STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 163 
The female is unknown, the subspecies being described from a 
single male, the type. The head is practically of the same width as 
in nothocercae, at both frons and temples, but is considerably longer, 
both at occiput and temples, and with temples proportionately longer 
and more pointed; the temporal bands are much more crenulated and 
the internal projections at the frons are somewhat shorter and thicker. 
In HZ. temporalis and its races there seem to be no hairs whatever on 
the occipital margin of the head, as in inexpectata; however, in H. t. © 
femininus there are very small bristles in the same places at which 
inexpectata has long hairs. 
HEPTAPSOGASTER PLATYCEPHALUS Carriker 
FIGURE 16, h, 7 
Heptapsogaster platycephalus CarrikeR, Lice of the tinamous, p. 120, pl. 17, figs. 
1—1c, 1986. (Host: Cryturellus soui inconspicuus.) 
I have now been able to examine a large series of specimens of this 
interesting species taken on five races of Crypturellus sowt, C. obsole- 
tus punensis, and C’. u. undulatus. In my previous report (1936) I 
placed all specimens taken up to that time (except those from C. s. 
sout) under the nominate form. Additional material, together with 
more careful study, shows that some of these must be given subspecific 
rank, especially those from C. obsoletus pumensis, of which there is a 
large series from numerous individual hosts taken in Peru and Bo- 
livia. The whole series is very uniform and presents characters that 
may not be disregarded. The single male from Nothocercus nigro- 
capillus, previously listed under platycephalus has been discarded, 
since I am convinced that it was not its true host, having become ac- 
cidently mixed with that material in some unknown manner. 
Specimens from C’.. soud ochraceiventris, C. s. meserythrus, and C. s. 
mustelinus are all so very close to the type series that they must re- 
main there, while two males and a female from C. u. undulatus are so 
close that to separate them would savor too much of hair-splitting. 
The male genitalia in these specimens from C’. uw. undulates are exactly 
like those of platycephalus, except slightly smaller, but of the same pro- 
portions, although the paramers may be a trifle slenderer, as well as 
the endomeral plate, but the body and head measurements are so close 
to platycephalus that practically all the differences easily fall within 
the range of individual variation. It was previously stated that a 
scent gland was present on the fifth abdominal segment in the male 
(Carriker, 1936, p. 123), but no description or figure was given. The 
fifth pleurite is incised on the posterior portion of the inner margin 
to receive it. The gland is elongated globular in shape, with a tubu- 
lar outlet on the inner face (see figure). This gland differs slightly 
in size and shape in the different races of platycephalus. 
