Tkree Genera of Papuan Paasalid Coleoptera. 10.") 



ov grooves; the ridges joining the inner tubercles to oneanother and to 

 the outer tubercles, tonn a Single, more or less semicircular eurve, tue 

 left arm of wlüch is directed slightly inwards at its extremity, and all 

 three sides of the frontal area are more or less concave; the apei of tlie 

 lefl outer tubercle is bluntly and imperfecta bifid; the anterior angles 

 of the head are of not more than 120 . and are very slightly prominent 

 in perfectly fresh specimens; the canthus is more or less roimded or 

 ahnost vertically truncate externally; the parietal ridges are lightly 8-shaped. 

 The prothorax is unpunctured above except in the scars; the marginal 

 groove is widely incomplete across the middle in front and behind; the 

 median groove is well-developed and complete behind, but not in front; 

 the posterior angles of the lower side of the prothorax are elosely punctured 

 and clothed with long hair, the anterior angles being hairless and 

 unpunctured. The scutellum is smooth and polished, except in the 

 middle of the anterior margin. and in the extreme anterior angles, where 

 it is finely punctured and pilose. The Mesothoracic episterna are 

 punctured throughout, except in the posterior angles. The mesosternum 

 is more or less strongly rugose, except in the angles behind the scars, 

 which last are not very well defined. The anterior intermediate areas of the 

 metasterniun are not separated from the lateral areas. and both are very 

 liaiiy and rugose; the posterior intermediate areas are hairless and polished. 

 with a t'ew large punctures. The posterior parts of the bind coxae are 

 more or less rugulose or finely punctured. The sculptuiing of the anterior 

 abdominal sterna is variable; the posterior abdominal sterna are smooth. 

 The elytra hairless. and are smooth except in the grooves, of which the 

 outer are more strongly punctured than the inner. 



Genus Hyperplesthenus. Kuwert. 



Anterior margin of head more or less distinctlj asymmetrical, outer 

 tubercle of lefl side broader than thal of right; left outer tubercle 

 truncate or double, righl similar or simply pointed; surface of anterior 

 part of head level, without any trace of deep excavations on either side. 

 Antennae with six lamellae, none of which are very long orslender; the 

 first of them not always well developed. Dentition normal, complete and 

 well-developed on both mandibles. No primär} scars on mentum; 

 secondary scars not verj large, never reaching posterior margin, theii 

 posterior ends never widely separated and sometimea united. Anterior 

 intermediate and lateral areas of metasternum fused. Type. II. in 

 Kuwert. 



