134 INTERNAL ANATOMY OF INSECTS. 
mentions a locust taken in Spain which emits a yellow 
oleaginous fluid from between the claws of its fore legs*; 
but the precise nature of these substances has not been 
ascertained, nor whether they are secreted by peculiar 
organs. i 
vi. Milk. A milky fluid is produced by the larva of 
Chrysomela Populi. Willughby observed a similar effu- 
sion from pores in the upper surface of the body of Acz- 
dius cinereus; and other insects emit it from other parts 
of their body”. : 
vii. Honey. It is certain that honey is not an animal 
secretion; yet the saccharine matter cojlected from the 
nectaries of flowers, from which it is derived, seems to 
undergo some alteration in the stomach ; for the consist- 
ence of honey is greater than that of any vegetable nec- 
tar, and its taste does not vary greatly, while that of the 
nectar in different plants is probably not the same. 
Reaumur also has observed, that each honey-cell in a 
bee-hive is always covered by a cream-like layer of a 
thicker consistence than the rest, which apparently serves 
to prevent the more liquid honey, which from time to 
time is introduced under it, from running out*. Now 
if honey were the unaltered nectar of plants, it is difficult 
to conceive how this cream could be collected in proper 
proportions. The last-mentioned naturalist likewise as- 
certained, that if bees, in a season in which the fields af- 
ford a scarcity of food, be supplied with sugar, they will 
from this substance fill their cells with honey which dif- 
fers in po respect from the common sort, except that its 
flavour is a little heightened‘ :—a similar argument may 
@ Rai. Hist. Ins. 62. * Vou. TI. p. 245, 251. Rai. Hist. 
Ins. 94, 382. © Reaum. y. 448, * bid. v.97 22: 
