138 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
The elongated-oval, thin flaps at each side are unquestionably the 
paramers and are almost unpigmented except toward the thickened 
basal portion. ‘The endomeral plates are clearly connected basally, 
and apparently near the tips, and may be covered by a membrane both 
above and below, thus forming a kind of tube, although there is not 
a great deal of visible evidence to corroborate this theory. The ir- 
regular outline of the endomeres is also a most unusual character. 
There is nothing unusual about the abdominal structure, other than 
the apical segment in the female, which is figured. The chaetotaxy is 
very similiar to that of brevitemporalis, as is also the shape of the last 
abdominal segment in the male. The number of teeth given for the 
abdominal combs was taken from the types and does not represent 
the average. 
RHOPALOCERAS HETEROGENITALIS SPATULATA, new subspecies 
Ficure 10, ec, f 
Types.—Male and female, adults, from Crypturellus idoneus, col- 
lected by the author at El Bosque, Sierra Perija, Colombia, June 14, 
1941; in U.S. National Museum. 
Diagnosis.—V ery closely related in all respects to A. h. heterogen- 
etalis, from the Mexican host Crypturellus b. boucardi. The head, 
with the exception of the male antennae, is practically the same shape 
as in heterogenitalis, but a trifle smaller in the male and larger in the 
female; the antenna is longer in the male and shorter in the female, 
and with fewer hairs in the male; the prothorax is the same size in the 
male, the mesothorax longer, but the same width, while the metathorax 
is both shorter and narrower (these measurements for length are the 
exposed lateral margins). There are also discrepancies in the size and 
proportions of the thoracic segments in the female (see table of 
measurements). 
The paramers are much longer but very little wider (0.13 by 0.053 
against 0.097 by 0.04); the endomeres are about the same length but 
more than twice the width; the mesothoracic sternal plate is of a de- 
cidedly different shape and chaetotaxy (see figure). The number 
of teeth in the abdominal combs is also very variable, as in hetero- 
genitalis, although they average nearly the same. The presence of 
heterogemtalis on C’. b. boucardi and of a closely related subspecies of 
it on C. idoneus seems to be rather conclusive proof that C. zdoneus 
may be conspecific with C. boucardi, and not C. cinnamomeus, as given 
by Peters. 
