of the Royal Physical Society. 307 



sions ; an irregular depression lies in the margin just behind the 

 labrmn, which, as in the other species of this genus, is small 

 and transverse, rounded on the sides, and toothed in the centre; 

 a very large and prominent projection behind the eye encroaches 

 on the posterior half of it ; a few scattered, very faint punctures 

 aud wrinkles may be seen about the vertex ; the back part of 

 the head below is irregularly and pretty closely punctate ; men- 

 turn very concave ; middle part with a deep rounded hole 

 (about the size of a pin's head) on each side of the middle ridge, 

 which forms the apex of the middle tooth ; a double line (connected 

 here and there) runs up the middle of the back part of the head, 

 terminating in front in two punctures; one puncture, or two 

 combined into one, lies immediately behind the posterior angles 

 of the mentum. Thorax transverse, twice as broad as long (taking 

 the measurement of the breadth at the widest, and of the length 

 at the middle), sloping gently from the anterior angles to the fold 

 or tooth on the margin, and rapidly from thence to the base ; 

 dorsal line distinct to the anterior marginal line, which is faint ; 

 space along that line marked with short, faint, longitudinal 

 lines or folds ; projection of prosternum smooth and rounded, 

 sometimes slightly depressed in the middle, with traces of three 

 faint lines behind, the two marginal ones diverging outwards. 

 Scutellum situated on the peduncle, basal portion somewhat ru- 

 gose ; prescutellar space coarsely rugose, except in front and on 

 the sides, where it is smooth. Elytra elongate, a little more than 

 three times the length of the thorax, subparallel and subquadrate, 

 margined, the margin dilated a little behind the middle, faintly 

 punctate-striate, the base and margins covered with small papillae ; 

 three impressions on the third stria, the first about a third from 

 the base, the next rather more than a third from the apex, and 

 the last between this and the apex, but furthest from the latter ; a 

 ridge runs along the base to the shoulder, and terminates in a pro- 

 minent tooth; it is not greatly curved, and just within the tooth a 

 ridge commences, running nearly parallel to the sides of the elytra, 

 but sloping a little inwards; it has a scarcely perceptible sinuation 

 near the base, and disappears before it reaches the apex ; traces 

 of a row of punctures inside this ridge are visible near the base, 

 and the stria next to it is the deepest. Under side shining ; one 

 distinct puncture on the posterior coxae, also two punctures on 

 each segment of the abdomen, one on each side of the middle, 

 besides shallow depressions along the sides, and transverse 

 wrinkles more or less distinct ; the last segment has also an- 

 other puncture on the margin, a little exterior to the other two ; 

 anterior tibiae tridentate, without denticulations behind; under 

 side of the palmate portion with a number of papillae or small 



