4.'U Prof. Clir. Auiivillius on 



joints of the antcnnfe also oPtpu darkoned ; body above with 

 short erect hairs ; joints 2-6 of the antenna? distinctly 

 ciliated below ; body with a very fine greyish pubescence ; 

 eyes broadly distant ; head, with the eyes, broader than the 

 prothorax, impunctate, with a short fine furrow between 

 the antenine ; the antennre longer tliau the body in both 

 sexes, their first joint obconic, slightly curved, the tiiird 

 joint as long as the fourth, but shorter thati the first and the 

 fiftii ; prothorax longer than broad, much more narrowed at 

 base than at apex, obtusely protuberant on each side a little 

 before the middle (more so in the female than in the male), 

 its upper side depressed, nearly flat, with the usual elevations 

 nearly obsolete; soutellum small, narrow; elytra parallel- 

 sided, somewhat dehiscent and separately rounded at apex, 

 punctured from base to or somewhat beyond the middle, 

 the punctures arranged in longitudinal rows, the apical half 

 nearly impunctate ; the dark lateral stripe is more or less 

 dilated at the base and behind, and is connected in the 

 middle with a discal spot, which does not always reach the 

 suture; epipleural margin sometimes, and extreme apex 

 always, pale ; legs testaceous, hind femora not reaching the 

 apex of the elytra. Length 5-6"5 mm. 



Loc. Seychelles, Mahe : Mare aux Cochons district, 1500 

 feet, 26. i.-2. ii. 1909, 7 cJ , 8 ? , beaten from trees of endemic 

 " Bois de fer " ( Valeria Seychellarum) ^. 



This species is somewhat varial)le in colour and the 

 antenuje of the male often have joints 5-11 dark fuscous ; 

 rarely the club of the hind femora is also darkened. 



In all the species of Idobrium the suture of the elytra is 

 longitudinally impressed at the base behind the scutellum, 

 forming a longer or shorter groove, which is best developed 

 in Idobrium mug num. 



Key to the Species of Idobrium. 



A. The punctures of the elytra not arranged ia 



loiiiritudinal rows. 



a. Prothorax not longer than broad, slightly con- 



stricted at base. Length 13 mm 1. /. maynum, 



b. Prothorax longer than broad, strongly narrowed 



at the base. Length about 6 mm 2. J. voeltzkowi. 



B. The punctures of the elytra arranged in longi- 



tudinal rows from base to middle or somewhat 

 bpyond middle. 

 a. I'rothorax strongly constricted at base, sub- 



* See also under Obrium yiitidicoUe and Microiioemia bifasciuta. 



