. Bulletin - United States National Museum. Science. 176 BULLETIN 140, UNITED STATES NATIONAL MUSEUM that length; margin crenulated. Lateral lips (fig. 246 g and h) large, thick, with 3 prominent teeth on anterior border, and on the external surface midway is a horizontal row of 3 very small papillae. Dorsal and ventral lips with sharp-edged projecting central prom- inence and 2 lateral rounded unarmed latered lobes. Cuticle forms collar around base of lips. Male size differs in different birds, the average being 8 mm. long by 31G> wide, the maximum 12 mm. long by 350/a wide. Caudal alae sl
. Bulletin - United States National Museum. Science. 176 BULLETIN 140, UNITED STATES NATIONAL MUSEUM that length; margin crenulated. Lateral lips (fig. 246 g and h) large, thick, with 3 prominent teeth on anterior border, and on the external surface midway is a horizontal row of 3 very small papillae. Dorsal and ventral lips with sharp-edged projecting central prom- inence and 2 lateral rounded unarmed latered lobes. Cuticle forms collar around base of lips. Male size differs in different birds, the average being 8 mm. long by 31G> wide, the maximum 12 mm. long by 350/a wide. Caudal alae slightly asymmetrical. Ventral surface of tail (fig. 246a) covered with long rectangular plates arranged longitudinally. Ten pairs of caudal papillae and 1 unpaired papilla on anterior margin of cloacal aperture; 4 pairs are preanal and 6 pairs postanal. Clo- acal aperture about 350/x from posterior end. Spicules Fig. 246.—Habronema incerta. a, Male tail; b, eggs; c, female tail; d. TRANSVERSE SECTION OP ANTERIOR END; e, ANTERIOR END; f, FEMALE, SHOWING POSITION OF VULVA ; g, FRONT VIEW ; h, DORSO-VENTRAL VIEW OF HEAD. AFTER Smith, Fox, and White, 190S Female size varies in different birds, the average being 14 mm. long by 45G> wide, the maximum 20 mm. long by 600/x wide. Anus (fig. 246c) about 200^ from posterior end. Vulva (fig. 246/) difficult to find, described as in the first third of length of body (figure shows it behind the first third, but anterior to the middle of the body). Eggs (fig. 2466) 34 to 42^ long by 16 to 20^ wide. Life history.—Unknown; probably involving insects as interme- diate hosts. Distribution,—North America (United States (Zoological Gardens, Philadelphia, Pennsylvania)). HABRONEMA LEPTOPTERA (Rudolphi. 1819) Seurat. 1914a Synonyms. —Spiroptera leptoptera Rudolphi, 1819; Filaria lep- toptera (Rudolphi, 1819) Schneider, 1866. Hosts.—Primary: Accipiter nisus, Astur nisus, A. palumbarius, Buteo vulgaris, Circus aeruginosus, C. cine
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
