. Un traité sur les insectes nuisibles à la végétation . Les insectes nuisibles. 32 coléoptères. Kg. 11. Il y a une sorte d'PhyUophaga non décrit, ou feuille-eater, appelé, dans mon catalogue des insectes du Massachusetts,* fra- terna, parce qu'il est presque semblable à la quereina, dans l'apparence générale. Il diffère de ce dernier, toutefois, en étant plus petite et plus mince ; les perforations sur son thorax et couvre l'aile ne sont pas si distinctes, et les trois lignes élevées sur cette dernière sont à peine visibles. Il twentieths 13 mesures d'un pouce de longueur. Ce coléoptère peut être vu dans la dernière partie du mois de juin

• Contributeur: The Book Worm / Alamy Banque D'Images
• ID de l’image: RDR8D1
• Taille du fichier: 7,2 MB (156 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 1286 x 1944 px | 21,8 x 32,9 cm | 8,6 x 13 inches | 150dpi

Informations supplémentaires

Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

. A treatise on some of the insects injurious to vegetation . Insect pests. 32 COLEOPTERA. Kg. 11. There is an undescribed kind of PhyUophaga, or leaf-eater, called, in my Catalogue of the Insects of Massachusetts, * fra- terna, because it is nearly akin to the quereina, in general appearance. It differs from the latter, however, in being smaller, and more slender; the punctures on its thorax and wing-covers are not so distinct, and the three elevated lines on the latter are hardly visible. It measures thirteen twentieths of an inch in length. This beetle may be seen in the latter part of June and the beginning of July. Its habits are similar to those of the more abundant May-beetle or dor-bug. Another common PhyUophaga has been described by Knoch and Say, under the name of Mrticula (Fig. 11), meaning a little hairy. It is of a bay- brown color, the punctures on the thorax are larger and more distinct than in the quereina, and on each wing-cover are three longitudinal rows of short, yellowish hairs. It measures about seven tenths of an inch in length. Its time of appearance is in June and July. In some parts of Massachusetts the Phyl- hphaga Greorgieana (Fig. 12) of Gyllenhall, or Georgian leaf-eater, takes the place of the quercina. It is extremely common, during May and June, in Cambridge, where the other species is rarely seen. It is of a bay- brown color, entirely covered on the upper side with very short, yellowish gray hairs, and measures seven tenths of an inch, or more, in length. * In order to save unnecessary repetitions, it may be well to state, that the Catalogue above named, to which frequent reference will be made in the course of this treatise, was drawn up by me, and was published in Professor Hitchcock's Report on the Geology, Mineralogy, Botany, and Zoology of Massachusetts, and that two editions of it appeared with the Report, the first in 1833, and the sec- ond, with numerous additions, in 1835.. Fig. 12.. Please note that these images are extract

Recherche dans la banque de photos par tags

• bookcentury1800
• bookdecade1860
• bookpubl
• booksubjectinsectpests