1970] 
Peck — Ccitopinae 
241 
1. El Yunque and vicinity, 16-17 July 1958, M. W. Sanderson, 
beating and sweeping, i( Illinois Natural History Survey collection). 
Ecology. Most of the cave collections were from bat guano, found 
in association with their larvae, and not far from the cave entrance. 
It would seem that the lowland cave populations may now be at 
least partially isolated from the montane forest populations since 
the clearing and destruction of much of the lowland forest for agri- 
cultural purposes. I visited Cueva de los Alfaros where Sanderson 
found the beetles abundant, and found none. The Cerro Dona 
Juana forest collections were from traps in moist closed-canopy 
forest with a good ground cover of herbaceous plants. Floor litter 
was abundant at higher elevations. The beetles are more abundant 
in the Cerro Dona Juana forest. Four carrion and one yeast baited 
trap in the Cerro Dona Juana forest caught 13 beetles, compared 
with 3 beetles from 6 carrion and 3 yeast traps in the Luquillo 
forest. A possible explanation for the lower catch in the montane 
Luquillo rain forest is that it may be too wet. 
Proptomaphaginus darlingtoni (Jeannel), new combination 
Figs. 2, 3. 
Ptomaphagus ( Adelops ) darlingtoni Jeannel 1936: 92. 
Type: 1 male (MCZ number 22521). Cuba, Cienfuegos, Sole- 
dad, x.28.1926, Darlington. “Wash, gravel bar small brook in 
woods”. 
Examination and dissection of the type show it to be a male (not 
a female as Jeannel stated, because of the narrow pro-tarsomeres, 
a female character in other Catopinae), and to have an aedeagus 
very similar to P. apodemus. 
The similarity of the two species is very striking. The only 
available characters to separate them are the smaller size of dar- 
lingtoni (1.6 mm) compared to apodemus (2.0-2. 2 mm), and a few 
minor details of the aedeagus. The aedeagus of darlingtoni is 
smaller and has a greater constriction at the base of the lateral 
lobes (arrow in fig. 2), than apodemus (fig. 4), the aedeagus tip 
is broad in darlingtoni between the lateral lobes and narrow in 
apodemus so that a space shows along the lobes in their interior 
side (arrow in fig. 4). 
There is a possibility that darlingtoni and apodemus are con- 
specific. Only further collecting will show if the differences are 
distinct between populations, or only extremes of variation within 
populations. The two localities are 130 km from each other, and 
on opposite sides of the Island. 
