222 



acute posterior angles, the larger seriate punctures of the 

 elytra, and the granular intervals. The size of the single 

 specimen sent is also smaller than Blackburn's insect, with 

 its elytra not wider than the thorax. Type, I. 2206, in the 

 South Australian Museum. 



GONOCEPHALUM COSTATUM, n. Sp. 



Shortly, rather squarely ovate, dull-fuscous, clothed with 

 squamose derm, with some vitreous nitid spots irregularly 

 scattered over the whole upper-surface (as in some Trox 

 species), head and thorax closely covered with bristly short 

 black hairs. 



Head deeply received into the thorax, clypeus with 

 shallow arcuate emargination, a narrow straight impression 

 separating it from the front, canthus as wide as the eyes 

 and extending about half-way across posteriorly, surface 

 rather strongly granulose, antennae not reaching the base of 

 prothorax, joints 8-10 transverse and successively wider, 

 eleventh oval. Prothorax 2 (vix) x 2'8 mm., widest at the 

 middle, much wider at base than at apex, the former bi- 

 sinuately the latter circularly emarginate, anterior angles 

 rounded and reflexed, produced in front of the eyes, sides 

 rather widely rounded, subsinuate before the produced acute 

 posterior angles; foliate margins wide, horizontal behind, re- 

 flexed at the wide anterior angulation, the short bristly hairs 

 giving the border an appearance of serrulation ; disc rugose 

 granulose, with some scattered vitreous spots on the intervals, 

 medial impression distinct throughout. Scufelhim small and 

 indistinct. Elytra as wide as prothorax at base, slightly 

 widened behind the middle, each elytron with four (besides 

 a short scutellary one) rounded, slightly raised costae consist- 

 ing (when seen under a strong lens) of two or three rows of 

 elongate granules (these where denuded of the clothing very 

 nitid) ; alternating with these costae are narrow lines of single 

 rows of granules, the intervals (when denuded of the close 

 derm by pin scratch) showing fine seriate punctures very 

 closely placed. Anterior tibiae moderately dilated at apex, 

 and strongly serrated on outside, prosternum, epipleurae, sides 

 of abdomen and legs granulose and nigro-setulose, meta- 

 sternum and abdomen coarsely punctate. Dimensions — 

 6 (vix) x 3 mm. 



Hah. — Queensland: Cairns. 



This little species differs from all those described in its 

 costate elytra, with the alternate rows of granules, its ap- 

 parently impunctate elytra, its nigro-setulose clothing, and 

 the nitid quasi-vitreous maculae on its upper-surface. In sun- 

 light these spots flash brightly in contrast to its otherwise. 



