(258) 



wliich borders the triangular a[)ioaI depression rnns straight to the eye, bounding 

 tlie median groove of the rostinni. The stnurtnre of the ))rosternum is also 

 eharacleristie, as stated in Nod. /.ool. 1894, p. ."lO.s. In the S the bottom of the 

 median cavity is longitudinally raised to some extent, so that there is a double 

 inijircssion in medium-sized iS ; and the transverse fold present in front of the 

 eiixao in small c? c? is much less distinct than in the allied species. The species 

 was originally described from a i>air labelled " P.orneo." The exainitles came from 

 Boncard's collection, and the locality is i)resnmably erroneous. Whitehead collected 

 a long series on Samar. 



'Z. Mecocerus philippinensis .lord. (IHit;')). 



Manila ; 1 <?. 



]\1ind()ro(Dr. Platen); 1 ?. 



" I'hilippiiies" ; 1 c? and li ? ?. 



'I'he prosternal processes of the S are jilaced nearer to the anterior margin of 

 the prosternum than to the coxae. In small i i , in which the processes and the 

 cavity arc absent, as well as in the ? ? , the fold and transverse groove in front of 

 the coxae are less strongly developed than in the following species. The disc of 

 the pronotum is more strongly depressed tiian in tiic allied forms. 



:!. Mecocerus brevipennis Jord. (I8'.»4). 



Kina-Balu, North Borneo (J. Waier.^tradtJ ; 1 ?. 



Pangeralara, G. Dempo, Palembang, Sumatra, •jiHiii— Ijiioit ft., vii.-ix. 1890 

 (I. Z. Kunnegieter) ; 1 i . 



This species is recognised by the short elytra, the rather large scutellnm, 

 the deep sulcus of the frons, and the strongly developed cariuae and grooves of 

 the rostrum. 



4. Mecocerus wallacei Pasc. (1800). 



Doesonlanden, Borneo (C. AVahnes) ; 1 ?. 

 tSintang, Borneo; 1 6. 



5. Mecocerus gazella (lylh. (1833). 

 The commonest species in collections. 



Tja. Mecocerus gazella gazella Gylh. (1833). 

 This occurs in two forms which are so ditferent in colour that one might 

 almost mistake them for two distinct species. They occur together, and inter- 

 mediates appear to be rare. True ga^zella { = loiigicorms Gaede) is ashy grey with 

 very diffuse markings. The other form, which is the commoner one, is greyish 

 clay-colour with more distinct markings. 1 propose to call this second form 



f lutosus nov. (type : Tengger Mts.). 



A series of both forms in the van de Poll collection. 



f. lutosus : 



Tambora, Sumbawa (H. Frnhstorfer) ; 1 <?. Not previonsly recorded from 

 any place east of Java, 



I 



