240 
positis); pygidio fere levi vel puncturis sparsissimis vix 
impresso ; tibiis anticis extus fortiter tridentatis ; tarsorum 
anticorum unguiculo externo bifido. 
Fem. differt prothorace antice haud tuberculato, magis per- 
spicue punctulato; unguiculis simplicibus; segmento ven- 
trali apicali magis elongata, postice haud emarginato. Long., 
74—8 1.; lat., 44—4? 1. 
The male is easily recognised by the tubercles arranged in 
three pairs—one pair on front of the clypeus one on the clypeal 
suture and one on the front margin of the prothorax. If 
Heteronychus vulgivagus, Oll., was founded on a female example 
(as seems probable from the description) it is just possibly this 
species. The female however does not agree satisfactorily with 
Mr. Olliffe’s description which mentions eight rows of punctures 
on the elytra—a number that can be attained only by counting 
in the confused puncturation between the rows—nor is the form 
of the clypeus at all satisfactorily characterised by the expression 
‘head bisinuate in front.” It may be noted that the male of 
this species (as of all its allies) has the apical ventral segment 
short, and gently emarginate behind; also that in this species 
the prothoracic quasi-excavation is small in area and is little more 
than a slight flattening of the surface. 
N. Queensland ; sent to me by Mr. French. 
I. levipennis, sp. nov. Mas. Ovatus, minus brevis; nitidus ; 
brunneus, antennis palpis coxisque dilutioribus; clypeo 
modice producto, sat fortiter (plus minusve transversim) 
ruguloso, antice bidentato, marginibus modice reflexis, 
lateribus modice sinuatis; fronte a clypeo ut J. bedentis 
divisa, sat fortiter (postice minus distincte) ruguloso; pro- 
thorace quam longiori sesquilatiori, vix manifeste punctulato, 
antice subfortiter excavato, basi haud marginata quam apex 
(hoc in medio tuberculo parvo armato) plus quam duplo 
latiori, angulis anticis subacutis subprominulis posticis 
rotundato-obtusis; scutello sublevi; elytris fere levibus, 
striis vix manifestis vix manifeste punctulatis impressis ; 
propygidio stridulationis organis instructo (his rugis circiter 
sex sat elevatis compositis); pygidio subleevi; tibiis anticis 
extus minus fortiter tridentatis; tarsorum anticorum 
unguiculo externo bifido. 
Fem. differt prothorace nec excavato nec tuberculato; ungui- 
culis simplicibus ; segmento ventrali apicali magis elongato, 
postice haud emarginato. Long., 6—8 1.; lat., 4—441. 
Easily distinguished from all known to me of its congeners by 
its elytra devoid of puncturation or at most with only a few 
punctures here and there, and they so faintly impressed as to be 
