232 Mr, Arthur M. Lea's Eevision of the 



The impressions on the head of the female are slightly- 

 variable and on some specimens appear as a shallow im- 

 pression on each side between the eyes, with several smaller 

 ones or small obsolete foveae in front. 



This and all the following species so strongly resemble 

 each other in colour of prothorax, elytra and abdomen, 

 and generally of head, antennae and legs, that practically 

 the only reliable feature on which to differentiate them is 

 the sculpture of the head of the male. The previously 

 described fuscitarsis, hrncliypterus and carioiaticcps and one 

 form of varius are also similarly coloured, whilst con- 

 caviccps is somewhat similar and major might be regarded 

 as just outside of the group. I have females of many 

 other series belonging to the group, and probably of some 

 of those of which only the males are now described. 



Helcogaster T-TUBERCULATUS, n. sp. (Fig. 12.) 



(J . Black ; elytra with a slight bluish or greenish gloss ; apical 

 half of upper and the Avhole lower surface of head, prothorax, and 

 three basal joints of antennae reddish-flavous, knees and 3rd and 

 4th joints of antennae obscure testaceous. 



Head distinctly punctate, base transversely strigose ; largely 

 excavated between eyes, the excavation posteriorly trisinuate ; in 

 middle of excavation a suddenly raised flat-topped tubercle, on each 

 side in front of this to the apex a narrow acute ridge. Antennae 

 not extending to hind legs. Prothorax longer than wide, shallowly 

 impressed at base. Elytra almost impunctate. Basal joint of front 

 tarsi moderately long, rounded and with a black inner rim. 



Length to apex of elytra 3^, of abdomen ^\ mm. 



Hah. N. S. Wales : Jenolan {A. M. Lea). 



Seen from behind with five elevations on the head as in 

 variiis, but the median one of different shape, being narrow 

 at its base and at the top widened so as to somewhat 

 resemble the letter T, it is also decidedly elevated above 

 the others. Fuscitarsis (which from some directions appears 

 to have the head similarly sculptured) when seen from 

 behind appears to have but one tubercle on the head, and 

 in addition has the legs paler and the prothorax shorter. 

 The excavations are closed posteriorly but open in front ; 

 the frontal tubercle (except for the ridges marking its 

 sides) is entirely absent. There are two males before me. 



