118 F. Erasmus Wilson : 



2, 5 longer and a little wider than 4 or 6, 7 wider than 6, widened 

 internally, 8 much shorter than 7, 9 much longer and wider than 

 8, 10 larger than 9, 11 about one and one-half longer than 10, lightly 

 bent, bluntly pointed, and with a tubercule about middle on inner 

 side beneath. Prothorax feebly transverse, strongly convex, sides 

 strongly and evenly rounded almost to base, thence very lightly 

 arcuate; base rounded, transversal groove strongly defined, a 

 little widened in middle and terminating on either side in a large 

 fovea; disc in front of groove coarsely longitudinally strigose as on 

 head; behind groove with somewhat sparse but well-defined punctures. 

 Elytra transverse, sides a little sinuate, widest just before apex, apical 

 margin of each elytron a little produced about centre, sutural striae 

 strongly, dorsal rather weakly, defined, the latter traceable to about 

 apical fourth, lightly deflected outwards towards apex, with well 

 distributed but obscurely defined puncturation. Abdomen with punc- 

 turation more clearly defined than on elytra, with two medio-basal 

 carinules. Metasternum widely impressed down middle. Undersurface 

 of abdomen armed with two lamelliform protuberances at apex of 

 second segment, these placed near together about the middle, and 

 produced backwards, overhanging the third and part of fourth seg- 

 ments, thence recurved abruptly outwards, their apices rounded; fifth 

 segment greatly constricted in middle, sixth almost wholly occupied 

 by a very large and deep excavation. Legs with femora robust, and 

 anterior tibiae toothed internally near apex. 



Length, 2.75 mm. 

 2 Similar, but with antennae normal; front tibiae unarmed, non 

 strigose portion of head not punctate, apices of each elytron lightly 

 rounded, abdominal puncturation rather indistinct and undersurface 

 of abdomen convex. 



Habitat. — Victoria: Healesville, in 'moss. (F. E. Wilson). Eltham 

 (C. Oke). 



The only Australian species of Rybaxis with strigose head. 



Type in author's collection. 



Rybaxis longipilosus, n.sp. 



(? Reddish-castaneous, elytra and appendages paler; clothed with 

 long, erect, somewhat sparse pale pubescence. 



Head, with apical three-quarters covered on disc with a close 

 meshwork of very large shallow punctures, basal quarter almost 

 impunctate, with a round fovea on either side of middle at about basal 

 quarter; antennae of moderate length, joint 1 rather stout, sub- 

 cylindric, 3, 4, 5 each lightly increasing in width from base to apex, 

 3 slightly longer than 4, and 5 than 3, 6 shorter than but slightly 

 wider than 5, 7 a little wider but slightly shorter than 6, 8 sub- 

 quadrate, much shorter than 7, 9 to 11 forming a moderate club, 11 

 rather sharply pointed, a little bent and about equal in length to 

 the two preceding joints together. Prothorax transverse, rather 

 strongly convex, sides strongly rounded, widest a little in advance 

 of middle, the two lateral foveae connected by a strongly-defined 



