186 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
concerning the characters that separate the species belonging to it. 
In view of this information it has seemed advisable to give the race 
parvigenitalis full specific rank, as well as the subspecies M. multi- 
plex secundus Clay. The host of this species was wrongly identified. 
It should be Crypturellus garleppt affinis, 
MEGAPEOSTUS MULTIPLEX MULTIPLEX Clay 
FIGURES 21, e-h; 22, a 
Megapeosius multiplex multiplex CLay, Proc. Zool. Soc. London, ser. B, 1937, 
p. 150, figs. 9c, 10a, pl. 3, fig. 2. (Host: Crypturellus 6b. boucardi, 
Nicaragua.) 
The original description and figures given by Miss Clay for 
this and the following species are not very complete and have been 
supplemented by further remarks and additional figures. 
A series of 38 adults of both sexes was taken on four individuals 
of the type host, collected by the author on Cerro Tuxtla, Veracruz, 
Mexico, in March 1940. 
The male of M. multiplex is very similiar in general appearance 
to the male of UY. parvigenitalis, with which it agrees in the absence 
of hooks on the posterior margin of the metathorax, shape of the 
head, and in having four deeply pigmented, internal projections from 
the narrow clypeal band, on the front of the head, instead of two, 
as In asymmetricus. 
In the male the body measurements are all slightly less than in 
parvigenttalis, with the single exception of the width of the abdomen, 
which is greater. However, the genital armature is quite different. 
The basal plate is larger than in parvigenitalis; the paramers are 
equal in length, but both are bent to the right, apically, and are 
very unequal in shape (see fig.) ; the endomeral plate with attached 
penis (?) resembles somewhat that of parvigenitalis, except that it 
is much longer and tapers to a narrow, bifurcated tip, each bifurca- 
tion being clearly tubular in character. In addition, there is a long, 
slender hook attached at each side of the basal plate, outside of 
the paramers, which curves inward and backward under the paramers. 
These hooks are also asymmetrical. 
The female differs from that of parvigenitalis in having the 
temples longer, narrower, and more pointed (like the female of 
asymmetricus), but the head is narrower (proportionately) across 
the temples than either of these two species, and the temples are 
less divergent. As to size, the female of multeplexw presents a most 
unusual situation. It is not only much smaller than the female of 
parvigenttalis but is also smaller than its own male sex, in every 
measurement. The last abdominal segment is also differently shaped 
from either of the described species (asymmetricus and parvi- 
genitalts). 
