442 Longicornia Malayana. 



than the triangular outline of the elytra. The bicarinate front 

 appears to be a good generic character and to distinguish the 

 genus from its allies ; the carinae are two raised vertical lines, and 

 occur between the eyes, one very strongly marked, incurved, in- 

 closing between them a concave oblong space, through which 

 passes the mesial groove ; in A. lessellafa, the carinae are nearly 

 united below. The elytra are also abruptly bent down at the 

 sides, in some species causing a sharp angle on the line of de- 

 flection. The coloration depends on densely pubescent lines or 

 spots, varying greatly in amount in the same species, lying on a 

 dark derm clothed with an extremely minute pubescence, only 

 visible under a good lens. 



Arsysia macula ta. 

 Trigonoptera niacu/ala, Perroud, lib. c'lt. p, 338. 



A. nigra, subnitida, lineis albis ornata ; elytris fascia alba ante- 

 raeiliana, apicibus sat late truncatis, angulo externo mucro- 

 nato. 



Hab.—Aru, Mysol. 



Black, subuitid, minutely pubescent, with stripes or lines of a 

 coarser and nearly pure white pubescence ; head with a line round 

 the eye, the mesial line, and clypeus white ; prothorax with two 

 stripes on each side, a line along the base, and sometimes a zig-zag 

 mark behind the middle of the disk ; scutellum nearlv semicir- 

 cular ; elytra with a band before the middle, sometimes inter- 

 ruj)ted at the suture, three or four broken lines, or spots, at the 

 base on each side ; in the freshest specimens, a line commencing 

 behind the band, then branching off' into three or four, two of 

 which unite lower down, in other spc cimens these lines are broken 

 up without any connexion between them ; the suture posteriorly 

 appears to be always finely bordered with white as far as the 

 band, apices rather broadly truncate, the outer angle broadly 

 niucronate ; body beneath black, the sides of the abdominal seg- 

 ments and the episterna bordered with white ; legs and three or 

 four basal joints of the antennae covered with a fine greyish pile, 

 intermediate and posterior tibiae black on the outer edge of their 

 iij)ices. 



Length 6 — 8 lines. 



Arsysia binmculata. 

 Trigonoptera bimacitlnta, J. Thomson, Syst. Ctramb. p. 546. 

 A. nigra, subnitida, lineis albescentibus ornata; elytris maculis 



