98 CERAMBYCIDJE. 



punctate, the narrow interstices minutely punctulate ; faintly- 

 pubescent ; each with a short sutural spine at the apex, fur- 

 nished with two feeble dorsal costge and a short faint lateral 

 one. Prosternum gradually sloping in front of the coxae, trans- 

 versely rugulose, its front margin slightly raised, the intercoxal 

 process very narrow. Tarsi slender, the first joint in the hind 

 tarsus nearly as long as the rest united : the cleft of the third 

 extending to the base. 



Length 15-20^ ; breadth 4-5| mm. 



Hah. Assam: North Khasi Hills (Godivin- Austen). Japan: 

 Tsu Shi ma. 



This species enters into Sharp's genus Cephalalhis, and possibly 

 may not be really distinct from C. oherthtiri, Sharp, the type of that 

 genus, as it apparently differs only in colour, as the latter is 

 described as pieeous with the elytra ferruginous. Cephalalhis, 

 Cephalocrh's and Megasemxtm are distinguishable by such slight 

 structui'al characters that I consider them at most as only sub- 

 genera of Criocephalus. 



Group (EMINI. 



Head vertical or 'subvertical in front; the clypeus as a rule 

 very short ; gula without mentigerous process ; ligula corneous ; 

 eyes deeply emarginate, sometimes completely divided ; antennae 

 much longer than the body in the c^ • Prothorax sometimes 

 tuberculate or spined at the sides, but more often unarmed. 

 Elytra generally long. Front coxae moi'e or less prominent, their 

 acetabula angulated on the outer side and open posteriorly; the 

 intercoxal process narrow antl not dilated at the end. Acetabula 

 of the middle coxie extending to the epimera. Wings M'ith vein 

 Cu 2 absent, and Cu 1 eitlier simple or bifurcated towards the 

 end. Stridulatory area of mesonotum usually large and well 

 developed and, except in one genus, not divided by a median line. 



Synopsis of the Genera. 



A. Front coxoe contiguous. 



a. Prothorax not wider iu middle than 



at each end; third antennal joint 

 shorter than fourth or any of the 

 succeeding joints Amimes, p. 99. 



b. Prothorax wider in middle than at 



each end ; third antennal joint not 

 shorter than fourth or succeeding 

 joints. 



a. Eyes completely divided ; prothorax 



without lobe at base Tetraommatus, p. 100. 



b. Eyes emarginate ; prothorax with 



median lobe at base Hypoescheus, p. 104. 



