574 MR. M. JACOBY ON NEW [NoV. 1, 



ffiDIONYCHIS CLYPEATA, n. Sp. 



Flavous ; the antennse (the lower four joints excepted) and the 

 tarsi black ; clypeus strongly produced ; thorax impunctate ; elytra 

 scarcely perceptibly punctured, obscure fulvous. 



Length 2| lines. 



Head impunctate, the frontal tubercles entirely absent, the space 

 between the eyes deeply excavated ; the clypeus produced, flattened 

 and truncate at the apex ; the antennse extending to about half the 

 length of the elytra, black, the lower four joints fulvous, the basal 

 joint widened, nearly subquadrate and short, the second one half the 

 size, the third and fourth equal, the terminal joints slightly 

 thickened ; thorax strongly transverse, not narrowed in front, the 

 sides rounded, with a distinct flattened margin, the anterior angles 

 pointed, the disc unevenly raised at the sides, with several de- 

 pressions, entirely impunctate ; elytra minutely punctured, darker 

 than the thorax ; legs flavous ; the knees and the tarsi black ; 

 posterior claw-joint strongly swollen, black. 



This differs from all the Madagascar species of (Edionychis 

 described in the structure of the clypeus and head, &c. 



DiPHAULACOsoMA, H. gen. {Ilalticince). 



Body ovate ; palpi thickened ; antennse robust and short, the 

 terminal four joints dilated and compressed ; thorax transverse, 

 without depressions, the sides strongly dilated and widened at the 

 middle, constricted at the base ; scutellum subquadrate, its apex 

 truncate ; elytra narrowed and subacute at the apex, obsoletely 

 punctured, their epipleurse extending below the middle ; femora 

 robust, the posterior ones thickened ; the tibise not channelled, the 

 posterior ones with a s|)iiie ; the first joint of the posterior tarsi 

 as long as the following two joints together ; claws appendiculate ; 

 prosternum narrow, convex; the anterior coxal cavities open. 



The genus here proposed is principally distinguished by the 

 dilated terminal joints of the antennae and by the peculiar shape of 

 the thorax, which is strongly widened and rounded at the middle, 

 in connection with the open cavities. Sphccrophysa, Baly, also in- 

 habiting Madagascar, has the antennse hkewise dilated ; but this 

 dilatation is not confined to the terminal joints ; the body in Sphcs- 

 rophysa is also strongly rounded, not ovate, and the coxal cavities 

 are closed. 



D1PHAULACO.SOMA L^viPENNE, n. sp. (Plate XXXIX. fig. 8.) 



Entirely fulvous, shining; terminal four joints of the antennse 

 black ; thorax impunctate ; elytra wider than the thorax, entirely 

 impunctate ; tarsi fuscous. 



Length 2| lines. 



Head impunctate ; the frontal tubercles oblique, distinct, bounded 

 behind by a transverse groove ; the clypeus with a short central 

 ridge ; penultimate joint of the palpi thickened ; antennse only ex- 

 tending a little beyond the base of the elytra, fulvous, the terminal 

 four joints black ; thorax twice as broad as lo.ig, dilated at the sides, 



