STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 213 
most of the material from other hosts. The measurements are larger 
than for the male (as would be expected), but the proportions run 
about the same except in the width of the mesothorax, which is wider, 
but this is also found to be true in specimens from 7’. s. serratus and 
T. m. castaneiceps. We may therefore safely assume that the two 
females from 7’. ¢. weddelli are Ornicholax alienus taot. 
Ficure 27.—DocorHorocoTes and ORNICHOLAX 
a, Docophorocotes sexsetosus secundus, new subspecies: Male genitalia. 
b, Ornicholax alienus robustus Carriker: Male genitalia. 
c, O. a. mexicanus, new subspecies: Male genitalia. 
d, O. a. boliviensis, new subspecies: Male genitalia. 
é, O. a. taoi Carriker: Male genitalia. 
The Mexican material from 7. m. percautus seems to average the 
largest, while specimens from 7. m. fuscipennis are the smallest. 
However, in most cases the proportions run about the same and the 
differences in size seem to fall within the limits of individual variation 
for O. a. robustus. Nevertheless when we examine the male genital 
armature we find that there are discrepancies that may not be disre- 
garded. These differences are mostly in the shape of the endomeral 
plates, but the paramers also differ, so that it seems best to give some 
of them subspecific rank. 
Apparently the genus Ornicholax is confined to the avian genus 
Tinamus and, like other genera found on the tinamous, is composed of 
quite a number of closely related forms, so close, in fact, that all known 
up to the present time (5 or 6) may be classed as conspecific with 
alienus, although they fall into two groups, viz: solétarius (=alienus?) 
