580 STUDIES IN AUSTRALIAN ENTOMOLOGY, NO. IX., 



Head convex, widely and lightly transversely impressed between 

 base of eyes, not swollen behind eyes; clypeal suture well marked, 

 connecting the punctiform frontal fovefe; eyes prominent, hemi- 

 spherical, lightly inclosed at base. AntennjB filiform, four basal 

 joints cylindrical, others compressed. Prothorax transverse 

 (2-7 X 3-2 mm.), widest about middle; sides strongly and evenly 

 rounded ; basal angles not mai'ked ; apex lightly emarginate, 

 angles obtuse, a little marked ; base a little rounded ; border 

 narrosv; marginal channel fine; median line very lightly impressed; 

 inner lateral impression of base deep, narrow, not long, external 

 impression small, shallow, round (almost obsolete), divided from 

 inner impression by a narrow raised space; posterior marginal 

 setigerous puncture placed at extremity of marginal channel. 

 Elytra oval (6"2 x 3"7 mm.); sides lightly rounded, much wider at 

 base than base of prothorax ; base truncate on each side of 

 peduncle; shoulders rounded; apex lightly and widely sinuate on 

 each side; four inner striae strongly impressed, entire, fifth, sixth 

 and seventh marked near apex (obsoletely indicated and minutely 

 punctulate on sides in the two specimens before me), eighth 

 strongly impressed; four inner interstices and lateral interstice 

 convex for whole length, others convex on apical declivity; lateral 

 interstice punctate, the punctures widely interrupted before basal 

 half. Metasternal episterna elongate, deeply longitudinally 

 sulcate near inner side. Length 10-5, breadth 3-7 mm. 



Hah. : Queensland (given to me by Mr. C. French as from the 

 Endeavour River). 



A distinct species difierentiated at once from all others except 

 D. emarginata, SI., by its wider and less depressed foi'm. It 

 differs from D. emarginata by its larger size; front not longi- 

 tudinally biimpressed; prothorax more rounded on sides before 

 basal angles; fifth and sixth strije of elytra not strongly impressed, 

 etc. From D. mandibularis, Casteln., it is readily distinguished 

 by its less elongate form and the elytra 4-striate on each side of 

 suture. 



