252 INSECTS. COLEOPTERA. 



Gen. REMBUS, DICOELUS, LICINUS, BADISTER. 

 Head with a strangulation, or abruptly depressed at its origin. 



Gen. PATROBUS, MICROCEPHALA, PELECIAS, PANAGCEUS, LORICERA TRI- 



CHOGWATHA. 



2. Internal side of the two anterior legs without notch, or with one, but in the form 

 of an oblique linear canal, and not advancing on the anterior face of the leg. 

 Abdominales. 



A. Internal side of the mandibles entirely, or almost entirely, dentated in their whole 

 length. 



Gen, PAMBORUS, CYCHRUS, SCAPHINOTUS. 



B. Mandibles without distinct teeth, or with them only at the base. 



a. All the tarsi alike in both sexes. 



Gen. TEFFLUS, PROCERUS. 



b. Anterior tarsi dilated in the males. 

 * Labrum bilobed or trilobed. 



Gen. PROCRUSTES, CARABUS, CALOSOMA. 

 "* Labrum entire. 



Gen. LEISTUS (Pogonophonts) ; NEBRIA, OMOPHROX, BLETHISUS, ELA- 



PHRUS, NOTIOPHILUS. 



II. Exterior palpi subulate at the end. 



Subulipalpi. 

 Gen. BEMBIDION. 



Gen. BRACHINUS, Fab. Lat. 



Labium membranaceous, entire ; palpi filiform ; abdomen oblong 

 square, thick, with interior glands secreting a caustic, vola- 

 tile, and detonating liquor. 



This genus is found under stones. To terrify their enemies they explode from the 

 anus a liquor, which exhales into vapour, and which burns or blackens the skin ex- 

 posed to its action. 



B. crepitans, Fab. About four lines long ; of a red fawn-colour, with 

 the third and fourth joints of the antennae, the back part of the 

 breast, and abdomen blackish ; elytra of an obscure blue or deep 

 green colour, finely furrowed. Inhabits Europe, under stones. 

 Lat, Gen. i. 189. 



B. sclopeta, Fab. Red fawn-colour, with the elytra dark blue or 

 violet, the upper part of the suture the colour of the body. In- 

 habits Europe, under stones Lat. Hist. viii. pi. 72, fig. 4. 



Gen. HARPALUS, Lat. Carabus, Fab. 



Males with the first four tarsi dilated ; palpi filiform, terminat- 

 ed by an oval joint ; a notch in the internal side of the two 

 anterior legs ; elytra entire, or not truncated at their poste- 

 rior extremity ; antennae filiform ; labrum notched ; labium 

 projecting beyond the chin ; body oval ; thorax of a trans- 

 verse square form. 



H. megacephalus, Lat. Elongated, convex, shining black above, 

 brownish black below ; antennae and tarsi fawn-coloured ; head 

 as large as the body ; thorax square, separated from the abdomen 

 by a furrow; elytra striated. Southern Europe. Lat. Gen. i. 206. 



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