STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 169 
tergals. The head of the female is longer than in minutus, while there 
is but slight trace of the dark band along the temporal margins; seg- 
ments VI and VII of the abdomen are both wider than in &. m. 
minuta, with the latter evenly rounded posteriorly, while the genital 
plate is of different shape. | 
RHYNCOTHURA HETERURA, new species 
FIGURE 18, c, d 
Type.—Male, adult, from Nothoprocta cinerascens, collected by the 
author at Villa Montes, Bolivia, November 6, 1936; in collection of 
author. 
Diagnosis.—This species closely resembles ft. testudo (Clay), from 
Nothura maculosa peruviana, and may prove to be conspecific with 
it, but until actual comparison can be made I prefer to keep it as a 
distinct species. The measurements are exceedingly close, as far as 
given by Clay, but the prothorax is more divergent, with the sides 
concave, while the sides of the mesothorax are shorter and strongly 
rounded (in testudo, according to the microphotograph published, 
the sides of both prothorax and mesothorax are straight). The chae- 
totaxy of the abdomen seems to be about the same. The genital arma- 
ture of heterura certainly is different from that of testudo (according 
to the figure by Clay), while abdominal segment VII is entire, not 
bilobed on the dorsal surface as in testudo. 
The pleural plates are wide and faintly outlined on here inner 
side but clearly fused with the tergites, which are continuous across 
the abdomen, and with both sclerites deeply pigmented. The sternal 
plates are prominent, considerably wider (longitudinally) than the 
tergites, but are rather widely separated from the paratergals, and 
with a sharp, deeply pigmented line bordering their outer edges in 
segments II to VI. 
The shape of the coxae and that of the femora in this species are 
most extraordinary, but it is not possible to tell from the micro- 
photograph of testudo whether or not they are the same in that spe- 
J 
cies. The first and second coxae and femora are especially note- 
worthy, having shapes I have not hitherto seen (see figure). The 
species is represented by 4 males, the female not having been taken. 
Measurements for this species are given mnclan: Rf, subteres, which 
follows. 
RHYNCOTHURA SUBTERES, new species 
Figure 19, a—c 
Types.—Male and female, adults, from Nothoprocta p. pentlandi, 
collected by the author at Incachaca, Bolivia, June 1937; in collec- 
tion of author. 
