Three Genera of Papuan Passalid Coleoptera. 107 



and unpunctured. The upper surf ace of the head is smootli, polished and 

 ünpunctured; tlie outer tubercles are strongly produced and broadly truncate, 

 the left much broader tlmn the right; the ridgejoining them to the inner 

 tubercles is very strongly developed. r riie inner tubercles are large, and 

 somewhat compressed Laterally. The anterior angles of the head are 

 obtuse, and the outer ends of the canthus rounded. The central tnbercle 

 is laterally compressed. The parietal ridges are very indistinct; they are 

 directed backwards near their origin from the central tubercle, l»nt bend 

 forwards laterally. The prothorax is smooth and polished above, except 

 in the scars which contain hair-bearing punctures; the median groove 

 is very strongl) developed, and practically complete in front: the 

 marginal groove is widely incomplete across the middle before and 

 behind. The anterior angles of the lower side of the prothorax are 

 punctured along the outer margin only; the posterior angles are closelj 

 punctured and very hairy throughout. The scutellum bears a distincl median 

 gi'oove, with a few large punctures on the disc on either side of it. as well as 

 tinei ones in the anterior angles. The Mesothoracic episterna are 

 coarsely but somewhat sparcely punctured, except in the posterior angles 

 which are smootli and polished. The mesosternum is smooth and polished, 

 except in the scars which are somewhat coarsely but irregularly and 

 indistinctly punctured. The fused lateral and anterior intermediate areas 

 of the metasternum are rugose and very hairy; the posterior inter- 

 mediate areas are practically unpunctured. The posterior parts of the 

 hind coxae are rugose. The abdominal sternä are smooth and polished. 

 The elytra are hairless and unpunctured except in the grooves, all of 

 which are somewhat obscurely punctured. 



Hyperplesthenus impar, Kuwert. 



Redescribed from the type specimen from Mt. ^'ule. New Guinea, in 

 the Stuttgart Kai. Naturaliensammlung-, and from a Single 

 worn specimen from Germ an New Guinea in the collection of the Berlin 

 K g 1 . Z o o 1 o gi s c h e s .Mus e u m . 



Length 42mm. The anales of the labrum are somewhat less 

 broadly rounded than in the preceeding species, which this species i esembles 

 in all points not mentioned in the following description. The scars of 

 the mentum are more or less »-shaped, and stronglj curved, and may be 

 united behind to form together a w-shaped figure as in the genus Omegarius, 

 KUWERT; the anterior as well as the posterior parts oi the areas outside 

 these scars, may bear large hair-bearing punctures. The outer tubercles 

 of the head are much shorter than in H. gldber, and thal of the right 

 side is almosl as broad as thal of the left; instead of being sünply truncate 



