new Species of Histeridaj. 159 



of the thorax in the male is rather widely emarginate and 

 without a fossette ; prosternum very broad, shorter and 

 broader, but similar in outline to H. elongatm, Er., and the 

 mentum in the male is simply excavated and smooth, without 

 any carina. 



Three very similar African species may be distinguished 

 from it as follows : — 



H. arcifera, Mars. — Male anterior thoracic angle minutely 

 emarginate ; mentum with a well-marked median carina 

 and the pygidium densely punctured. 



H. arcitenens, Mars. — Male anterior thoracic angles rounded 

 off; body elongate, with a feeble median elevation on the 

 mentum, shortened before and behind. 



H. semicincta, Mars. — Male with a thoracic fossette ; 

 anterior angles within the fossette feebly and minutely emar- 

 ginate; mentum with a distinct median carina. 



Placodes ebeninus, Lew. 



Placodes ebeninus, Lewis, Ann. & Mag. Nat. Hist. (5) xv. p. 458 

 (1885). 



On examining further specimens of this species, I find that 

 the prosternum is constantly broader than that of P. coffer, 

 Er., and that the prosternal striae are always wanting. 



Apobletes tuber cul if rons, sp. n. 



Oblongns,subquadratus, subdepressus, niger, nitidus; fronte in medio 

 tuberculata, antice parum concava ; pronoto, stria antice inter- 

 rupta, ad angulos impresso, puuctato ; elytris striis tenuibus, 1" 

 subintegra, 2 a completa, 3 a late interrnpta ; pygidio utrinque 

 depresso, in medio convexo, punctato ; prosterno loevi, bistriato ; 

 mesosterno late emarginato, antice haud striato. 



L. 7 mill. 



Oblong, but somewhat quadrate, rather depressed, black 

 and shining ; the head has a small, not highly raised tubercle 

 in the middle, and is concave in front of it ; before the eye 

 the head projects in a well-marked acumination, and boyond 

 the projection the outline of the head is bisinuous, the lateral 

 stria stops at the first sinuosity, but posteriorly it continues 

 as a fine stria round the back of the head, along the flue line 

 there is a row of detached points ; the thorax, the lateral 

 stria is very fine and difficult to see, it is only visible from 

 above at the angles and it is interrupted behind the head, 

 the anterior angles are impressed and punctured and a few 

 points are also seen at the posterior angles, scutellar point 

 small and shallow ; the elytra, humeral stria very fine, 

 short, basal, and oblique, first stria very fine, shortened 



12* 



