G. F. Ferris 
83 
and sternal plates strongly developed on all the segments except on the first 
sternite. The tergal plates bear a single transverse row of four or six setae 
while the sternal plates for the most part bear one row of large setae and an 
irregular row of much smaller setae. 
The genital region (Fig. 3 c) bears a cluster of setae near each lateral margin. 
Male. Length 1 mm. In general form and structure closely resembling 
the female. The genitalia (Fig. 4 d) are very simple. The basal plate is com¬ 
posed of a pair of long, slender rods, united at the anterior extremity in the 
form of an inverted V. At the tip of each of these rods is a short piece ter¬ 
minating in a hook, these probably representing the parameres, and between 
the tips of the rods are a pair of flattened, pointed pieces of doubtful homology. 
Genus Cummingsia nov. 
Mallophaga of the family Trimenoponidae ; with the lateral margin of the 
head at the most but slightly notched; with two pairs of strong, flattened, 
backward-pointing spines on the ventral side of the head, these arising from 
just before the bases of the antennae; with the clypeal region not delimited 
dorsally by a transverse suture; with the antennal fossae not covered beneath 
by a flap; with the mesonotum quite distinct; without pulvilli on the first 
segment of the tarsi; with the genitalia of the males of a simple type. 
Type of the Genus. Cummingsia maculata n.sp. One other species, 
C. peramydis n.sp., is included. 
Notes. It is with some hesitation that I refer the two species above named 
to the same genus, for in the structure of the head there is a rather notable 
difference. I would especially call attention to the apparent absence of the 
maxillary lobes in C. peramydis. However, they are not so different that their 
association in the same genus is entirely incongruous and in some respects 
they are very similar. 
I am naming this genus in honour of the late Bruce Cummings, by s whom 
Trimenopon , the type-genus of this family was established. 
Cummingsia maculata n.sp. 
Figs. 2 e, 3 d, 4 e, 7. 
Specimens Examined. One female, the holotype, and three males from 
Caenolestes sp., Cedrobamba Ruins, Peru. The specimens are from a skin in 
the United States National Museum and a paratype of the species will be 
deposited in the collections of that institution. The host is a marsupial. 
Female (Fig. 7). Length 1-2 mm. Head somewhat wider than long, nearly 
truncate anteriorly and with a slight notch in the lateral margin. Clypeal 
region very small, bounded dorsally by an elongate, heavily chitinised area 
on each side that extends nearly to the middle of the head. Beyond this area 
is a smaller area at the anterior lateral angle which extends to the ventral 
side and from which rises the pair of flattened spines. The wall of the antennal 
fossa is heavily chitinised. The maxillary palpi are very short and stout. 
(i—2 
