A NEW SPECIES, AND NOTES ON A PREVIOUSLY DESCRIBED SPECIES, OF AUSTROMENOPON BEDFORD, 1939 (MALLOPHAGA: AMBLYCERA) FROM ALCIDS (AVES: CHARADRIIFORMES) Eldon S. Eveleigh and William Threlfall Department of Biology, Memorial University of Newfoundland, St. John's Newfoundland ABSTRACT — Austromenopon phippsi n. sp. from Uria lomvia ( L. ) and Austromenopon nigropleurtmi (Denny) from Fratercuhi arctica (L. ) and Platitus alle (L. ) collected in Newfoundland, Canada are described and illustrated. Timmermann ( 1954 ) described several new species of Austro-menopon Bedford, 1939 from charadriiform birds, including some from auks (Alcidae), utilising size of the organisms and shape of the male genitalia as his main diagnostic criteria. The same author (Timmermann, 1957) reviewed the mallophagan parasites, including the genus Austromenopon, of members of the order Chadriiformes ( Aves ) . Clay ( 1959 ) erected a key to the known species of this amblyceran genus parasitic on this order of birds. During the course of a study of the ectoparasites of alcids (auks) in Newfoundland a new species of Austromenopon was recovered from Uria lomvia (L.), its description being given below. Austromenopon nigropleurum (Denny, 1842) recovered from Fraterciila arctica (L.) and Plautus alle (L.) is redescribed and illustrated. All measurements are given in microns (/xm). Holotype and allotype locality indicated by an asterisk ( * ) in the text. Austro77ienopon pliippsi Eveleigh and Threlfall, new species Fig. 1, 2a Host: Uria lomvia (Linnaeus) Location: Mainly on breast (85 percent) Locality: *Hillgrade, New World Island, Notre Dame Bay (49°32'N, 54°47'W); Green Island, Witless Bay (47°15'N, 52°47'W). Description: Number examined 47 (26 female, 21 male. Holotype female (USNM #72915), allotype male (USNM #72916). External morphology and chaetotaxy of female as shown in fig. 1. Shape of male genitalia detailed in fig. 2a. Measurements of holotype, allotype and paratypes are given in Table 1. Discussion: Austromenopon phippsi n. sp. belongs to the nigro-pleurum group as noted in Clay (1959). The nearest apparent relative of this species is A. uriae Timmermann, 1954, but differs from the latter species, which was only very briefly and inadequately described, in the size and shape of the male genitalia (fig. 2a, 2c) . The parameres are relatively much larger, straighter and stouter than in A. uriae 270
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