140 INTERNAL ANATOMY OF INSECTS. 
Ray mentions a locust taken in Spain which emits a yel- 
low oleaginous fluid from between the claws of its fore 
legs a ; but the precise nature of these substances has 
not been ascertained, nor whether they are secreted by 
peculiar organs. 
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 Aci- 
lius sulcatus ; and other insects emit it from other parts 
of their body b . 
vii. Honey. It is certain that honey is not an animal 
secretion ; yet the saccharine matter collected from the 
nectaries of flowers, from which it is derived, seems to 
undergo some alteration in the stomach ; for the con- 
sistence of honey is greater than that of any vegetable 
nectar, 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 c . Now 
if honey Were the unaltered nectar of plants, it is diffi- 
cult to conceive how this cream could be collected in 
proper proportions. The last-mentioned naturalist like- 
wise ascertained, that if bees, in a season in which the 
fields afford a scarcity of food, be supplied with sugar, 
they will from this substance fill their cells with honey 
which differs in no respect from the common sort, ex- 
cept that its flavour is a little heightened d : — a similar 
a Rai. Hist. Ins. 62. » Vol. II. p. 242—. 248. Rai. Hist. 
Ins. 94, 382. * Reaum. v. 448. d Ibid. v. 722. 
