. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. ATTACKING THE FRUIT. Ig7 j)arasite^ Porizon conotracheli Riley, is also an Ichneumon fly, with similar habits and of about the same size as the species just referred to. In Fig. 200, a represents the female, and b the male, both magnified. Neither of these parasites has yet appeared in sufficient numbers to act as an efficient check on the increase of the plum curculio. No. 95.—The Plum-gouger. Coccotorus scutellaris (Lee). While this insect has some points of resemblance to the plum curculio, it is
. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. ATTACKING THE FRUIT. Ig7 j)arasite^ Porizon conotracheli Riley, is also an Ichneumon fly, with similar habits and of about the same size as the species just referred to. In Fig. 200, a represents the female, and b the male, both magnified. Neither of these parasites has yet appeared in sufficient numbers to act as an efficient check on the increase of the plum curculio. No. 95.—The Plum-gouger. Coccotorus scutellaris (Lee). While this insect has some points of resemblance to the plum curculio, it is in other respects so different as to be easily distinguished. The beetle, which is shown magnified in Fig. 201, is about five-sixteenths of an inch long, with the thorax and legs of an ochre-yellow color, while the head and wing-cases are brown, with a leaden- Fig}. 201. gray tint, the latter with whitish and black spots scattered irregularly over their surface. The wing-cases are without humps; the snout is somewhat longer than the thorax, and projects forward or downward, but cannot be folded under the breast as in the case of the plum curculio. It appears in spring about the same time as the plum curculio, but, instead of making a crescent-shaped slit in the plum, it bores a round hole like the puncture of a pin. The eggs are deposited in the following manner. With the minute but powerful jaws at the tip of the snout of the female, a hole is made about four-fifths as deep as the snout is long, which is enlarged at the end and gouged out somewhat in the form of a gourd. The egg is placed in the excavation, and pushed down with the snout until it reaches the receptacle prepared for it. After being deposited, it swells from absorp- tion of the surrounding moisture, and within a few days the young larva escapes. On escaping from the egg^ it makes an almost straight course for the kernel of the plum, through the soft shell of which. Please note that these images are extracted
Size: 1540px × 1622px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublisherphila, bookyear1883
