. Introduction to zoology; a guide to the study of animals, for the use of secondary schools;. , produced by PenipJiif/ii* rorniitdarhifi. 5. Solid gallsou the cortex of Dnvana lonyifolifi, produced by Cecidoxes eremite (Hemip-tera) . (>. Longitudinal section of one of these galls. 7. Capsule galls on theleaf of the turkey oak (Quercus cerris, Hemiptera), produced by Cecidomyiacerri*. 8. One of these galls cut through, with the operculum still firmlyattached. 9. The same, with the operculum falling away ; X 3. The remain-ing figures natural size. From Kerner, Pflanzen Leben. THE FLY AND ITS
. Introduction to zoology; a guide to the study of animals, for the use of secondary schools;. , produced by PenipJiif/ii* rorniitdarhifi. 5. Solid gallsou the cortex of Dnvana lonyifolifi, produced by Cecidoxes eremite (Hemip-tera) . (>. Longitudinal section of one of these galls. 7. Capsule galls on theleaf of the turkey oak (Quercus cerris, Hemiptera), produced by Cecidomyiacerri*. 8. One of these galls cut through, with the operculum still firmlyattached. 9. The same, with the operculum falling away ; X 3. The remain-ing figures natural size. From Kerner, Pflanzen Leben. THE FLY AND ITS ALLIES 69. because it infests wheat seedlings and so weakens them that they produce no grain. Other minute gnats or midges are destructive to clover in the United States, either by binding the leaves together and sucking the sap of the plant or by destroying the young seed. The mosquitoes, or Culicidse,1 are so well known that it is hardly necessary to describe them. They can always be F - identified by the feathery an-tennae, by the presence of a fringe of hairs on the hind margin of the wing, and by the fact that the marginal vein runs all around the periphery of the wing. The larvae areusually aquatic, but somespecies which are abun-dant on our Western aridplains must breed in theearth. The eggs of theaquatic species are laid ina boat-shaped mass, whichfloats on the surface of the — Cecidomyia, the Hessian-fly. <i, larva; b, pupa. Fromthe • Standard Natural History.
Size: 1603px × 1559px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1900
