255 



290. Perissus laetus, Lameere, Ann. Soc. Ent. Fr. 1893, p. 283. 



Periss-us proprius, Gahan, Ann. Mus. Civ. Genova, xxxiv, p. 21 

 (1804). 



c? . Black ; head and prothorax faintly covered with grey 

 pubescence, the prothorax with two black spots or a single large 

 transverse one on the middle of the disc ; scute] him black, bordered 

 with ashy grey. Elytra blackish brown, marked with ashy-grey 

 bands ; the first band crosses at the base from the scutellum to the 

 humeral depression, and is there turned slightly backwards ; the 

 second begins at the suture a little behind the scutellum, diverges 

 from the suture as it passes backwards for some distance, then 

 curves round and takes an anterior and outward direction, where 

 it is again sharply bent backwards just before it reaches the outer 

 margin ; the third band is placed just behind the middle, it is 

 narrow and slightly oblique in its outer half, produced in an angle 

 both anteriorly and posteriorly at the suture ; the fourth is a 

 rather broad, somewhat oblique band placed at the apex. Body 

 beneath closely covered with ashy-white pubescence ; legs black, 

 faintly covered with grey pubescence. Prothorax rounded at the 

 sides, widest just behind the middle ; strongly but rather sparsely 

 asperate above. Antennae reach a little past the middle of the 

 elytra. The hind femora extend past the apex of the elytra by 

 nearly one-third of their length. 



5 . Elytral bands similar in form and position to those of the c? , 

 but of a yellowish-grey instead of an ashy-grey colour. Prothorax 

 with an ill-defined, slightly curved, longitudinal band of yellowish- 

 grey pubescence along each side of the disc. Antennae not reaching 

 to the middle of the elytra. The hind femora are more slender 

 than in the rf and extend only a little past the apex of the elytra. 



The single specimen described by Lameere has the elytral bands 

 coloured as in the , and has also two yellowish-grey bands on 

 the prothorax. He may possibly have been mistaken in regarding 

 the type as a d ; but it is not very unusual to find specimens of 

 both sexes sometimes coloured alike in species where usually there 

 is a sexual difference in coloration. 



Length 9-11 ; breadth 2-3 mm. 



Hab. Assam: Patkai Mts. (Doherty) ; Tenasserim : Thagatd 

 (Fea) ; Siam ; Cambodia : Pnoinhpenh (Jfouhot). 



Yar. adhcerens. Agrees with the type in structure and colour, 

 but differs in the form of the second and third elytral bands. 

 The second band begins behind the scutellum, remains close to the 

 suture as it passes backwards, and becomes gradually wider poste- 

 riorly ; it then gives off a curved branch which follows the same 

 course as the corresponding band in the type ; the third band, that 

 behind the middle, is not dilated in the form of a triangle at the 

 suture, but is somewhat arcuate in shape, broader in the middle 

 and narrowed at the sides ; a very narrow sutural band extends 

 from it in front, and another posteriorly. 



