234 Mr. Arthur M. Lea's Revision of the 



above the general level, whilst the outline of the body 

 resembles that of conccwiceps. The excavation is nowhere 

 open, and its whole outline is quadrisinuate. The median 

 frontal sinus is narrower than the posterior one, in con- 

 sequence the lateral ones are more apical than basal ; the 

 median basal sinus in fact is so wide that the ^base might 

 be quite fairly regarded as unisinuate. From behind from 

 one point of view there appear to be three small tubercles 

 below the level of the non-excavated portion. From the 

 sides there appears to be a small tubercle close to each 

 eye. The elytral punctures are small, not very dense, and 

 many of them are rugose, but from certain directions a 

 few of them are sufficiently clear. 



Helcogaster decipiens, n. sp. 



$ . Deep black, elytra with a slight greenish gloss ; a subtriangu- 

 lar apical portion of head, prothorax, and two basal joints of antennae 

 reddish-flavous ; extreme base of tibiae testaceous. 



Head with rather small punctures in places ; base and sides more 

 distinctly strigose than usual ; largely excavated between eyes, the 

 excavation trisinuate posteriorly ; frontal tubercle large and concave, 

 its sides in front thickened and subtuberculate, its base in middle 

 marked l)y an aci;te conical tubercle. Antennae (and especially the 

 apical joint) stouter than usual, terminated half-way between middle 

 and hind coxae. Prothorax about as long as wide, apex very feebly 

 impressed. Elytra almost impunctate. Basal joint of front tarsi 

 not very large, but strongly rounded. 



Length to apex of elytra 3, of abdomen 5 mm. 



Hah. Tasmania : Swansea {A. M. Lea). 



The cephalic excavations, though large, are rather smaller 

 than usual. The median sinus wide and without a pro- 

 jecting median lobe, elytra smoother and front of head 

 pale readily distinguishes it from insularis (the common 

 Tasmanian species) to which in colour and general appear- 

 ance it bears a striking resemblance. The width alone 

 of the median sinus at once distinguishes it from varius, 

 although when viewed from behind the head appears to 

 have five tubercles, but of these the median one is in a 

 different position. From the others having the base of 

 the excavation trisinuate it can be distinguished by the 

 median tubercle (which is very distinct from the sides) not 

 rising from its own base but forming part of the frontal 

 elevation. In the unique specimen before me the extreme 



