4 MANDIBULATA. ( OLKOl'TEKA. 



Tarsi postici articulis quatuor. 



Caj)ut haud cordatiun ; thoraci postice intrusum. 

 J5/y//« connata, subtus ad latera inflexa: . . . 57. BlapsiDjB. 

 aut libera, sub abdomine non inflexa. 

 TarH articulis simplicibus. 



AntciiiicB sensim extrorsum crassiores : . 5C. TENEBRiONiDiE- 

 filiformes : . . . 68. IlELOPiDiE. 

 omnes articulo penultimo bifido. 

 ^«<f«na' breviores, vis thorace longiores: . . 59. MelandryiDjS. 



elongataj, corpore fere longiores (tarsi omnes 



rarissinie articulis quinque) : . . O'l. ffiDEMERiD^. 



Caput subcordatum, penitus exsertum. 

 Tarsi omnes articulo penultimo bifido. 



^?jto(»« serratfE, aut pectinatae : . . . 62. Pyrochboid^. 



simplices: ...... C4. Notoxidje. 



Tarsi postici articulis indivisis. 



Ungues simplices :...... 60. MoRDELi.in.'i;. 



apice bifida : ..... 63. Cantharid.e. 



Tarsi omnes articulis quinque : ..... 65. ScYDMiENiDjC. 



Family LVL— TENEBRIONIDiE, Leach. 



Mandibles bifid at their extremities : maxillas generally unguiculated : mentum, 

 small, not broader than long : labium coriaceous, generally porrected 

 beyond the mentum; labial palpi mostly very short, with the terminal joint 

 thickened and obtuse. Antennae moniliform, or distinctly increasing in 

 thickness to the apex, sometimes perfoliated, or serrated : head more or less 

 triangular, without a contraction behind at its junction with the thorax, 

 into which it is usually inserted up to the eyes : bodi/ elongate, or oval, 

 sometimes gibbous : elytra mostly free, rarely united : legs short ; tarsi 

 with entire joints. 



The insects of this family are most frequently of black or obscure 

 colours, and often destitute of wings, or have those organs so much 

 abbreviated as to be useless for flight : the greater portion of the 

 species frequent cellars and other dark places, or beneath stones in 

 sandy districts, and shun the light : others, which are, as usual, of 

 more lively colours, are found beneath the bark of trees or in fungi; aU 

 subsist upon vegetable substances, or upon decomposed animal matter. 



Antennce moniliformes, haud perfoliatje aut serratae. 

 Corpus elongatum ; angustum, 



Antennce Siiioxmss: 425. Tenebrio. 



clavatEE, 



articulo S-lio breve : ... 426. Stene. 



elongate, 



4.to subsequale . 427. Uloma. 



multolongiore 428. Alphitobius. 



