412 



Insects which attack the Raspberry. 



the top, the remainder 

 not being full-sized, 

 and generally pre- 

 maturely ripe and dis- 

 coloured. This is done 

 by a whitish grub, of 

 about a quarter of an 

 inch long, and rather 

 cylindric in figure ; 

 with the under side 

 of the body and sides, 

 and articulations of 

 the segments, dirty 

 white ; the head and 

 a dorsal plate on each 

 ring brownish buff, 

 with the sides and a 

 central longitudinal 

 line on each plate 

 brown, thus giving 

 the appearance of 

 three dorsal lines of 

 brown. The head is 

 horny, and furnished 

 with horny jaws and 

 short feelers, as well 

 as with the various 



membranous parts usually present, composing the under portions 

 of the mouth of the larvas of Coleoptera. The grub is also 

 furnished with six short scaly articulated feet. It has also two 

 short scaly horns on the upper side of the extremity of the 

 body ; the under side being furnished with a fleshy retractile 

 tubercle, which the insect uses as a seventh foot. When full 

 grown it descends to the earth, where it buries itself to a con- 

 siderable depth, forming for itself a small oval cocoon of earth, 

 with the inner surface quite smooth. Here it assumes the 

 ordinary pupa state to which all coleopterous insects are sub- 

 ject. Some individuals which I reared did not arrive at the 

 perfect state till the following spring, when they produced the 

 Byturus tomentosus, a small buff or slaty brown coloured oval 

 beetle, with knobbed antennae, which is to be seen flying about 

 the raspberry plants in the spring and summer, and which is 

 also very partial to the hawthorn and blackberry. 



I am the more desirous of stating the result of my own ob- 

 servations, because Mr. Curtis, in his account of this beetle, 

 appears to be in some doubt whether the maggots found in the 

 fruit of the raspberry are those of this insect ; whilst Messrs. 



Fig !)8. The Raspberry Beetle, 

 a. Full-grown raspberry, b. Raspberry attacked by the larva, and 

 not arrived at the full growth ; many of the seed-cells dried up. 

 c, The same opened, to show the larva on the core, into which it 

 burrows, d. The larva, e. The perfect insect flying, of the 

 natural size. 



