SCOTT— COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 225 



large shallow punctures separated by rugte : segments 1 and 2 have a sharp median 

 longitudinal keel. Tarsal claws minute and equal. 



The variation appears to be very slight ; two specimens are yellow instead of pitchy 

 owing to immaturity. O. cameratus Schmidt, of which 1 have seen specimens from 

 S. India in the British Museum, has sculpture of the same general type as, but in details 

 very different from, that of 0. palmarum : the elytral keels of 0. cameratus are all 

 equally developed, and special apical carinse are absent. 



Loc. Seychelles. The specimens, of which I collected 106, were found only in the 

 endemic forests of Silhouette and Mahe, and exclusively in the moist humus hetiveen the 

 bases of the leaves of jyrecinctive species of palms and Pandamis* \ not between the 

 decayed outer leaves, but between the inner and living ones. By far the greater number 

 were taken from the palm Stevensonia grandifolia, 35 in one case being obtained from a 

 single tree : only a small number were found in the palm Verscliaffeltia splendida, only 2 

 in a Pandanus, and none in any other kind of tree but these three kinds. Possibly the 

 whole life-cycle takes place in the trees, for 4 very small Lamellicorn larvae found between 

 leaf-bases of a growing Stevensonia in the same place and on the same day as the "35 

 specimens from a single tree," must almost certainly belong to this species. Of the lOG 

 specimens, 99 are from Silhouette ; possibly this is due to several causes ; collecting in 

 Silhouette was done in the drier months of August and September, that in Mahe from 

 October to March. The following is a detailed list of the finds : 



Silhouette : from 5 different growing Stevensonia-^alms in damp forest near Mt Pot- 

 a-eau, 1500 — 2000 ft., VIII. 1908, 8 specimens; from felled Verschaffeltia in forest just 

 above Mare aux Cochons, 26. VIII. 1908, 1 specimen; from two heads of a growing 

 Pandanus sechellarum, forest above Mare aux Cochons, 22. IX. 1908, 2 specimens; from 

 a single growing Stevensonia, same place and day as preceding, 35 specimens ; liom 

 another growing Stevensonia, same part of forest, 24. IX. 1908, 25 specimens; from 

 various other palms [Stevensonia or Verschaffeltia), forest above Mare aux Cochons, 

 28 specimens. 



Mah4 : from a growing Verschaffeltia near Morne Blanc, about 800 ft., 19. XL 1908, 

 1 specimen ; from a palm (either Stevensonia or Verschaffeltia) in Cascade forest, II. 1909, 

 1 specimen ; from a large Stevensonia in Cascade forest, 29. XII. 1908, 5 specimens. 



At^nius Harold, Coleopt. Hefte, li. 1867, p. 100. 



6. AtcBnius lodoicete, sp. nov. (PI. 12, fig. 2). 



Piceus, antennis pedibusque ferrugineis, subopacus ; capite dense sul)tiliter parum 

 subrugose, ad marginem anteriorem sat obsolete, punctato ; prothorace den.se subtiliter 

 parum subrugose punctato ; elytro singulo 8-carinato, carinis sat elevatis, interstitiis 

 regulariter punctatis subtilissimeque rugulosis, ad apicem carina in interstitio (ixterno 

 abrupte elevata, ultra marginem elytri prominente. Long. corp. circa 3 nnu. 



Head and thorax a little shining, elytra rather dull. Head densely and finely 



* For a list of the animals found between these leaf-bases see the writer's paper in Trans. Linn. Soc. 

 London, Ser. 2 (Zool.), vol. xiv, 1910, pp. 24 — .5 : and compare the ca.se of Copelatus pamlanomm, discus.sed on 

 pp. 2.")9, 200 of tiie present paper. 



29—2 



