. Economic entomology . Lipeurus variabilis (from the fowl). I to I line in length. Lipeurus squalidus (from the duck). \ to i\ line in length. Lipeurus variabilis {Nitzsch).—45. Speci- mens ; 46. Enlarged figure of ditto; 47. Illus- trative vignette (newly hatched domestic chick- ens). Infests the domestic fowl. Lipeurus squalidus {JSIitzsch). Infests the duck. Nos. 48-50. Nos. 51—53- Lipeurus jejunus {NitzscJi).—48. Specimens; 49. Enlarged figure of ditto ; 50. Illustrative vignette (geese). Infests the goose. Lipeurus polytrapezius {Nitzsch).—51. Specimens ; 62. Enlarged figure of ditto; 63
. Economic entomology . Lipeurus variabilis (from the fowl). I to I line in length. Lipeurus squalidus (from the duck). \ to i\ line in length. Lipeurus variabilis {Nitzsch).—45. Speci- mens ; 46. Enlarged figure of ditto; 47. Illus- trative vignette (newly hatched domestic chick- ens). Infests the domestic fowl. Lipeurus squalidus {JSIitzsch). Infests the duck. Nos. 48-50. Nos. 51—53- Lipeurus jejunus {NitzscJi).—48. Specimens; 49. Enlarged figure of ditto ; 50. Illustrative vignette (geese). Infests the goose. Lipeurus polytrapezius {Nitzsch).—51. Specimens ; 62. Enlarged figure of ditto; 63. Illustrative vignette (teal). Common on the turkey. " Their mode of progression," says Mr. Denny, *' is rather singular as well as rapid. They slide, as it were, sideways, extremely quick from one side of the fibre of a feather to the other, and move equally well in a forward or retro- grade direction, which, together with their flat, polished bodies, renders them extremely difficult to catch or ; He has observed, he also remarks, " that when two or more genera infest one "bird, they have each their separate localities, for while the Goniodes stylifer will be found on the breast and neck of the bird. the Lipeurus polytrapezius will be congregated in numbers on the webs and shafts of the primary wing ; Genus Ornithobius {Denny), Scarcely differing from Nirmus, except in having two horns to the clypeus.
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondonchapmanandha
