Genera of the Cossonida. 571 



(though particularly the front ones) being more approxi- 

 mate. Its antennas (which are implanted before the middle 

 of the rostrum) are rather thick, with their scape slightly 

 abbreviated, and their funiculus (the second joint of which 

 is but very little longer than those which follow it) to- 

 lerably compact, though not so compact as in Stereo- 

 tribus. 



The genus seems to be peculiar (so far as I am aware) 

 to the islands of the Malayan archipelago, the specimens 

 now before me (from the collections of Mr. Fry and 

 Mr. Pascoe) having been captured by Mr. Wallace at 

 Dorey in New Guinea, and in the islands of Gilolo and 

 Matabello. 



89. STEREOTRIBUS (nov. genJ). The members of the 

 present group are very closely allied, in external aspect 

 and general structure, to those of the preceding one, 

 from which they seem mainly to differ in their head being 

 a little less widened, and their rostrum (which in the 

 S. incisus and tuber culifrons, from Ceylon, is rather 

 longer, and distinctly narrowed towards the base) being 

 not only furnished behind with a very deep, short, wide, 

 and somewhat gaping slit, or (as it were) gash (often ac- 

 companied by posterior frontal tubercles and inequalities), 

 which takes the place of the narrow channel in Stereolorus, 

 but likewise more or less bearded beneath, at the apex, 

 with elongated hairs. Their eyes, too, are a little more 

 prominent ; their funiculus (the second joint of which is 

 not at all longer than those which follow it) is more solid, 

 o"r compact ; and the additional lamelliform process which 

 augments the inner edge of the two front tibias is armed at 

 its base with a very conspicuous and robust spine (which 

 is best seen when the insect is viewed obliquely and from 

 behind}. Like that genus, it is widely spread over the 

 islands of the Malayan archipelago, examples, obtained 

 by Mr. Wallace in Batchian and Tondano, having been 

 communicated to me by Mr. Pascoe; and it appears to 

 range eastward, in however a slightly modified form (as 

 witnessed by its somewhat longer and more posteriorly- 

 narrowed rostrum, and its more developed club), to at all 

 events Ceylon from whence several individuals (repre- 

 senting my S. incisus and tuber culifrons) are now before 

 me from the collection of Mr. Fry. 



I have thought it desirable to append a subgeneric title 



TRANS. ENT. SOC. 1873. PART IV. (OCT.) S S 



