BY WILLIAM MACLEAY, F.L.S., &C. 120 



clypeus there is a large prominent conical tooth or horn, the 

 labrum is rather prominent in the middle, and a little emarginate 

 on each side, with four large setigerous punctures ; both mandibles 

 have horns on the inner tooth, but that of the left mandible is 

 much the largest. The thorax is broader than long, scarcely 

 narrowed at the apex and rounded behind with the basal lobe 

 almost truncate. Elytra elongate, almost parallel-sided, rounded 

 in front and behind and not narrower at the apex than at the 

 base, without any impressed punctures on the disc, with a cluster 

 of six on the base, and a row of them in the lateral margins. 



Length, 9 lines. 



Hah, — Endeavour River. 



CoNOPTERUM Barnardi, n. sp. 



Blackish-green, nitid, with the margin of thorax and elytra 

 bright green. The frontal canals diverging much behind, and 

 joined in front by a transverse depression, the clypeus modei'ately 

 emarginate and declivous, a strong conical tooth sloping backwards 

 on the left mandible. The thorax is about as broad as long, the 

 anterior angles a little produced, the basal lobe narrow and recurved. 

 Elytra elongate oval, obsoletely striate-punctate, an impressed 

 puncture near the humeral angle, and another near the outer apex, 

 a number of punctures on the base and a distinct row of them on 

 the lateral margins. The prosternum is rounded at the apex, 

 flattened beneath, and irregularly impi-essed in the middle. 



Length, 11 lines. 



Hob. — Dawson River. 



CONOPTERUM INCORNUTUM, n. Sp, 



I have some doubt as the genus of this insect. It differs from 

 Garenidium in the shape of the labrum and clypeus, and from 

 Conopterum in having the mandibles not horned ; this however may 

 be only a sexual difference. The colour is a nitid black with green 

 margin, the tarsi, antennae and palpi piceous. The head is finely 

 acuducted, with some transverse striae near the clypeus, that and 

 the labrum are scarcely if at all emarginate. The thorax is like 



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