186 CLASS INSECTA. 



be tolerably large, a burning accompanied with pain. M. 

 Leon Dufour has made us acquainted with the organs which 

 secrete this fluid. 



These insects are found, and often assembled in societies, 

 at least in the spring, under stones. They employ the 

 above-mentioned means of defence against their enemies, and 

 are able to reiterate the explosion a good number of times. 

 The largest species are found between the tropics, and in other 

 warm climates, even as far as the limits of the temperate zone. 



We shall cite 1st, Brachinus displosor, Duf. Aptinxis 

 balista,De'y Hist. Nat. des Coleop. d'Eur, II. viii. 1. It is 

 from five to eight lines in length, black, with the corslet 

 fawn-colour, and the elytra furrowed. In Navarre, and 

 different countries of Spain and Portugal. 



Aptimts Pyrenceiis, Dej. Hist. Nat. des Coleop. d'Eur, 

 II. viii. 3. It is from three to four lines in length, of a deep 

 black, with the antennae, and palpi fawn-colour, and the feet 

 of a reddish yellow. The elytra are furrowed. It has been 

 discovered in the department of the eastern Pyrenees, by 

 M. le Comte Dejean. 



Brachinus^ "Web. Fab., 



Diff'er little from the aptini, but in being provided with 

 wings, and that the emargination of the chin presents no 

 tooth. 



Some, and generally the largest, and for the most part 

 exotic, have the elytra very distinctly furrowed, or with 

 sides, and of this number is a species of the Antilles and 

 Cayenne. 



Brachinus complanatus, Yah. Carabus planus, Oliv. III. 

 vi. 63. Its body is six or eight Tines in length, of a reddish 

 yellow, with black elytra, and presenting a humeral point, 

 a sinuous band, traversing their middle, and a spot at their 

 extremity of the colour of the body. It is also that of their 



