TRICHOGOMPHUS SEMMELINKII. 159 



rounded lateral angles in two of my three specimens; in 

 my third specimen it is distinctly emarginate. The cepha- 

 lic horn curved backwards , covered with a punctuation 

 which is fine and dispersed on the sides, coarser and 

 denser set on the front surface especially towards the 

 base ; the hinder surface of its apical half is provided with 

 a strongly compressed protuberance. 



The prothorax margined , narrowed before and behind , 

 more strongly however at the anterior half; the anterior 

 lateral angles protruding , sub-acute ; the posterior lateral 

 angles rounded ; the anterior margin inconspicuously emar- 

 ginated behind the cephalic horn ; the posterior margin 

 tri-sinuated , the median lobe not strongly developed back- 

 wards. The anterior two-thirds of the disk of the thorax 

 excavated and surmounted by a strongly developed 

 basal protuberance, which is obliquely directed forwards-, 

 and semilunarly emarginated at the top ; two compressed 

 triangular lateral protuberances may be observed at a dis- 

 tance of one third of the length of the prothorax from the 

 anterior margin ; the sides of the pronotum and the lateral 

 margins of the basal protuberance coarsely sculptured ; the 

 remaining portion finely and dispersedly punctured; the 

 bottom of the excavation very glossy, almost impunctate. 

 The scutellum large , triangular , entirely visible , densely 

 punctured except on the sides and apex where it is impunctate. 



The elytra are rather densely covered with large, shal- 

 low punctures , which are bordered by a raised line , 

 and intermixed with fine and deeply impressed punctures ; 

 the margined punctures, many of which have a raised 

 central point, become smaller and less distinct near the 

 apex; the shoulders and apices of the elytra are only pro- 

 vided with small deeply impressed punctures; each elytron 

 shows three fiat, almost impunctate oblique costae, marked 

 by two rows of margined punctures and disappearing to- 

 wards the end ; the outer costa is very indistinct and short '). 



1) Tn the largest of my specimens some faint wrinkles across the suture, 

 and a faint longitudinal impression on the outside of the costae may be observed. 



iN^otes from the Lieyden IMviseum, Vol. 111. 



