198 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
The differences in body measurements between meaicanus and aber- 
rans are no more than could be covered by individual variation, ex- 
cept the width of the head at temples in the female, which is less 
(0.07 mm.), and in the size of the genitalia of both sexes, those of the 
male being considerably larger, and of the female narrower and 
differently shaped. 
The tergal plate of segment VI in the female is continuous, as in 
aberrans, not broken medially as in taot. The scent glands in the 
male are located on the fifth segment, at the inner, posterior edge of 
the pleurite. ‘They are globular in shape, with a short tubular outlet, 
as in aberrans. 
PTEROCOTES ABERRANS COLOMBIANUS, new subspecies 
FIGURE 24, d 
Types.—Male and female, adults, from Tinamus serratus ruficeps, 
collected by the author at El Bosque, Sierra Perij4, Colombia, June 14, 
1941; in U.S. National Museum. 
Diagnosis —The male of this race is very close to P. taoz in size of 
body segments, but the antennae and genitalia differ considerably. 
The antennae are longer (0.40 against 0.326) ; the basal plate longer 
and wider (0.37 by 0.17 against 0.26 by 0.15) ; the paramers are longer 
(0.26 against 0.16) ; and the endomeral plate and penis are twice as 
long and some wider (0.25 by 0.045 against 0.12 by 0.038). The para- 
mers are straighter and slenderer than in’ aberrans and especially 
mexicanus (like taoi) and have the tips slightly enlarged but not 
bluntly pointed. The seventh abdominal segment, as well as the 
sternal genital plate, is very similar to meaxicanus. 
The female differs considerably from that of ¢aoz in body measure- 
ments and is also much smaller than either aberrans or mexicanus; 
the head is longer at the temples and wider at both frons and temples; 
all three thoracic segments are both longer and wider; the antennae 
are shorter, while the genital apparatus is both shorter and narrower. 
The female genital apparatus resembles that of mexicanus rather 
than aberrans, but there is very little difference between all the races 
of aberrans in the chaetotaxy of this organ. However, in tao? the hairs 
are somewhat shorter and considerably finer, but a// forms have the 
two pairs of curving spines at the tip of the ventral lp (the 1936 
published figure of aberrans is incorrect in this respect). 
In aberrans the tip of the abdomen is more rounded than in the other 
races, while in ¢aoz it is most acuminate, mexicanus and colombianus 
being intermediate and similar. The temples in the female of colom- 
bianus are the most acuminate, and those of aberrans the least (the 1936 
figure is also incorrect in this detail). 
