364 
INSECTA. 
ring' is square, and does not ijroject from the body. There are no 
mamniillce on the eightli ; and the last is terminated by two conical 
appendages, exclusive of a membranous tube formed by the prolon- 
gation of that part of the body which contains the anus. These 
appendages, in the larvae of Calosoma and Carabus, are horny and 
dentated. In those of Harpalus and Licinus, they are fleshy, arti- 
culated and longer. The body of the larva of a Harpalus is some- 
what shorter, and the head a little larger. The mandibles of both 
approach the form of those of the perfect Insect. The larva of the 
Omophron horde, according to the observations of Desmarest, has a 
conical form, a large head, with two very stout mandibles, and but 
two eyes ; the posterior extremity of the body, which is somewhat 
narrowed, terminates by a quadri-articulated appendage. I could find 
but two in that of the larvae of Licinus and Harpalus. 
In this family, we always observe a first, short and fleshy stomach ; 
a second, elongated, and, from the number of small vessels Avith which 
it is coAmred externally, apparently hairy; and a short and slender 
intestine. The hepatic vessels, four in number, are inserted near the 
pylorus. 
Some are aquatic, others terrestrial. 
The latter have legs exclusively adapted for running, the four pos- 
terior of Avliich are inserted at equal distances ; mandibles completely 
exposed; the terminal piece of the maxillee straight interiorly, and 
only curved at its extremity ; and most frequently an oblong body 
Avith projecting eyes. All their tracheae are tubular or elastic. Their 
intestine terminates in a Avidened cloaca, furnished Avith tAVO small 
sacs, Avhich separate an acrid humour*. 
* M. Leon Bufour, Ann. des Sc. Nat., Till, p. 36, gives the following resumd of 
the anatomical characters of the Insects of this division : — 
“ The Carahici are hunters and carnivorous. The length of their alimentary canal 
is not more than twice that of the body. The oesophagus is short ; it is followed by 
a musculo-membranor\s, very dilatable, well-developed crop ; then comes an oval or 
rounded gizzard Avith cellular and elastic parietes, armed internally Avith moveable 
horny appendages fitted for grinding, and furnished Avith a valve at each orifice. The 
chilijic ventricle Avbich succeeds to it is of a soft expansile texture, always studded 
with larger or smaller papilla;, and narrowed behind. The small intestine is short. 
The ccEcuni has the form of a crop. The rectum is short in both sexes. The hepatic 
vessels, but tAvo in number, describe various arcs in their flexures, and are implanted 
by four separate insertions, around the termination of the chylific ventricle. The 
testes are (each formed by the agglomerated circumvolutions of a single spermatic ves- 
sel, sometimes almost naked, and at others invested by an adipose layer, a sort of 
tunica vaginalis. The vasu deferenlia are often folded into an epididymus. The vesi- 
culcB seminales, only two in number, are filiform. The ductus jaculans is short, the 
penis slender and elongated, and the copidating armature more or less complicated. 
The ovaries have but from seven to twelve ovigerous sheaths to each, multilocular, 
and united in a single conoid fasciculus. The oviduct is short. The sebaceous gland 
is composed of a secreting vessel, sometimes filiform, and at others enlarged at the 
