121 



Jiah. — New South Wales: Sydney (Dr. E. W. Ferguson). 

 Type, I. 11920. 



The excavation on the head of the male is obtusely 

 bilobed posteriorly. Seen from behind the head appears 

 quadrituberculate, the larger tubercles being adjacent to the 

 eye, and distinct from all directions; but from oblique 

 directions it may be seen that the tubercles represent the 

 ends of a narrow curved ridge on each side. The elytral 

 punctures, although small and somewhat rugulose, are much 

 more distinct than is usual in the genus. In my table would 

 be associated with H. niger, which is a larger species, with 

 different excavation, and much longer antennae; it is about 

 the size of H. gagatinus , and the females are very similar, 

 but the male has very differently sculptured head. 



Helcogaster coelocephalus, n. sp. 



<S . Black; parts near eyes, and four basal joints of 

 antennae, more or less flavous. Almost glabrous. 



Head wide, with a large and irregular excavation, with 

 small tubercles; in parts densely punctate. Antennae rather 

 long. Prothorax near apex slightly wider than long, with 

 a shallow, subbasal depression. Elytra moderately long; 

 with minute punctures. Basal joint of front tarsi lopsided, 

 with an inner black comb. Length, 2 mm. 



Hah. — Northern Queensland (Blackburn's collection). 

 Type (unique), I. 11896. 



The excavation on the head is trisinuate posteriorly, the 

 median sinus being bounded by an oblique elevation on each 

 side (from some directions the elevations look like small 

 tubercles). The head, viewed from behind, appears to have 

 four small elevations : two black, median, widely triangular 

 ones, and a pale one, curved inwards, at the side of each 

 eye; from the preceding species, in which the ocular tubercles 

 are black, it is also distinguished by the trilobed posterior 

 end of the excavation. In my table it would be associated 

 with H. niger, which has thicker antennae, and head very 

 different, when viewed from behind. 



Helcogaster triangulifer, n. sp. 



d" . Black; labrum and four basal joints of antennae 

 flavous. A few inconspicuous dark hairs on sides. 



Head with a deep, irregular impression or excavation in 

 middle. Antennae rather long and obtusely serrated. Pro- 

 thorax slightly longer than the greatest width, base much 

 narrower than apex; a wide subbasal depression, closed at 

 its ends; a few punctures on sides. Elytra moderately long; 

 with minute, indistinct, rugulose punctures. Basal joint of 



