BY T. G. SLOANE. 569 



strotus ( = Lestianthus), and Parallelomorpha. In regard to 

 the last-mentioned genus, which is unknown to me in nature, 

 an examination of the original figure and description has con- 

 vinced me that it is not a member of the present tribe. 



Primitive characters.— The following appear to be primitive 

 characters in the Helluonini. Body and its members (including 

 interstices and epipleura of elytra) densely punctate-setose ; 

 wings present. Head with two sensitive hairs on each side above 

 eyes. Antennce with three basal joints cylindrical and sparse- 

 ly setose. Mandibles short. Labrum with six sensitive hairs. 

 Mentuin punctate, median tooth triangular. Ligula wide ; 

 two anterior sensitive setae ; margin not fringed with setae. 

 Paraglossae narrow, cartilaginous, nearly as long as ligula, 

 adnate to it, except just at tip (e.g., Omphra). Abdomen 

 with sensitive apical hairs. Leys : anterior femora without a 

 triangular prominence on lower side near base; tarsi, in cf , 

 with joints 1-4 dilatate and biseriately squamose on lower side. 

 According to the degree to which the characters mentioned 

 above are represented in a species, so may it be regarded as 

 approaching the ancient Helluonid type ; and in accordance 

 with the degree to which they become lost, so may it be sup- 

 posed to depart from the original type. 



Primitive characters of the Australiaii group. — Head with 

 orbits protuberant and setose behind eyes. Antennce with 

 fourth joint less cylindrical than third and densely pubescent 

 (e.g., Helluodema). Labrum with more than two sensitive 

 hairs. Mentum with a prominent triangular median tooth. 

 Ligula with a fringe of setae. Paraglossce cartilaginous, rudi- 

 mentary. Palpi with penultimate joint short. Pronotum 

 densely punctate and longitudinally rugose. Abdomen with 

 apical sensitive hairs (e.g. Dicranoglossus^) . Legs: anterior 

 femora with an antebasal prominence on lower side ; anterior 

 tarsi in cf , with second and third joints dilatate and biseriate- 

 ly squamulose in middle of lower side. 



• Probably a case of reversion. 



