BY E. W. FERGUSON. 97 



Group xvii. — Anomalous Species. 

 Section Foreati : Size moderate, 6 subcylindrical, ? more ovate ; ros- 

 trum little excavatBj not greatly dilated on sides, inter- 

 nal ridges subparallel. Eyes set well down on head. 

 Scrobes curved. Elytra foveate T. angastatus Macl. 



Group xviii. — Size small ; rostrum not dilatate, eyes set high in 

 head, scrobes straight. Elytra with small foveiform punc- 

 tures, interstices not raised T. prypnoides, n.sp. 



Group xix. — Size moderate; rostrum narrow across ridges, widely 

 dilatate oji sides. Eyes round, set low. Scrobes curved ... 



T. capita, Pasc. 



Group XX. — Size large; rostrum hardly excavate; prothorax very 

 finely granulate ; tibite, especially posterior, strongly 

 fringed with hair in 6 ■ 



139. (140)Int€rstices second, fourth and sixth absent or represented 



by a few granules, the others little raised, costiform, seti- 

 gerous T. (ilmhiguus Macl., T. dubiiis Macl. 



140. (139)A11 interstices equal, with depressed granules, hardly 



costate T. liayneri Macl. 



t^otes on Table. — The numbers in brackets represent the lines in 

 antithesis to those represented by the numbers outside the brac- 

 kets. 



e.g., 1(34) Internal rostral ridges well defined. 

 34(1) Internal rostral ridges obsolete. 



The intervening lines are all governed by the preceding, until 

 the number in antithesis is reached. 



I have tried to simplify the table by grouping the species, at the 

 same adhering, as far as possible, to Macleay's Sections. These 

 groups must, though most of them fairly natural, be regarded as 

 only tentative, and subject to revision as our knowledge of the 

 genus increases. 



Group i. — The smaller species, e.g., T. parvus, T. clavicornis, 

 etc.. should perhaps be separated. 



Groups ii. and iv. might perhaps be merged, or Group iv. further 

 subdivided. 



Group vii. — T. caviceps does not seem much at home here; the 

 rostrum would exclude it from Group xii. 



Group ix. — I have not ventured to tabulate the species of this 

 very definite and diflScult group, pending determination of T. 

 semispinosiis and T. pastiUarius. 



Groups xvii., xviii., and xix. seem close, and yet differ in some 

 essentials ; they are all represented by single species. 



