236 



NEW SPECIES OF AUSTRALIAN COLEOPTERA. 



middle), hollowed internally, its extreme length equal to that of 

 the three preceding joints. Prothorax broadly transverse, about 

 as long as the head; apex truncate, base rounded; angles obliquely 

 rounded; widest and somewhat angularly produced near the apex; 

 lateral margins rather broadly reflexed, the others narrowly; 

 median line feebly traceable at base. Scutellum triangular, 

 almost concealed by the overlapping prothorax. Elytra parallel- 

 sided almost to extreme apex, not two and a half times as long 

 as head and prothorax combined; shoulders feebly rounded, each 

 with, traces of about three costaj. Penultimate segment of abdo- 

 men deeply and semicircular 1}^ excised. Legs slender, anterior 

 tibiae very feebly bent, lobes of penultimate joint of anterior tarsi 

 widely diverging. Length 4 J, width IJmm. 



Hab. — Barron Falls, North Queensland (Mr. Albert Koebele). 



The extraordinary antennae of this species will at once dis- 

 tinguish it from any of its congeners. 



Heteromastix crassicornis, n.sp. 



^. Black; prothorax, muzzle and undersurface of head, under- 

 surface of basal two- thirds of antenna?, and the entire basal joint, 

 anterior legs, except tarsi, intermediate trochantins, apical half 

 of femora, basal half of tibite, and posterior knees, testaceous; 

 rest of the legs piceous-black or brown; eyes dark brown. Elj'-tra, 

 sterna, and abdomen moderately densely clothed with short 

 greyish pubescence. Elytra densely, minutely, and obsoletely 

 punctate, meso- and metasternum minutely but visibly punctate. 



Head — excluding mandibles — widely transverse, eyes rather 

 large and prominent; antennae thick, increasing to apex, reaching 

 posterior coxn?, Lst joint slightly longer than 2nd-3rd combined, 

 2nd about half the length of 3rd, 3rd slightly longer than 4th, 

 4th-9th subequal, lOth-llth very large and thick, their combined 

 length equal to 4th-9th combined, closely joined, 10th excavated 

 beneath for the reception of the base of the 11th, 11th with 

 depressions at its base above and on the sides, its upper edge as 

 long as 10th, its lower twice as long. Prothorax about twice as 

 wide as long, sides and Imse narrowly reflexed, sides feebly pro- 



