PROC. BIOL. SOC. WASH. 98(2), 1985, pp. 391^02 A REVIEW OF CUMMINGSIA FERRIS (MALLOPHAGA: TRIMENOPONIDAE), WITH A DESCRIPTION OF TWO NEW SPECIES Robert M. Timm and Roger D. Price Abstract.— Descriptions and illustrations are given for the four previously rec-ognized species of Cummingsia: C inopinata Mendez, C. intermedia Werneck, C. maculata Ferris, and C peramydis Ferris; and for two new species: C. albujai from Caenolestes fuliginosus (Tomes) and C perezi from Caenolestes convelatus Anthony, both from Ecuador. A key is provided for the identification of these six species. Acanthomenopon Harrison is recognized as a subgenus to contain a single species, C. peramydis, parasitic on the marsupial genus Monodelphis. The sub-genus Cummingsia contains the other five species which are parasitic on the marsupial genera Caenolestes, Lestoros, and Marmosa, and the rodent genus Thomasomys. For nearly half a century, the mallophagan genus Cummingsia Ferris (Trimen-oponidae) was known by only three sepcies distributed on South American mar-supials: C. intermedia Werneck, 1937, from Marmosa dry as Thomas and Mar-mosa incana (Lund); C. maculata Ferris, 1922, from Lestoros inca (Thomas); and C. peramydis Ferris, 1922, from Monodelphis brevicaudata (Erxleben) and Mono-delphis domestica (Wagner). In 1971 Mendez described a fourth species, C. ino-pinata, from a rodent, Thomasomys cinereiventer J. A. Allen. We recently collected two new species of Cummingsia from two other South American marsupials, Caenolestes convelatus Anthony and Caenolestes fuligi-nosus (Tomes). The collections are of interest in that these two species of Cum-mingsia represent the first records of Mallophaga on hosts in the genus Caenolestes. Description of these two new species has prompted us to review the entire genus Cummingsia and to provide a key for the identification of all six species. The genus Cummingsia appears to be restricted to the New World marsupials and the rodent genus Thomasomys. We now recognize two subgenera, the nominate sub-genus containing five species and Acanthomenopon Harrison containing a single species. Genus Cummingsia Ferris Cummingsia Ferris, 25 Apr 1922:83. Type-species. — C maculata Ferris. Acanthomenopon Harrison, 17 May 1922:156. Type-species.— A. horridum Harrison. Remarks.— Ferris (1922:83) characterized the genus Cummingsia as follows: "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
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