308 NEW SPECIES OP AUSTRALIAN COLBOPTERA, 



specimens of this species I have under examination, both sexes 

 are present, the difference is but slight: those I take to be males 

 have a slightl)' larger club and broader elytra, the prothoi'ax 

 always entirely black, and the tarsi feebly tinged with piceous. 



L/EMOSACCUS INSTABILIS, n.sp. • 



jj. Black; antennt>3 and tarsi pale red, rostrum piceous, its apex 

 sometimes dull red, tip of femora and tibite and extreme apex of 

 elytra tinged with red. Pygidium and under surface almost nude. 



Eyes large, prominent, almost touching. Rostrum straight, 

 short, shining, perfectly cylindrical, with feeble elongate punctures. 

 Antennae short, scape very short, inserted at eyes, almost geni- 

 culate, 1st joint of funicle large, transverse, distinctly wider than 

 scape, rest of the joints short, thick, their combined length not 

 equalling club. Prothorax with bulged sides, much more strongly 

 punctate than usual in the genus, with a distinct longitudinal 

 furrow- extending its entire length, a small and distinct impres- 

 sion on each side of middle. Scutellum small, circular, within a 

 depression. Elytra about once and one-third as long as wide, 

 feebly curved inwardly behind the shoulders, interstices narrow, 

 convex, transversely granulate. Pygidium feebly carinate, seen 

 from the head appearing minutely mucronate. Anterior femora 

 long, strongly toothed, tibiae short, 3rd tarsal joint wide, claw 

 joint small but moderately distinct. Length 2i, rostrum f (vix); 

 width 4; range of variation 2-2^ mm. 



Q. Differs in being slightly larger on an average; rostrum dull 

 red, tinged with piceous across its middle or apex; thorax tipped 

 at apex with red; elytra either entirely red or red with the sides 

 and apex black, sometimes with a transverse band at apical third 

 and piceous along suture, sometimes with four red spots (two near 

 apex and two near base), and occasionally with only two dull red 

 spots near the base; tibias and apical third of femora red; the 

 rostrum is slightly longer and narrower. 



Hab. — Tamworth, Sydney, N.S.W. 



