275 



two ventral sutures are (as in Alphitohius) excessively strong] j 

 impressed and angulated at the sides, the fourth being much 

 shorter than the third or fifth. On the upper surface the punc- 

 turation (as compared with that of Alphitohius piceiis, 01.) is 

 very much finer and closer on the head and thorax, while the 

 •elytra are more distinctly punctate-striate, w^ith the interstices 

 much more finely and about equally closely punctured. There 

 is a fairly well defined longitudinal fovea at the base of the 

 thorax on either side. 



A few specimens occurred under the bark of drift logs after a 

 flood in the Torrens. 



LiXDiA, gen. nov. 

 Antennae clavat^e, clava 4-articulata ; oculi sat prominentes ; 

 tarsi simplices ; corpus cylmdricum. 



Mentum truncate in front, not keeled, apical joint of labial 

 palpi ovate, of maxillary elongate oblong ; mandibles bifid at 

 :apex ; labrum transverse, at apex slightly emarginate and 

 ciliated ; epistoma scarcely emarginate in front, rapidly 

 widened backwards, its suture obsolete ; antennary orbits 

 produced laterally as much as the eyes , antennae as long as the 

 head and thorax together, joints one and two short, three equal 

 to the preceding two, four shorter, five to seven gradually in- 

 creasing in width and length, eight to eleven forming a rather 

 strong club nearly as long as all the preceding together, eight 

 to ten strongly transverse, eleven narrower, roundly trans- 

 verse ; femora very little narrowed at base ; tibiae not denticu- 

 late ; tarsi moderately slender, hairj^ beneath, apical joint 

 nearly equal to all the preceding together, basal joint of pos- 

 terior pair equal to the next two together ; trochantins of 

 intermediate coxae not visible ; general form cylindrical, re- 

 sembling Sypoji'hlcBUs. 



The little insect for which I found this genus is, I think, 

 closely allied to Si/pophlcBus, differing from it chiefly by its 

 even narrower form, distinctly four-jointed antennal club, less 

 prominent eyes as compared with the antennary orbits, com- 

 paratively longer basal joint of the hind tarsi, and more deeply- 

 impressed sutures between the apical ventral segments. The 

 apical part of the pygidium (but not so much of it as in 

 ILypopMcBus) is exposed. 



Zi. angusta, sp. nov. Minus nitida ; cylindrica ; ferruginea, 

 capite prothoraceque obscurioribus : confertim subtiliter 

 punctata ; prothorace quam latiore paullo longiore ; 

 elytris sparsim transversim rugatis. 



There is a tendency in the puncturation of the head and 

 thorax to become longitudinally confluent ; that of the elytra 



