496 Mr. C. O. Waterhouse o?i Insects from 



dorso linea nitida vix impressa notato, marginibus et basi sat 

 crebre punctulatis ; elytris sat parallelis, singulis lineis quatuor 

 latis et marginibus crebre punctatis, interstitiis fere Isevibus, niti- 

 dissimis. 

 Long. (mand. exclusis) 9, lat. 3| lin. 



Eab. Mount Roraima, 8500 feet. 



The mandibles have the usual obtuse tooth at the base. 

 The flattened expansion on the inner side is about tlie middle, 

 and is furnished with three or four tubercles or teeth on its 

 margin ; but the two mandibles are not quite similar. Be- 

 tween this expansion and the apex there is a small tubercle 

 and near the apex an indication of another. The thorax is 

 slightly compressed at the sides, which are very gently 

 sinuate before the subbasal angle, where the thorax is 

 broadest. The punctured stripes on the elytra are the same 

 width as the shining intervals, the sutural one is lightly im- 

 pressed ; each puncture is furnished with a minute whitish 

 fccale, but these scales are only visible in certain lights. 



Seericornia. 

 Elateridae. 



Heterocrepidius Macconnelli ^ sp. n. 



Elongatus, angustus, niger, nitidus ; capite crebre punctate, fronts 

 leviter biimpressa ; thoraee sat elongato, antice bene angustato, 

 crebre subtiliter punctate, lateribus fere rectis (laevissime bi- 

 sinuatis), angulis posticis carinatis ; elytris basi thoraee vix 

 latioribus, postice gradatim angustatis, sat fortiter punctato- 

 striatis, interstitiis sat crebre subtiliter punctulatis, apice leviter 

 impresso ; tarsis apice piceo-rufis. 



Long. 4, lat. I5 lin. 



Hah. Mount Roraima, 8500 feet. 



This insect has very much the appearance of a very small 

 black Melanotus rujipes. It is clothed with nearly black 

 pubescence, which is very conspicuous at the margins. The 

 antennae are slender, the third joint only a trifle longer than 

 the globose second, the terminal joints almost linear. The 

 epistome and front part of the head densely and finely 

 punctured ; the forehead has the punctures rather larger, very 

 distinct, and slightly separated from each other. The eyes 

 project only very slightly. The thorax is considerably 

 narrowed from the base to the front, with the sides almost 

 straight ; the punctuation is fine, finer than on the forehead, 

 and less sharply defined, the punctures slightly separated 



