122 



front tarsi lopsided, with a small black inner comb. Length, 

 2*25-3 mm. 



Rab. — Victoria: Alps (Blackburn's collection), Lome 

 (F. E. Wilson), Fern Tree Gully (F. P. Spry). Type, 

 I. 11894. 



From an oblique direction the head in front of the 

 excavation appears to have an oblique groove near each eye, 

 then an oblique ridge, then another groove, and then a 

 short median ridge; but from other directions the whole 

 space between the subocular grooves appears to be a feeble 

 semicircular elevation, and in fact its appearance varies with 

 the point of view; the excavation has a wide triangle 

 projecting into its middle from the base of the head, so that 

 its posterior end is obliquely directed behind each eye. The 

 basal portion of the head, which, however, is often concealed, 

 is densely punctate. On the type the sides of the head 

 adjacent to the front are obscurely diluted with red. 



Two males, from the Dividing Range (Victoria), differ 

 in being more of a piceous-brown than black, with most of 

 the head, base, and sides near base of prothorax, knees and 

 other parts of legs more or less flavous. Three females, 

 mounted with them and evidently belonging to the species, 

 are coloured as the males, except that one has the prothorax 

 entirely pale; they differ in having the head smaller and 

 nonexcavated, with a slight longitudinal elevation in front, 

 and the front tarsi simple. A male, from the Blue Mountains, 

 has the muzzle and sides of head in front of eyes, base of 

 prothorax, and knees, more or less reddish. A male, from 

 Illawarra, is like the preceding specimen, except that the 

 prothorax is entirely pale. All these males agree in having 

 a wide triangle projecting into the middle of the interocular 

 excavation; in my table they would be associated with 

 H . nic/er (except the one from Illawarra) ; from which they 

 differ in the antennae, and in the excavation not trisinuate 

 at base. The Illawarra male would be associated with H. 

 concaviceps, but its head is of different shape, and differently 

 sculptured, etc. 



Helcogaster macrocephalus, n. sp. 



<S . Black; labrum, four basal joints of antennae, 

 prothorax, parts of middle and of hind femora, and of tarsi, 

 and most of front legs, more or less reddish. Sides with 

 rather numerous, blackish hairs. 



Head rather large, wide, and flat; with two small 

 oblique foveae between eyes, two very small ones in middle 

 behind them, and a shallow longitudinal depression each side 

 in front; with fairly numerous, asperate punctures; towards 



