268 INSECT A. 



the body, which is somewhat narrowed, terminates by a qua- 

 driarticulated 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 with which it is covered 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 posterior of which are inserted at equal distances ; man- 

 dibles completely exposed; the terminal piece of the max- 

 illae straight inferiorly, and only curved at its extremity ; and 

 most frequently an oblong body with projecting eyes. All 

 their tracheae are tubular or elastic. Their intestine termi- 

 nates in a widened cloaca, furnished with two small sacs, which 

 separate an acrid humour(] ). 



(1) M. Leon Dufour, Ann. des Sc. Nat, VIII, p. 36, gives the following resume 

 of the anatomical characters of the Insects of this division: 



" The Carabici 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 fol- 

 lowed by a musculo-membranous, very dilatable, well developed crop; then comes 

 an oval or rounded gizzard with cellular and elastic parietes, armed internally with 

 movable horny appendages fitted for grinding, and furnished with a valve at each 

 orifice.* The chilific ventricle which succeeds to it is of a soft expansile texture, al- 

 ways studded with larger or smaller papilla:, and narrowed behind. The small intes- 

 tine is short. The caecum has the form of a crop. The rectum is short in both sexes. 

 The hepatic vessels, but two 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 vessel, sometimes almost naked, and at others invested by an adi- 

 pose layer, a sort of tunica vaginalis. The vasa deferentia are often folded into an 

 epididymus. The vesiculae seminales, only two in number, are filiform. The ductus 

 jaculans is short, the penis slender and elongated, and the copulating 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 ovi- 

 duct is short. The sebaceous gland is composed of a secreting vessel, sometimes 

 filiform, and at others enlarged at the extremity, and of a reservoir. The vulva is 

 provided with two retractile hooks. The ova form oblong ovals. The presence 

 of a secreting excremental apparatus is one of the most striking characters in the' 

 anatomy of all the Carabici. It consists of one or several clusters of secretory utri- 

 culi, the forrri of which varies according to the genus; of a long vas effer ens,- of a 



