(Page 533) 

 Midule coxae contiguous 6. 



5. Pronotum with a single, sharp middle groove, without impression. 



Elytra with sharp sutural stripe and rounded— off sutural cor- 

 ners 92. Platystethus Mannh. 



Pronotum with three, as a rule distinct longitudinal grooves at 

 middle. Elytral sutural stripe feeble or obliterated. Sutural 

 corners angulate 93. Oxytelus Jravh. 



6. Maxillary papal last joint very small and spiculiform. Mandibles 



not far protruding. Pronotum transverse, with two arcuate im- 

 pressions on dorsum, separated by a narrow, smooth interval. 



94. Haploderus Steph. 



Maxillary palpal last joint longer than, and at base as thick as 

 the next-last. Mandibles long and far protruding. Pronotum 

 at least as long as broad 95. Planeustomus Duv. 



7. Head constricted behind. Mandibles long and very far protruding. 



96. Acrognathus Er» 



Head not constricted behind. Mandibles short, not far protruding; 

 97. Coprophilus Latr. 



8. Tarsi 3- or 2-jointed. Body narrow and abdomen narrowly margined. : 9. 

 Tarsi 5-jointed. Body short and broad (bronze-lustrous). Abdomen 



broadly and sharply side-margined ICO. Svntomlum Curt. 



9. Elytral sutural corners angulate, closed. ..98. Trogophloeus Mannh. 

 Elytral sutural corners obliquely rounded off, hians. (Species 



very small).... 99. Thinobius Kiesw. 



•7- 



