BY E, W. FERGUSON. 95 



Group X. — Size small, elytra with strong tubercles on third and 

 fifth interstices, few or none on second, fourth and sixth ; 

 internal ridges short, prominent. 



101. (102)Grranules subtending strial punctures definite 



T. incanescens Macl. 



102. (lOl)Such granules hardly, if at all, traceable 



var. muricatus Macl. 



Group xi. — Size small, clothing dense, internal rostral ridges more 

 prominent than external, prothorax dilated and angulate 

 in middle on sides ; elytra with tubercles hardly traceable, 

 except along edge of declivity T. scaber Boisd. 



Group xii. — Size large or moderately large; rostrum very short, 

 elytral sculpture of small ti;bercles or coarse granules 

 more or less regularly disposed. 



103. (llO)Internal ridges obsolete. 



104. (107)Elytral granules comparatively equal in all interstices. 



105. (106)Size large T. ccqualis SI. 



106. (lOo)Size moderate T. HeJmsi SI. 



107. (104)Elytral granules on third interstice duplicated, rather 



smaller, and more numerous than on second and fourth. 



108. (109)Granules on second interstice separated by intervals 



nearly equal to the length of a granule T. solidus SI. 



109. (108)Granules closer together^ rather smaller...!/'. n'ouJaris S\. 



110. (103)Internal ridges present, though not prominent, tibise 



notched T. rufipes Bl. 



Group xiii.. — Species moderate in size, but of a short stout form, 

 with apex of elytra strongly rounded, apex of abdomen 

 excavate, with a small tubercle on either side. 



111. (116)Third elytral interstice granulate or tuberculate. 



112. (11.5)Second interstice tuberculate. 



113. (114)Abdominal tubercles nearer to sides than to each other... 



T. morhillosus Boisd. 



114. (113) Abdominal tubercles equidistant from sides and each 



other T. orthodoxus Lea. 



115. (112)Second interstice not tuberculate T. M-elevatvs Lea. 



116. (lll)Third elytral interstice subcostate at base 



T. melancholicus Lea. 



Section C. : Costati. — Elytra costate, each elytron having four 

 distinct costse (including suture), stride foveate. 

 Group xiv. — Species large, sublateral stria consisting of a double 

 row of fovese, 



