SCOTT— COLEOPTERA, LAMELLICORNIA AND ADEPHAGA 



239 



that of the M. aldabrensis before me from 10 — 13 mm. M. selika has the white markings 

 more numerous : in it the anterior marginal spot on the elytra is divided into two, and 

 there are 4 small spots on the disc of the thorax, as well as the 6 large marginal ones : in 

 most of the M, aldabrensis these 4 small spots are absent. In M. selika the head is more 

 densely punctured and the smooth space on the vertex much reduced or practically 

 absent ; the thoracic punctures are a little more numerous ; the ventral abdominal 

 segments have more numerous punctures in both sexes, and the close median grouping of 

 fine punctures in the $ is less marked : the pygidium is subcarinate in the middle and 

 slightly depressed on either side, while in M. aldabrensis the median elevation is often 

 slightly less marked. Alluaud in his " Liste Coleopt." in footnote (2) on p. 293, states 

 that M. aldabrensis might be a synonym of Oxythyrea clouei Blanchard : I have however 

 read Blanchard's description and seen specimens agreeing with it, and have no doubt 

 that 0. clouei is absolutely distinct. 



Log. Aldabra, Astove, Assumption, Cosmoledo, St Pierre, Providence (1). About 

 50 specimens: Aldabra, Esprit and Picard Islands, XII. 1908 and I. 1909 (Fryer); 

 Assumption, IX. 1908 (Fryer); Aldabra and Cosmoledo, 1907 (Thomasset). The specimens 

 from Astove and St Pierre, and one from Wasin Island (on the coast of Brit. E. Africa), 

 are in the British Museum. 



ADEPHAGA. 



*30 species of Adephaga are here enumerated from the islands visited by the Percy 

 Sladen Trust Expedition. 26 of these are actually represented in the collections formed 

 by the Expedition : one more {Hyjjolithus 2Jcivoninus) is doubtfully represented : while 

 the remaining 3 [Pentagonica mahena, Laccophilus addendus and Bidessiis peringueiji) 

 were found in the islands by previous collectors, but not by the Expedition. 17 species 

 were previously known, so that the list is now increased by 13 species, 4 of which are new 

 to science. The 30 species are representative of 20 genera. The Cicindelida3 are repre- 

 sented by two distinct forms of a single species of Cicindela : the Carabidae by 1 3 species 

 belonging to 10 genera : and the Dytiscidse by 16 species belonging to 9 genera. 



Distribution within the area of the Expedition. 



As in the case of the Lamellicornia, I have adopted the form of a table to 

 demonstrate the " internal " distribution of the species. I would also again refer to those 

 characteristics which distinguish the Seychelles from all the other islands in question, and 

 which were briefly mentioned on p. 217. In the following table it has been necessary 

 to add a special column for the island of Coetivy : this is a small low island of coral- 

 formation, which lies close to the South of the Seychelles, but which does not stand on 

 the Seychelles Bank. 



* The number is actually 31, since in addition to those mentioned above, there is from Aldabra a single 

 specimen of a quite distinct kind of Carabida-. It is, however, in such bad praservation tiiat neither its species 

 nor its genus can be determined, and it is therefore left out of account in these introductory remarks. 



SECOND SERIES— ZOOLOGY, VOL. XV. 31 



