THE CANADIAN ENTOMOLOGIST. 85 



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equal, our insect belongs to Microclytus. The generic sequence followed 

 in succeeding pages is the same as that employed in the table and is 

 hence slightly different from the Henshaw Check-list. 



Table of Genera of sub-family CerambyciN/E. 



Base of antennse not enveloped by the eyes 2. 



Base of antennae partially enveloped by the eyes 12. 



2. Front coxfe transverse, not prominent ( Callidioides) 3. 



Front coxae conical, prominent ( Lepturoides) 37. 



3. Eyes divided, apparently four in number Tefropium. 



Eyes not divided, often deeply emarginate 4. 



4. Brown species, second antennal joint proportionately larger, often 



halfaslongas the third and sometimes twice as long as wide. 



Elytral costte usually distinct 5. 



Variously coloured, often ornate species, second antennal joint pro- 

 portionately smaller, often much less than half the length of the 

 third and never much longer than wide. Elytral costie usually 

 indistinct 6. 



5. Eyes hairy, finely granulated Asemutn. 



Eyes not hairy, coarsely granulated Criocephalus. 



6. Elytra with narrow raised white lines, prothorax with very deep 



median groove, thighs strongly clubbed Physoaienmm. 



Elytra without distinct raised white lines (traces are sometimes visible 

 in Meriuni) 7. 



7. Prothorax very short, strongly rounded on the sides. Upper surface 



entirely opaque, lustreless. Black, prothorax red. . . . Rhopalopus. 



Prothorax not very short, the width not apparently much exceeding 



the length. Upper surface at least moderately shining 8. 



8. Thighs more sleqder ; antennae with the eleventh joint divided in the 



male. Colour above blackish, prothorax red Gonocalhis. 



Thighs strongly clubbed, colour variable 9. 



9. Anterior cox^e contiguous 10. 



Anterior coxae at least moderately distant 11. 



10. Palpi unequal, the labial much the shorter Phymatodes. 



Palpi about equal Callidium. 



IT. Dorsal surface of prothorax with narrow median and moderate or 



small lateral callosities Hylotrupes. 



Dorsal surface of prothorax with a very broad, smooth, shining median 

 space, which bears a few large punctures. Elytra with more or less 

 distinct raised lines of a yellowish or whitish colour Mgrium, 



