96 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
Unfortunately no male was taken, but the characters shown by the 
female, although not strikingly different, seem to be of subspecific 
value. 
The measurements are considerably greater in all respects, while the 
cephalic index remains the same; the head is wider at the base of the 
trabeculae and at the frons (in proportion to the width at the temples) ; 
the sides of the prothorax and the occipital margin of the head are 
more emarginate; the tergal plates are wider, being but slightly 
separated medially, while in ¢aoz they are separated by a hyaline 
space two-thirds the width of the paratergal plates; the paratergals 
are much narrower (half the width); the last abdominal segment is 
much wider at its anterior end, with sides more converging, while the 
chaetotaxy of this segment is some different. 
MEASUREMENTS OF TWO RACES OF PSEUDOLIPEURUS TAOI 
taoi (females) peruvianus (female) 
Structure a 
Length Width Length Width 
SOG Fe SURES: ee ACE Dre OANA pom e RDEN On Le  LO SO Osi | eee eee 2.10 
(trabeculae) t-.08 8 eo ee _--0. 27 0. 30 
Teh Ne et pan eee ld MU ACAD WP RNIN i Uh Caiudan 0. 38-0. 43 Ose 0. 44 
IPFOthOrax. | Oe RARE NS Loe NINE i see .---0. 18 0. 24-0. 25 0. 22 0. 29 
IP TOrOC NOTA XS AINE SN a Ae 0. 25-0. 28 0. 33-0. 37 0. 32 0. 41 
HAND GOTIIO TA) AS au aL Ur ON Be RTL Ta CVU eat 1. 08-1. 17 0. 37-0. 44 1. 26 0. 49 
ATI Tenn gett Son UN COMA ORE etl Rd A ta MASI 0. 31-0. 32 . ---0. 043 0. 36 0. 045 
PSEUDOLIPEURUS TINAMI TINAMI (Carriker) 
FIGURE 2, e€ 
Lipeurus longipes tinamé CARRIKER, Univ. Nebraska Stud., vol. 3, No. 2, p. 146, pl. 3, 
fig. 3, 1903. (Host: Tinamus robustus=T. major castaneiceps, from Pozo 
Azul, Costa Rica.) 
Esthiopterum tinami (Carriker) HArrison, The genera and species of Mallophaga, 
p. 143, 1916. 
Pseudolipeurus tinami (Carriker) CARRIKER, Lice of the tinamous, p. 69, pl. 2, 
figs. 2, 2a, 1936. 
Numerous males and females were taken on 7inamus major percautus 
collected on Cerro Tuxtla and at Tres Zapotes, Veracruz, Mexico, by 
the author in 1940. : 
The Mexican specimens are very close to the types from Costa Rica, 
but there are certain slight differences as follows: Total length in both 
sexes slightly greater; head of male some longer (0.48 against 0.52) 
but not wider; in the female it is both longer and wider; prothorax 
in both sexes the same length, but slightly narrower; pterothorax al- 
most same in male, larger in female; abdomen longer in both sexes, 
scarcely wider in male but considerably wider in female; the antennae 
