STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 105 
Specimens of Strongylocotes complanatus from Crypturellus obso- 
letus punensis and C.. 0. ochraceiventris were considered by Carriker 
(1936) to be the same. Since then I have secured additional material 
from C@. 0. punensis and also, through the courtesy of Dr. Hopkins, 
authentic specimens of S. c. complanatus (Piaget) from Crypturellus 
o. Obsoletus, collected at Novo Teutonia, Brazil. 
A careful study of all this material has resulted in the discovery 
not only that the specimens of S. complanatus from C. obsoletus punen- 
sis and C.. 0. ochraceiventris are very different from true complanatus, 
but also that those from C’. obsoletus punensis are different from both 
of the others. 
The parasites from @. 0. ochraceiventris are without a name and are 
described below as Strongylocotes complanatus intermedius. How- 
ever, there is a name available for those taken on C’. obsoletus punensis, 
since the species described by Carriker (1936, p. 80) as Mirmocotes 
nirmoides from C. obsoletus punensis has proved to be the immature 
of Strongylocotes, and a description of the adult follows that of 
S.c. intermedius. 
Diagnosis of S. c. intermedius.—The head of the male in true com- 
planatus is longer and narrower at the temples; the sides of the thorax 
are quite straight (not slightly concave) and have a pronounced 
“tooth” at the anterolateral angle; the mesothorax seems to be the same, 
but the metathoracic apron has the sides more convex and the pos- 
terior margin slightly concave. The abdomen is longer and is nar- 
rower at the third and fourth segments, while the abrupt narrowing 
of the fifth segment is much less pronounced, so that in this character 
antermedius is intermediate between true complanatus and S. c. inter- 
ruptus Carriker. The pair of “segments” lying alongside the last 
abdominal segment are also of different shape, having the posterior 
margin more oblique (less transverse), while the whole segment is 
differently shaped. The wide, deeply pigmented, longitudinal band 
along the inner edge of the pleural plates, so noticeable in the male of 
intermedius, is entirely absent in the male of complanatus, although 
present in the female (asin S. pellucidifrons, new species). Inthe male 
of complanatus a darker band is present along the outer edge of the 
pleural plates, while the remaining area is unicolored, but in the female 
the reverse is true. In zntermedius the male has both the marginal 
and inner bands, while in the female only the submarginal one is 
present. 
There is a slight difference in the shape of the paramers, those of 
complanatus being uniformly convex on the outer margin, while in 
imtermedius they are concave medially, then curving together at the 
tips. 
In complanatus there is a marked difference between the sexes in 
the shape of the head. The male has the front much flattened, while in 
