60 ENHYDRUS AENESCENS. 



gin SO as to form a tooth, further on they are transversely trun- 

 cated , the angles not blunted , the outer one obtuse , the in- 

 ner or sutural-one rectangular. Laterally the elytra are pro- 

 vided vrith three grooves of a sericeous bronze color of 

 which the outer one is entire , the second abbreviated at 

 a short distance before the apex and the third marked only 

 at the base ; sometimes there are almost imperceptible tra- 

 ces of other grooves. The anterior tibia of the male is 

 straight, triangular, with the outer apical angle in the 

 shape of a short tooth which is curved outwards. 



Very closely allied to Enhydrus venator Boisd. from which 

 it differs especially by the more ventricose and more con- 

 vex shape, by the more distinct grooves of the elytra of 

 which the third however is very short instead of being 

 almost entire, by the outer angle of the truncation being 

 obtuse instead of acute, and finally by the shape of the 

 male tibiae which are straight and triangular instead of 

 attenuated at the base. 



Hab. Sumbawa (van Lansberge). — A single specimen. 



2. Enhydrihs aenescens , sp. n. 



Long 10 — 11 mm. — Ovalis, paululum elougatus, an- 

 tice ac postice parum attenuatus, depressiusculus ; supra 

 viridi-aenescens , nitidulus; infra nigro-piceus , pedibus in- 

 termediis ac posticis rufis , femoribus infuscatis ; elytris le- 

 viter et remote trausversim striolatis , sulcis quatuor sericeo- 

 viridibus extus notatis, ante apicem leviter emarginato- 

 dentatis , postice truncatis, angulis rectis, hand deletis. cf 

 tibiis anticis angulo externo apicali prominulo. 



Of a somewhat elongate oval shape, slightly attenuated 

 at both ends. Uppersurface of the body depressed, of a 

 greenish bronze, especially on the sides ; undersurface black , 

 often ferrugineous black ; anterior legs blackish brown , the 

 middle- and hind-legs red with the femur infuscate; some- 

 times the abdominal segments are reddish posteriorly. Ely- 

 tra besprinkled with short transverse very fine and distant 



JNotes from the Ley den M.useuua, Vol. IV. 



