c 
Pterocotes aberrans taoi CARRIKER, Lice of the tinamous, p. 158, pl. 26, figs. 3, 3a, 
1936. (Host: Tinadmus tao kleeéi.) 
Male cotype, from Zinamus tao weddelli, collected by the author 
at Palmar, Dept. Cochabamba, Bolivia, July 12, 1937; in collection 
of author. 
This species was described from a single female. I have since been 
able to secure specimens of what is apparently this species from the 
following hosts: Tinamus tao weddelli, Palmar, Bolivia, one male; 
Tinamus t. tao, Sierra Perij4, Colombia, one male and 10 females. 
The two subspecies of Zinamus tao (kleec and weddelli) are gen- 
erally considered to be inseparable, so that we may infer that the male 
_Pterocotes taken on 7’. t. weddellé is the male of the Pterocotes described 
from a female collected on 7’. tao kleet. 
The single male collected on 7’. ¢. tao has, unfortunately, lost its 
head, but the measurements of the body segments and the genitalia 
are very close to those of the male taken on 7. tao weddelli (male 
cotype of P. taoz). The only appreciable differences are the follow- 
ing: The abdomen is some smaller (not a reliable character); the 
basal plate is a little longer and the base of the paramers somewhat 
narrower (0.046 against 0.062) ; the endomeral plate is a trifle longer 
and narrower. The females from 7’. ¢. tao are also very close to the 
type of P. taoi, the only appreciable differences in measurements being 
the following: Mesothorax longer and wider; abdomen a little smaller, 
and genitalia considerably narrower (0.065 against 0.11). However, 
these slight differences do not warrant the separation of the speci- 
mens from the three subspecies of Tinamus tao, and it seems best to 
call them all Pterocotes taot Carriker. 
The male of P. taoi differs from the males of P. a. aberrans and 
P. a. mexicanus as follows: Whole body, all body segments, and genital 
armature very much smaller, with the single exception of the width of 
the head at the lateral emarginations, which is the same (0.31 against 
0.803) ; the basal plate and paramers are but little more than half 
