DUTCH BORNEO-EXPEDITION. 139 



Singangi: Ketoengau District, 1 <ƒ (Moret). 

 Pontianak, 1 cT (Moret). 



The cf is distinguished by the more slender 

 anterior tibiae and the presence of a semi- 

 circular dilatation at the end of their inner 

 margin ; moreover their terminal spine is 

 stouter and more strongly curved than in 

 the 9. 

 2. impressicollis , nov. spec. 



Mt. Kenepai, January 1894, 1 cT (Büttikofer), 

 Description: Length (the mandibles included) 14'/3 mm. 

 Glossy black, the femora dark red. Elongate, the thorax 

 distinctly broader than the elytra at the shoulders , the 

 elytra slightly narrowing towards the apex. 



The head is very glossy, narrower than the thorax, 

 concave between the eyes, the occiput regularly convex in 

 a transverse direction ; impunctate with the exception of 

 two transverse elevations between the eyes , which eleva- 

 tions are finely but rather densely punctured; the inner 

 orbit is raised and ends anteriorly in a more strongly 

 raised longitudinal tubercle ; the anterior margin is straight 

 and provided in the middle with two small tubercles which 

 are separated by a semicircular notch ; the ocular canthus 

 is broad , broadly rounded anteriorly, obliquely cut off be- 

 hind, the lateral margins are parallel and slightly raised. 

 The mandibles are strongly and regularly curved , finely 

 punctured, their outer margin is raised, more strongly 

 towards the tip. 



The prothorax is broader than the head , distinctly 

 transverse , narrowly grooved all-around except in the middle 

 of the front margin, the groove covered with shallow 

 punctures ; the front margin bisinuate , with a distinct 

 tubercle in the middle; the anterior angles prominent and 

 rounded, the sides parallel, the posterior angles subangu- 

 lar, the base faintly bisinuate; the disk shining, provided 

 with seven strongly punctured impressions, viz. a longitu- 

 dinal one along the middle approaching nearer to th^ 



Notes from the Leyden JMuseum, Vol. XV'II. 



