(a2 9 [Ixxxiv 
makes a faint [sound] between a hissing and a squeaking ; 
like the Lamiz.” Dec. 9, 1826. At Rio das Pedras, Cubatad. 
This is by far the earliest record of the possession by these 
beetles of vocal powers, the instruments of which have only 
recently been discovered by Mr. Babb of Massachusetts. 
Mr. Arrow called attention to the remarkable fact that 
the six specimens exhibited, although apparently all found 
at the same time and place and supposed by Burchell to 
be of one species, actually consisted of no less than five 
species of three genera. Dissections were also shown illus- 
trating the means by which the sound is produced in the 
Passalidee. 
Mr. Warernovse further exhibited two Coleopterous larvee 
from the Burchell Collection from Brazil, submitted to him 
for determination by Prof. Poulton. One was a Heteromerous 
larva (numbered 1154) two inches long, much resembling the 
larva of Helops. The more interesting one (numbered 1330) 
was noted by Burchell to be luminous. It was one inch 
in length, subcylindrical, and appeared to be the larva of 
an Elaterid, but the prothorax was unusually large, and the 
head retracted beneath ; the mouth parts, although not those 
of a typical Elater, conformed more to that type than to any 
other with which he was acquainted. 
In connection with Mr. Warernovuse’s exhibits the 
PRESIDENT contributed the following notes :—“1154” is 
attached not only to the larva but also to the Anthribid 
Ptychoderes elongatus,Germ. The note is as follows :—‘‘ 1154. 
Cut out of dead wood but not quite perfected. The long 
cylindric larva of this number was said to be cut from the 
same piece of wood and therefore may be the same insect.” 
Dated Dec. 17, 1826. Locality, Cubatéio; between the 
‘Middle Part” (Dec. 16) and the ‘Upper Part of the 
ascent” (Dec. 22) of “the great range of mountains,” the 
Sierra da Cubatao. 
“1330. Larva of (Lampyris?). Caught in the garden 
crawling on the ground at night, and detected by means of a 
small spot of light at the head; but on being touched it 
instantly emitted a much stronger light from every part or 
joint of the abdomen, which previously was quite dark. The 
light proceeded only from the under part : the back was dark 
