PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM issued aK'Ask S G?^n ^y '^' SMITHSONIAN INSTITUTION U. S. NATIONAL MUSEUM Vol. 100 Washington: 1949 No. 3266 SOME BIRD LICE OF THE GENERA ACIDOPROCTUS AND QUADRACEPS (NEOTROPICAL MALLOPHAGA MISCEL-LANY NO. 3) By M. A. Carriker, Jr. Opportunity is here taken to restiidy the Old World mallophagan species Acidoproctus rostratus (Riidow) and Quadraceps annul atus (Denny), with reference to certain species from Colombia, and to de-scribe two new species from South America. Thanks are extended to Dr. G. H. E. Hopkins for his cooperation in supplying the Old World material. All measurements are in millimetei's. Genus ACIDOPROCTUS Piaget ACIDOPROCTUS ROSTRATUS (Rudow) Figure 44, a-c Ontithobius vostmHis Rudow, Zeitscbr. fiir gesamruten Naturw., vol. 27, i>. 465, 18G6. (Host: Chenalopex [=Alopoc}ien] argypticus = Dendrocyyna viduata fide Hopkins.) Dr. Hopkins, in a recent letter to me, says of this species : "The type being lost, somebody should erect neotypes. I dealt with this species in a previous paper (Ann. Mag. Nat. Hist., ser. 11, vol. 2, p. 195, 1938) , and I regard Dendrocygna viduata as the type host, though that is anybody's guess, because the type was a nymph and it would cer-tainly have been impossible to say from what species of Dendrocygna it got onto the goose (skin ?)." If the type of A. rostratiis was collected on a skin of Alopochen aegypticus^ as Hopkins suggests, it must have certainly straggled there 377 854562—50
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