STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 119 
the temples in the female; the pterothorax is but little wider than the 
abdomen in the male, and the same segment is narrower in the female 
than in the male; the terminal segment is smaller, being the same 
length as in angulocapitis, but considerably wider; the hairs are short 
and fine at tip of abdomen, longer along the sides and slender; the 
pterothorax is longer posteriorly, the angle rounded, but less so than 
in angulocapitis (see fig.). 
STRONGYLOCOTES PELLUCIDIFRONS, new species 
FIGURE 7, a-c 
Types.—Male and female, adults, from Zinamus major percautus, 
colleted by the author on Cerro Tuxtla, Veracruz, Mexico, March 28, 
1940; in U. S. National Museum. 
This species presents a combination of the characters of S. angu- 
locapitis Carriker and S. spinosus (Piaget), having the shape of the 
head, prothorax, and last abdominal segment in the female similar 
to the former, with the mesothorax of the latter. The only other 
known species of the genus that have the last abdominal segment, in 
both sexes, similar to the present one are lapogonus, wernecki,? and 
complanatus (also the female in angulocapitis), while the only ones 
with a similar-shaped head (and lacking the median spur on the 
clypeal band) are spinosus, subspinosus, wernecki, and angulocapitis. 
Ali the species possessing this type of head have the metathoracic 
apron circular on the posterior margin, while all the others have it 
straight, or nearly so (slightly concave in ipogonus). Perhaps the 
most unique character possessed by this species, and not found in any 
other of the genus, is the hyaline border around the front of the head, 
beginning about halfway between the trabeculae and the frons. This 
hyaline border is slightly wider at the sides, where it measures 0.03 
mm. It was from this character that the species received its name. 
The genital armature is of the same type as complanatus but differs 
in having the basal plate constricted apically and in having the 
paramers curving outwardly toward their tips, instead of inwardly, 
as In complanatus. 
A detailed description of the male is unnecessary since all essential 
characters are clearly delineated in the accompany figures, while the 
last two abdominal segments of the female are also figured. The 
heavy, deeply pigmented, longitudinal bands across the pleural plates 
in the female are similar to those in angulocapitis. In addition, the 
2 Strongylocotes wernecki Guimaraes and Lane, from Tinamus solitarius, is very close to 
S. pellucidifrons but lacks entirely the hyaline border around the front of the head. 
8. latithoraz Kéler, from Tinamus solitarius, is a synonym of 8S. wernecki, the latter 
having priority over the former by a year. 
