LACTICA SUMATRENSIS. 27 



Chalcolampra 18-guttata, Fabr. 



All the Sumatran specimens differ in the obscure rufous 

 colour of the head and thorax , black underside and larger 

 size. In other respects they agree with the Australian 

 forms. 



The collection before me contains eight specimens, capt- 

 ured at Sidjoendjoeng and at Soeroelangoen (Sumatra- 

 Expedition). 



l£nlticin,€te. 



Lactica sumatrensis , n. sp. 



Ovate, black below. Above dark bluish green. Clypeus 

 and base of the antennae fulvous. Thorax impunctate. 

 Elytra very finely and closely punctured. — Length ^/j — 1 

 line. 



Head impunctate, the frontal tubercles very flat and 

 indistinct ; carina elongate , the latter as well as the cly- 

 peus fulvous. Antennae rather robust, the second and 

 the two following joints of nearly equal length , four basal 

 joints fulvous, the rest black, thickened and pubescent. 

 Thorax transversely subquadrate , sides slightly rounded , 

 the anterior angles somewhat thickened and oblique , sur- 

 face convex , entirely impunctate , the basilar groove distinct 

 and limited at each side by a longitudinal depression , 

 posterior margin much rounded and produced at the middle. 

 Scutellum broadly triangular. Elytra very finely and closely 

 punctate-striate , the apex nearly impunctate, of a dark 

 bluish green like the rest of the upper surface. Legs 

 piceous, sometimes more or less mixed with dark fulvous. 



Seven specimens from the District of .Rawas (Sumatra- 

 Expedition) , one specimen from Boenga mas (I. C. van 

 Hasselt). 



Easily distinguished by its small size , the fulvous clypeus 

 and dark bluish colour. 



Notes from tlie Ley den IMuseum , Vol. VI. 



