On new Phytophagous Beetles. 377 



EXPLANATION OF THE PLATES. 



Plate XII. 



Upper surface of the smaller cranium of Pteroplax cornuta, of the natural 

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

 under the cranium are seen. Fr, frontal bone ; Ft.Fr, post- 

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

 epiotic; Q, quadrate; ^.r. O, exoccipital ; .S'.O, so-called supra- 

 occipital. The pariettil foramen and the epiotic horus are suffi- 

 ciently evident. 



Plate XHI. 



Fiff. 1. Under surface of the lararor cranium of Pteroplax cornuta, of the 

 natiu-al size. Fr, frontal bone ; Pt.Fr, postfrontal; Pt.O, post- 

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



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



Fiff. 3, A, B, U. Three digital bones. 



XLVIII. — Characters of new Genera and of some undescribed 

 Species of Phytophagous Beetles. By Joseph S. Baly, 

 F.L.S. 



Fam. SagridsB. 



Orsodacna variabilis. 



0. elongata, convexa, pube subdepressa grisea vestita, subtiis cum 

 antennis nigra, thorace rufOj ad latitudinem fore aequilongo, late- 

 ribus pone medium constrictis, disco subremote rude punctato ; 

 capite eh'trisque viridi- aut cseruleo-aeneis ; antennis pedibus(|ue 

 pallide piceis, femoribus obscurioribus. 



Var. A. capite elj'trisque obscure nigro-violaceis, a^neo vix mican- 

 tibus. 



Var. B. elytris apice fulvis. 



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



Long. 2-3 lin. 



Hah. Kurdistan. 



Head tx-igonate ; vertex strongly but not closely impressed 

 with large punctures ; space between the antenna? transversely 

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

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

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

 with fuscous. Sides of thorax constricted beliiud the middle, 

 obtusely rounded in front ; disk sparingly clothed witli coarse 

 suberect hairs, remotely impressed with large, deep punctures. 

 Scutellum semiovate, smooth, impunctate. Elytra broader 

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



