118 Christmas Island, 



apex ; ninth interstice yellow from the base almost up to the apex ; 

 the anterior part of this interstice is common to it with the tenth, 

 and the latter is yellow for a short distance back from the point of 

 junction with the ninth. 



9 . Head obsoletely or not at all tuberculate behind ; prothorax 

 scarcely longer by one-half than its greatest breadth, and rather 

 less than two-thirds of the length of the elytra. Differs also from 

 the male in the shape of the head, the unarmed anterior tibiae, etc. 



Dr. Angelo Senna, who has a considerable acquaintance with the 

 beetles of this family, has very kindly examined some specimens' 

 of this species, and has told me that they are quite new to him, 

 and the species distinct from any other described, I have to 

 thank him also for pointing out some of the most important 

 characters detailed above. The new species must be placed in the- 

 group of 0. serrirostris, Pab. 



Family A^THRTBID^. 



74. Xenocerus nativitatis, Gahan, sp.n. 



X. flagellato affinis sed differt capite supra inter oculos, pygidioy 

 et utriusque elytri interstitio nono fulvescentibus, elytris magis! 

 fortiter punctatis, antennis omnino nigris. 



Long. 13, lat. 4 mm. 



This species comes nearest to X. Jlagellatus, Fahr., and X. en- 

 ganensis, Jordan, from both of which it differs in having the upper 

 part of the head between the eyes, the pygidium, and the ninth 

 interstice of each elytron of a tawny colour ; the two lateral vittse 

 on the pronotum also have a tendency to be of the same tawny 

 colour; the elytra are a little more strongly punctured, and the 

 white markings somewhat different. The latter consist of (1) a 

 narrow sutural band reaching from the base to the middle, behind 

 which it joins two short diverging bands placed one on each elytron 

 between the suture and the third row of punctures; (2) a basal 

 spot just within the shoulder, and continued behind as a narrow 

 vitta, which runs slightly inwards to end in the fourth interspace 

 a short distance before the middle ; (3) a spot on the seventh 

 interspace and a narrow spot on the tenth at about one-third of the 

 length of each elytron from the apex; and (4) a spot close to 

 the apex. 



Xenocerus Jiagellatus, Fahr., to which X. enganensis, Jord., is 

 very closely allied, is, according to Dr. Jordan, very widely 

 distributed in the Indo- Australian Archipelago. 



75. Litocerus jordani, Gahan, sp.n. 



L. plagiato (Jordan) ajBOinis sed differt : prothorace breviore, vitta 

 mediana pronoti in medio angustata, area luteo-ochraceo-tomentosa 

 elytrorum minus extensa, sed striis elytrorum etiam luteis. 



