309 ) 



XVII. Descriptions of New Genera and Species ofHete- 

 romera. By Frederick Bates. 



[Bead 2nd November, 1868.] 



The insects described in this paper belong to the fol- 

 lowing families and genera : — 



Fam. Tenebrionid^ Gen. Aryenis, (n. g.). ' 



Goniadera, Perty. 

 ^diatorix, (n, g.) . 



CiSTELiD^ Chromonicea, Pascoe. 



Lagriid^ Xenostethus, (n, g.) . 



In addition to which, three other genera of Tenehrio- 

 nidoi are jDroposed, namely, Chorasmius, JEmymone, and 

 Gamaxus. 



Fam. TEN'EBEIONID^. 



Sub. -Fam. Tenttriinjs. 



Aryenis, n. g. (PI. XY. fig. 1) . 



Taking Orh'gnianus as the type of Guerin^s genus 

 Evaniosomus, the present genus difi*ers from it in the 

 following particulars : form more elongate, slender, de- 

 pressed ; anterior margin of the mentum crenulate, not 

 denticulate, tnandihles much thinner, less strongly curved, 

 and less deeply cleft, at their extremity : epistoma less 

 contracted anteriorly : head narrower, less robust, a little 

 more contracted behind, with the neck a little longer 

 and thinner : eyes larger, more prominent, transverse, ap- 

 proximate beneath: antennce elongate, slender ; the joints 

 gradually becoming of a more cylindrical form as the ex- 

 tremity is approached : joint 3 longer than 2 or 4: 5-10 

 elongate, subequal : 11 scarcely longer than 10, gradually 

 attenuated to the apex, which is somewhat obtusely 

 pointed : prothorax narrow, subcylindrical : scuteUiimvaVich 

 larger : elytra elongate, slender, but little convex, flat- 

 tened or depressed on the discs, not suddenly declivous 

 behind, not carinate ; very gradually widened to beyond 

 the middle, thence gradvially contracted to the apex : 

 epipleural fold subvertical, sinuous — but not arched — 

 broad at the shoulders or base, then suddenly contracted, 

 and continuing moderately narrow to the hind extremity : 



TRANS. ENT. SOC. 1868. PART IV. (dECEMBEr) . 



