BY T. G. SLOANE. 585 



angu state to base; disc with three subobsolete longitudinal ridges. 

 Elytra with interstices 1-7 lightly convex, biseriately punctate. 

 Tarsi setose; penultimate joint small, simple. Type, Helluosoma 

 resplendens Cast. 



The genus Dlcranoglossus is a terminal one, allied only to 

 Helluonidius, and derived from the same stem. Found under 

 bark on tree-trunks. 



DiCRANOGLOSSUS RESPLENDKNS Castelnau. 



Helluosoma resplendens Castelnau, Trans. Roy. Soc. Victoria, 

 viii., 1868, 109 : Dicranoglossus resplendens Chaudoir, Rev. & 

 Mag. Zool, vii., 1872, 217: Gestro, Ann. Mus. Civ. Genova, vii., 

 1875, 874: jEnigma parvulum Macleay, Trans. Ent. Soc. N. S. 

 Wales, ii., 1873, 323. 



Upper surface bright blue. Prothorax small (1-9 x 2-8 mm.) ; 

 basal angles near peduncle; elytra oblong (7x4 mm.) ; eighth 

 interstice not divided from ninth, coarsely punctate. Last ventral 

 segment with several long setae on apical margin. Length 

 12-5 mm. 



I have identified jEnigma parvulum Macl., as identical with 

 H. resplendens from Macleay's types. 



Hah. — Tropical Australia, from Rockhampton to King's 

 Sound. 



Genus Helluosoma. 



Castelnau, Trans. Roy. Soc. Victoria, viii., 1868, 107. 



Elongate, depressed, winged, black. Head sharply nar- 

 rowed to neck ; one supraorbital sensitive seta on each side ; 

 eyes convex, enclosed behind in large orbits. Antennae rather 

 long, compressed ; three basal joints cylindrical, fourth short, 

 subcylindrical. Labrum large, convex in middle of apex, four- 

 setose. Mentum with a short triangular median tooth ; lobes 

 short, pointed (point formed by the epilobes). Ligula convex, 

 narrow, elongate, roundly obtuse at tip ; two sensitive hairs 

 distant from apex. Palpi stout. Maxillae with inner lobe 

 narrow, without a median prominence on inner side ; apical 

 hook lightly inturned, its outer edge curving evenly with outer 



