Australian and Tasmanian Malacodermidae. 225 



Head with scattered punctures and at base transversely strigose ; 

 concave but not largely excavated between eyes ; in front with a 

 large tubercle. Antennae rather long and thin, but not extending 

 to apex of elytra. Prothorax longer than wide, base considerably 

 narrower than apex and sliallowly transversely impressed ; a few 

 small punctures at the sides in front. Elytra long ; densely covered 

 with rather large, sharply defined punctures. Basal joint of front 

 tarsi about half their total length and with a dark inner rim. 



Length to apex of elytra 2^, of abdomen 3j mm. 



5- Differs in being larger; head with more distinct punctures, 

 without tubercle and absolutely bifoveate in front ; and the front 

 tarsi simple. 



Hah. Queensland : Cairns (types in Macleay Museum). 



Placed in Helcogastcr on account of the concave head 

 and long antennae, but the strongly punctured elytra 

 (which alone readily distinguishes it from all recorded 

 species of Helcogaster) would seem to imply that it 

 belongs to Cao^phurus). The apical tubercle on the head of 

 the male from above appears to be obtuse, ovate, and with 

 a large median puncture ; from the sides it appears as a 

 narrow abrupt ridge, and from behind as a small acute 

 tubercle. 



Helcogaster tuberculifrons, n. sp. (Fiff. 10.) 



(J. Reddish-flavous. Seven terminal joints of antennae, apical 

 three-fifths of elytra and two apical segments of abdomen black ; 

 metasternum and two apical joints of tarsi infuscate. 



Head with small punctures and at base transversely strigose ; 

 feebly impressed or flattened between eyes and on each side in 

 front ; with a large trilobed tubercle. Antennae rather long and 

 thin, but not passing hind coxae. Prothorax slightly longer than 

 wide, towards base with a large shallow impression, base distinctly 

 narrower than apex. Elijtra elongate ; almost impunctate. Basal 

 joint of front tarsi with a black inner rim. 



Length to apex of elytra 2|, of abdomen 3^ mm. 



ffab. N. S. Wales : Illawarra {H. J. Carter). 



From above the cephalic tubercle appears to be trilobed, 

 the frontal lobe with the apex almost between antennae, 

 the hinder lobes almost exactly midway between the eyes, 

 the hinder lobes are connected with the frontal one but 

 not with each other ; from behind the head appears to 

 have a small bilobed median tubercle, from the sides a 



TRANS. ENT. SOC. LOND. 1909. — PART I. (MAY) Q 



