1 1G INTERNAL' ANATOMY OF INSECTS. 
sels, like those of the two preceding Orders, are nume- 
rous, short, and free a . In the ants and ichneumons there 
is an approach to a gizzard b . In the wasp and humble- 
bee the stomach is very long, with muscular rings sur- 
rounding it c . In this Order the larva? at first have no 
lower intestines and void no excrement d , but as they ap- 
proach to the pupa state one begins to appear c . 
The next insects whose alimentary canal we are to 
consider, are those which, taking their food by suction, 
have no occasion for masticating organs : this may in 
part be predicated of the preceding Order, in which 
most of the tribes in their perfect state imbibe fluid food, 
and use the ordinary organs of mastication principally in 
operations connected with their economy ; and their crop, 
in which the honey in many is stored up for regurgita- 
tion, ma)' be regarded in some degree as analogous to the 
food-bag of the Diptcra and other suctorious insects. 
The two sections of the Hcmiptcra Order differ widely 
in the canal we are considering, and I shall therefore 
give a separate account of each. In the Hetcroptcrous 
section, appended to the gullet by a long convoluted ca- 
pillary tube, besides the usual saliva-reservoirs there is 
often a double vessel, which Ramdohr regards as dis- 
charging the same function, but which in many respects 
seems rather analogous to the food-reservoir of the Di- 
ptera f . As I have had no opportunity of examining this 
vessel, I shall content myself with stating this idea, and 
describe the vessel more fully hereafter. The gullet, in 
' Ramdohr t. xii./. 6. H. t. xiii./. 1./. 
b Ibid. t. xiv. f. 2, 3, C. c Ibid. t. xii./. G. D. t. xiii./. \.b. 
" Ibid. 133. t. xii./. 1—3. ' Ibid.f. 4. 
f Comp. Ramdohr t. xxii. /. 3. M. Fig. 4. 3. with t. xxi./ 1. /. 
