INTERNAL ANATOMY OF INSECTS. 113 
small intestine and rectum, and not more than three pairs 
of * fixed or united bile-vessels. In the Predaceous beetles, 
the gullet mostly widens at the base into a considerable 
crop, followed by a gizzard, a shaggy stomach, and two 
pairs of united bile-vessels. The whole alimentary canal 
in these, is never less than double, and sometimes treble 
the length of the body ». In the carnivorous beetles, at 
least the Staphylinidce and Silphidce, there is little or no 
crop, and the gizzard is hidden : in the former, the whole 
length of the intestinal canal is not twice, while in the 
latter it is more than Jour times that of the body b . In 
these also the intermediate portion of the large intestine 
is singularly annulated c . In the Pelalocera the stomach 
is usually longer than all the rest of the intestines to- 
gether, and often convoluted : in the cockchafer the 
whole intestinal canal is nearly five times the length of 
the body, Jour parts of which is occupied by the stomach d . 
In the grub the canal scarcely exceeds the length of the 
animal e . In Lampyris the stomach exhibits a remark- 
able appearance, having on each side a series of spheri- 
co\Jolds or vesicles f . Have these any thing to do with 
the secretion of its phosphoric matter ? Tenebrio has a 
gizzard armed internally with calluses, and a shaggy sto- 
mach, and Blaps does not differ materially ; their entire 
canal is more than twice the length of the body *. In the 
vesicatory beetles (Cantharis, Meloe, &c.) there is no giz- 
zard, and the canal is less than twice the length of the 
body h . Little is known with regard to the alimentary 
canal of the beetles distinguished by a rostrum (Rhynco- 
a Ramdohr Anat. t. ii. iii. xxv. h Ibid. t. m.f. G. t. iv./. 2. t. v./. 1. 
c Ibid.fA.e.f. '.]. d Ibid. 122. <> Ibid. li?3. 
f Bid. t. v./. 4, B. c Ibid. 94. » Ibid. 96—. 
VOL. IV. I 
