On neiv Phytophagous Beetles. • 377 



EXPLANATION OF THE PLATES. 



Plate XII. 



Upper surface of the smaller crauium of Pteroplax comuta, of the natural 

 size ; the portions of ribs mentioned in the text as lying upon and 

 imder the cranium are seen. Fr, frontal hone ; Pt.Fr, post- 

 frontal ; Pt. O, postorbital ; Pa, parietal ; Sq, squamous ; Up, 

 epiotic; Q, quadrate ; ^x. O, exoccipital ; iS. O, so-called supra- 

 occipital. The parietal foramen and the epiotic horns are suffi- 

 ciently evident. 



Plate XIII. 



Fig. 1. Under surface of the larger cranium of Pte?-oplax corntita, of the 

 natural size. i'V, frontal bone ; IH.Fr, postfrontal; i^.O, post- 

 orbital ; Sq, squamous ; Ep, epiotic ; Q, quadrate ; Oc, occipital. 



Fig. 2, A, B; Scutes : A upper, B under surface. 



Fig. 3, A, B, C. Three digital bones. 



XLVIII. — Characters of new Genera and of some undescrihed 

 Species of Phytophagous Beetles. By Joseph S. Baly, 

 F.L.S. 



Fam. Sagridae. 



Orsodacna variabilis. 



0. elougata, convexa, pube subdepressa grisea vestita, subtus cum 

 antennis nigra, thorace rufo, ad latitudinem fere oequilongo, late- 

 ribus pone medium constrictis, disco subremote rude puncl ato ; 

 capite elytrisque viridi- aut caeruleo-aeneis ; antennis pedibusque 

 pallida piceis, femoribus obscurioribus. 



Var. A. capite elytrisque obscure nigro-violaceis, aeneo vix mican- 

 tibus. 



Var. B. elytris apice fulvis. 



Var. C. antennis elytrisque obscure fulvis, illis seneo tinctis. 



Long. 2-3 lin. 



Hab. Kurdistan. 



Head trigonate ; vertex strongly but not closely impressed 

 with large punctures ; space between the antennte transversely 

 excavated ; lower portion of clypeus and mouth fulvo-pice- 

 ous, apex of jaws nigro-piceous ; antennae rather more than 

 half the length of the body, pale piceous, more or less stained 

 with fuscous. Sides of thorax constricted behind the middle, 

 obtusely rounded in front ; disk sparingly clothed with coarse 

 suberect hairs, remotely impressed with large, deep punctures. 

 Scutellum semiovate, smooth, impunctate. Elytra broader 

 than the thorax, parallel, convex, depressed along the suture ; 



