BY THOMAS G. SLQANE. 331 



inner lobe with an articulated hook. Palpi : labial slender, 

 longer than maxillary; basal stalk long; first joint very 

 short; second (penultimate) joint narrow, very long, reaching 

 to anterior coxae, plurisetose on lower side; maxillary slender, 

 apical joint longer than penultimate. Labrum (£) large, 

 covering mandibles; apex wide, obtuse; a rather strong tooth 

 followed by a very small second tooth on each side behind 

 apex; margin 6-setose; four closely placed setae on the obtuse 

 apex, and one on each side in the notch before posterior lateral 

 tooth. Pronotum orbiculate (disc tumid and almost hemispheri- 

 cal), rugulose. Seutellum dividing elytra at base. Elytra with 

 derm closely punctate; puncturation rather strong towards base, 

 very fine towards apex, strongly punctate basal part with obscure 

 ferruginous marks, more finely punctate part sericeous. Under 

 surface (including coxae) glabrous; pro-episterna convex, rugulose; 

 metepisterna longer than broad, lightly longitudinally concave and 

 transversely rugulose. Legs very long and slender ; posterior 

 femora slightly bent opposite sides of elytra as, in Distypsidera; 

 intermediate tibiae in male not pubescent on inner side near apex; 

 tarsi long, first joint almost as long as second and third together, 

 third much shorter than second, fourth shorter than third, 

 elongate-triangular, not emarginate at apex; male with joints 1-3 

 squamulose beneath, 4th widely dilatate. 

 Type Distypsidera orbicollis Sloane. 



Rhysopleura orbicollis Sloane. 



Distypsidera orbicollis requires a new genus, which, notwith- 

 standing its very different labial palpi, is nearer Distypsidera 

 than to any other Australian genus. It is, however, extremely 

 isolated, and I do not know its natural position in the tribe 

 Cicindelini. 



Mr. F. P. Dodd has informed me that R. orbicollis " is found 

 on mossy trunks of scrub-trees." 



Genus Distypsidera. 



The genus Distypsidera is at once isolated and characterised 

 by the undulate-plicate-punctate sculpture of the elytra. The 



