1885.] Entomology. 509 
is capable of producing intense chemical effects, if the smallness 
of the quantity emitted be taken into account. The light also de- 
termines the phosphoresence of sulphate of calcium, after an expo- 
sure of five minutes; and eosine and azotate of uranium are rén- 
dered fluorescent by it. 
The foregoing is taken from an exchange; the first spectro- 
scopic research in firefly light was those of Professor C. A. 
Young, published in this magazine, vol. 11, p. 615, 1870. 
USE OF AN ADHESIVE FLUID IN JUMPING INSECTS.—Dr. Dewitz 
has described the use of a sticky fluid by insects in jumping. A 
Cicada in a closed glass tube is able to jump from the bottom on 
to the cover, and from one vertical side to the other, turning in 
the air; the contingency of having to jump on to vertical sur- 
faces, or the under side of horizontal surfaces, occurs also in Na- 
ture—viz., in the case of stems and leaves, which are, moreover, 
smooth, so that claws are ineffectual to support the insect, and 
sucking-disks would: probably not act with sufficient rapidity. 
Now, the leaping spiders possess a well-developed pedal adhesive 
apparatus, by the aid of which they can remain attached to the 
surfaces on which they alight; the glands which secrete the 
liquid open all over the balls of the feet, and are especially numer- 
ous at their bases. 
EntomotocicaL Notes.—We glean from the Zod/ogical Record 
for 1883, such notes as are of general interest. Klemensiewicz 
publishes detailed observations on the glands of the skin of cater- 
pillars. As the respiration of insects, says Langendorf, depends 
on abdominal movements, it may continue after the removal of 
the head. The number of respirations is increased by heat. 
Tobacco-smoke and chloroform lead to intermittent, but more or 
less rhythmical respiration for a time. The head and prothorax 
may be removed, and the respiration will continue; and if the 
abdomen of a dragon-fly is cut to pieces, respiration will continue 
in them, thus showing that each abdominal segment possesses its 
own respiratory center——Osborne finds that in the Euro 
tra 
and those fed en honeysuckle forming pale-greenish cocoons. In 
this saw-fly parthenogenesis is the rule-——H. Miller states that 
bees in unaccustomed localities are timid, and find honey with 
attractive colors, and bright yellow the least so.——At the sug- 
gestion of Darwin, Fabre undertook a series of experiments to 
