BY WILLIAM MACLEAY, F.L.S., &C. 217 



6. Helluosoma LATIPENNE. 



Entirely piceous-black, with a thin whitish pubescence. Head 

 thinly punctate and largely smooth in front. Thorax cordiforni^ 

 roughly punctate, an oval longitudinal space on the median line 

 bounded on each side by an irregular elevation. Elytra broader 

 than the thorax, three times the length and paralled-sided, 

 densely punctate and deeply striate, the interstices much more 

 convex than in H. aterrimum, Macl., the species it most nearly 

 aj^proaches. 



Length, 9 lines. 



Hob. — Cairns. 



7. Gigadema atrum. 



Black, uitid, elytra somewhat opaque. Head smooth, without 

 punctures, deeply impressed on each side, terminal joint of palpi 

 triangulai-, the labial almost securiform. Thorax cordiform, deeply 

 marked on the median line, finely acuducted transversely. Elytra 

 broad, long and flat, striated, the interstices broad and little 

 convex, without distinct puncturation, but two rows of extremely 

 minute punctures each bearing a very short decumbent seta or 

 setiform scale, may be traced on each interstice ; the elytra are 

 scarcely truncate behind. 



Length, 12 lines. 



Hah. — Russell River, Cairns District. 



This insect departs considerably from the typical species of the 

 genus. The absence of puncturation, and the triangular palpi 

 constitute its chief peculiarities. 



8. Demetrias rufescens. 



Entirely piceous-red or yellow, excepting the elytra which are 

 piceous-brown, and very nitid on both surfaces. Head longer than 

 broad, narrowed a little behind, an irregular longitudinal impres- 

 sion on each side between the eyes, with a small impression in the 

 middle, both palpi pointed but not acutely. Thorax rather 



