Mr. C. 0. Waterhouse on new Pectinicorn Coleoptera. 39 



and obtuse. The head is closely punctured with large punc- 

 tures, with a smooth spot behind each mandible, and a dull 

 bare patch on the vertex. The ocular canthus is large, acu- 

 minate, directed outwards and backwards ; between the 

 canthus and the base of the mandible are two nearly equal 

 swellings in the margin. The thorax has the anterior border 

 coarsely punctured, as in N. bubahis, but this border is much 

 broader. The stronger punctuation at the sides does not 

 extend on to the disk, so that it is not visible from above. 

 There is a distinct small triangular emargination just behind 

 the anterior angles. The sulci of the elytra have a series of 

 rather large punctures, with a line of fine punctures on each 

 side on the sides of the intervening costaj. 



Nigidius Welwitschii. 



Niger, nitidus. Capite creberrime punctato, latsribus antice paral- 

 lelis, oculorum can this arcuatis, postice acutis. Thorace transverso, 

 disco antice subtrilobato, subtiliter parce punctulato, margins 

 antico et impressions discoidali fortiter punctatis ; lateribus 

 fere parallelis, fortiter punctatis. Elytris snlcatis, sulcis for- 

 titer punctatis, interstitiis lateralibus costiformibus. 



Long. 5| lin. 



Hob. Angola (Welwitsch). 



The mandibles are rather small, closely punctured, with 

 the horn short and curved. The head is coarsely and closely 

 punctured, the sides in front nearly straight, with a slight 

 dentiform projection just before the anterior angle ; the canthus 

 is arcuate, acute posteriorly. The thorax has the anterior 

 part of the disk trilobate, the border strongly punctured ; the 

 sides straight, strongly angular before the posterior oblique 

 truncature ; rather strongly punctured, the punctures rather 

 near together, crowded together near the front angles at a 

 spot a little removed from the margin. The elytra are sul- 

 cate, the sulci strongly punctured, but the punctures in the 

 first and second sulci are smaller ; on each side of the median 

 line of punctures there is a line of fine punctures. The first 

 and second interstices are not much raised, the others are 

 costiform. 



This species is very near N. nitidus , Th., but has the head 

 of a different form. 



