30 



median ridge on nnder-surface continued on to second, sixth rather shallowly 

 notched at apex, and with a comb of short teeth there, seventh more deeply and 

 triangularly notched. Legs moderately long; front femora stout, obtusely 

 dentate, and with a comb ; front tibiae triangularly dilated about base, the under- 

 side of the dilated part with three golden combs. Length, 9.5-10 mm. 



9 • Differs in being slightly less robust, in having the head slightly smaller, 

 antennae slightly shorter and thinner, and abdomen not notched and combless. 



Hah. — Northern Territory: Oenpelli (P. Cahill). Type in National 

 Museum. 



There are nine combs on the male of this remarkable but dingy insect, 

 four on each of the front legs, and one on the abdomen. In a good light and 

 from certain directions three, composed of numerous, short, close-set golden 

 teeth, may be seen on each front tibia, the combs parallel with each other, 

 with the teeth of the first and second terminating just before the beginning 

 of the second and third, attached to the third one there are also some long 

 bristles; the front femora each have a narrow ridge extending from the base 

 to about the apical third, where it abruptly terminates with the appearance of a 

 fairly strong tooth, the edge of which curves around and is supplied with a 

 somewhat similar comb to those on the tibiae ; the comb on the abdomen of the 

 type is lopsided, commencing gently on one side of the notch and ending abruptly 

 on the other, the teeth, about twenty in number, from some directions appear 

 of a beautiful golden-red, but from other directions of the same colour as the 

 adjacent parts. On the right mandible, slightly in advance of the middle, there 

 is a fairly large acute tooth, then a smaller acute one, and about the base two 

 smaller obtuse ones ; on the left mandible the basal tubercles are more acute 

 and the others are not placed in sequence, but opposite each other, so that the 

 teeth on the other side interlock with them when the mandibles are clenched. 

 The punctures on the head are dense and rather small, but sharply defined, they 

 are slightly larger in front, and denser at base than elsewhere, they are larger 

 on its under-surface and sparser (but still dense) and more sharply defined 

 than elsewhere; on the prothorax they are slightly smaller than on head, and 

 about the base and median line still smaller, but sharply defined ; on the elytra 

 they are much as on base of head, on the abdomen (both surfaces) they are 

 smaller and denser than elsewhere. The front part of the prosternum is finely 

 transversely strigose. The remarkable structure of the front tibiae is much as 

 in Tripectenopus caecus and D. australiac, from the latter it differs in being 

 much larger, darker, punctures somewhat different, and prothorax narrower in 

 proportion. 



Domene microps, n. sp. 



9 • Pale castaneous-brown ; head slightly darker, legs slightly paler. 

 Rather densely clothed with very short ashen pubescence. 



Head between antennae and neck slightly longer than wide, sides almost 

 parallel, hind angles slightly rounded, antennary tubercles shining. Eyes small 

 and with coarse facets. Antennae rather stout, first joint slightly longer than 

 second and third combined, second slightly longer than third, third to tenth 

 subglobular and slightly transverse. Prothorax narrower than head and about 

 as long, hind angles strongly rounded, apical third strongly narrowed to neck ; 

 with a narrow, shining, median line, itself with a very fine impressed line. 

 Elytra slightly longer and distinctly wider than prothorax. Front femora stout 

 and distinctly dentate, front tibiae with a triangular process at base, the process 

 with three fine combs. Length, 3.25-3.5 mm. 



Hah. — Northern Territory: Oenpelli (P. Cahill). Type, in National 

 Museum; co-type, L 15237, in South Australian Museum. 



