316 Mr. W. F. H. BlandfovJ on 



have been identified with described forms ; the remauiing 

 species, with the exception of one or two of doubtful cha- 

 racter, I now describe. Two are referred to new monotypic 

 genera, one of which, CraniodicticuSj is interesting and of 

 doubtful relationship. 



Previous descriptions of Ceylonese ScolytidfB are due 

 chiefly to Motschulsky and Walker. Those of the former 

 author, though drawn up with some care, do not always indi- 

 cate the essential diagnostic points, so as to form a reliable 

 guide to identification. Those of Walker are, of course, 

 useless, but his types are in the British Museum collection 

 and a short account of them may be of service. Under the 

 head of Tomicida3 he describes fourteen species (Ann. Nat. 

 Hist. (3) iii. pp. 260, 261). Of these Apate suhmedia^ 

 Bostrichus mutilatus, B. vei-tens, and B, moderatus are Bos- 

 trychidaj. Bostrichus testaceus and exiguus belong to the 

 genus XijJeborus. Platypus minax has been placed by 

 Chapuis in Crossotarsus ; P. solidus and latijinis are true 

 Plati/pi. Hylurgus determinans is a Cossonid, Hylurgus 

 concinnulus a Phloeosinus. Hylesinus carvifer belongs to 

 Diamerus^ Er. {Acantkurus, Eichh.). This species is also 

 found in the Andaman Islands, and is probably the same as 

 one of the two described by EichhofF from Sumatra. Byie- 

 sinus despectus is a true Uylesinus^Sind Hylesinus? irresolutas 

 is an Anthribid. 



The following is a list of the species taken by Mr. Lewis: — 



*Cmniodicticus mucronatus, gen. *Xyleborus indicus, Eichh. 



et sp. n. * iuterjectus, Blundf. 



Hylesinus despectus, Walk. * seminiteus, sp. n. 



Phloeosinus detersus, Chap. perforans, Woll. 



*Cryphalus vestitus, sp. n. parvulus, Eichh. 



* fuliginosus, sp. n. * dentatus, sp. n. 



*Cosmoderes monilicollis, Eichh. Eccoptopterus sex-spinosus, 



*Scolytomimus dilutus, gen. et Motsch. 



sp. n. *Crossotarsus Sauudersi, Chap 



*Dryocoetes flavicornis, sp. n. veuustus, Chap. 



(*Xyleborus Lewisi, Blandf.) Platypus solidus, Walk. 



* — — asperatus, sp. n. latifinis, Walk. 



fornicatus, Eichh. * uncinatus, sp. n. 



• obliquecauda, Motsch. 



The species indicated with an asterisk have not been pre- 

 viously recorded from the island. X. Lewisi was not taken 

 by Mr. Lewis, but is inserted on the autiiority of an example 

 in the collection of the liev. H. S. Gorham. Two or three 

 undetermined species of Cryphcdus and one of Hy pothenemus 

 are omitted. 



