DELOCEPHALA. 67 



development of the head in the male and the elongate 

 anterior legs. The genus greatly resembles Chalcenus West- 

 wood amoDgst the Halticinae, especially in the structure of 

 the antennae, but the absence of any incrassation of the 

 posterior femora and the abnormal shape of the head pre- 

 vents the insect of being classified in that genus. 



Delocephala apicicornis , n. sp. 



Bluish black below. Legs and antennae piceous, the 5 

 last joints of the latter testaceous. Head and thorax 

 obscure bluish black. Elytra purplish blue, closely rugose- 

 punctate. — Length 3 lines. 



cf. Head very broad, distinctly broader than long, im- 

 punctate ; face flattened , triangular. Antennae two-thirds 

 the length of the body, first joint very elongate, slender 

 and thickened at the apex only , second joint short , third 

 one elongate, the rest gradually decreasing in length and 

 pubescent, 6 lower joints piceous, the rest pale testaceous. 

 Thorax three times as broad as long, narrowed at the 

 base , the anterior angles not very acute , surface im- 

 punctate, blackish blue. Scutellum black, its apex broadly 

 rounded. Elytra of a purplish blue colour, their surface 

 finely transversely rugose and the interstices punctured , 

 the base not depressed. Legs piceous , their coxae obscure 

 fulvous. 



9. Head and legs of normal size, third joint of the 

 antennae shorter than in the male, in all other respects 

 resembling the latter sex. 



Three specimens (one male and two females) from Lebong 

 (Sumatra-Expedition). 



Sumatrasia, nov. gen. (Sect. Mimastrinae). 



Body elongate, glabrous above. Head transversely groo- 

 ved; frontal tubercles and carina distinct. Eyes regularly 



Notes from the Leyden JMuseuxu, "Vol. VI. 



