STUDIES IN NEOTROPICAL MALLOPHAGA—-CARRIKER 155 
thorax and the other on the dorsal surface, inside the occipital band. 
The female apparently lacks the one on the dorsal surface, while 
the other is sometimes reduced to a spine. 
HEPTAPSOGASTER INEXPECTATA UNDULATA, new subspecies 
FIGURE 14, e-h 
Types.—Male and female, adults, from Crypturellus u. undulatus, 
collected by the author at Rurrenabaque, Rio Beni, Bolivia, September 
11, 1934; in collection of author. 
Diagnosis —Represented by the types and a female paratype. Very 
much smaller in all proportions than H. 7. tuawtlae, the male with 
front more flattened, sides of temples straight (instead of convex), 
with the tip of the last abdominal segment rounded and with the sub- 
marginal chitinized band V-shaped instead of flatly crescent-shaped. 
In the female the seventh segment is also of a very different shape, 
as well as the genital plate (see fig.). The male may be recognized 
at once by the shape of the endomeral plate, the tip of which is elon- 
gated oval (not truncated), and with what is apparently a small penis, 
bearing a median cross bar. The paramers are shorter and slenderer 
than in tuatlae, much resembling those of H. 7. bend, in fact, the whole 
genital armature is much smaller and especially slenderer than in 
tuxtlae. ‘The scent gland is of the conventional type of several races 
of H. mandibularis, of a slender, somewhat crescent shape. A male 
and four females taken on C. undulatus yapura, collected at Puerto 
Yessup, Peru, seem to be exactly the same; at least the male genital 
armature is. Measurements are given with those of H. 7. beni. 
HEPTAPSOGASTER INEXPECTATA BENII, new subspecies 
Figure 15, a—d 
Types.—Male and female, adults, from Crypturellus soué incon- 
spicuus, collected by the author at Chifiiri, Rio Beni, Bolivia, Sep- 
tember 3, 1934; in collection of author. 
Diagnosis —Represented by the types and one female paratype. 
This race is also close to H. 7. tuxtlae, both in male genital armature 
and other characters. The scent gland is somewhat different, as well 
as the shape of the last abdominal segment in the female. 
The metathorax is angulated on the posterior margin, with each 
side straight to the rounded posterolateral angle. In the male the 
third segment of the antennae is strongly hooked; in the female there 
are four short spines on abdominal tergites II to V, all inside of the 
pleural plates, in a line slightly converging anteriorly. 
The male genital armature is the smallest of any of the known races 
of inexpectata, being especially narrow, both the basal plate and the 
‘ 
