— 138 — 
country, therefore I have the less hesitation in bringing before you 
the somewhat imperfect analysis here detailed in the hope that 
others more fortunately situated may be induced to repeat the 
experiments on a larger scale, as doubtless the part played by this 
discharge, which must be of an exhaustive nature to the Beetle, 
derived as it is either from the salivary glands or the crop, may be 
thereby better understood. The secretion is poured forth, not from 
the joints or neck as in oil Beetles, but from between the jaws as in 
Carabide. 
Some work of this nature has I believe been done on the Conti- 
nent many years ago, but unfortunately I have been unable either 
to procure a copy or find the name of its author, and I must there- 
fore apologise if the work done here has been previously published 
abroad. 
Mr. C. Lovarr Evans’ Report. 
Methods. — The Beetles, irritated by handling, yielded their 
secretion at intervals in droplets which were collected as soon as 
exuded in a fine capillary tube applied to them, and thence 
transferred by blowing into a larger one. The total amount 
obtained was, however, small, amounting only to a 
few cubic centimetres, and the tests necessary for its 
analysis had to be carried out on a very small scale, 
and for this on many occasions the following device 
was used : 
A piece of apparatus shown in the accompanying 
sketch was made, consisting of two superimposed per- 
forated glass bulbs of small size surmounted by a 
sucking tube partially blocked immediately above the 
upper bulb, to prevent splashing. The lower bulb com- 
municated with a long capillary tube into which a 
certain amount of the secretion could be aspirated, 
followed by the reagent to be used, their mixing 
occurring in bulb (6); when well mixed, the contents 
of (à) were blown back again into the capillary tube (a), 
| and examined there for turbidity, etc., with the naked 
| eye and under the microscope. 
nos To filter off such precipitates the following device 
was had recourse to : A piece of glass tubing of small 
calibre was drawn out at one end into a capillary tube as indicated 


