On a new Coleopterous Insect. 229 



Molars comparatively small, broad, and rounded in section, 

 their enamel running almost completely round them, instead 

 of failing for a larger or smaller gap at their antero-external 

 and postero-internal corners. Last upper molar nearly half 

 the area in cross section of ?n^. 



Dimensions of type (measured in spirit) : — - 



Head and body 158 mlUira. ; tail 77 ; hind foot, s. u. 30, 

 c. u. 35. 



Skull: greatest length in middle line 42 ; basilar length 

 37'0; zygomatic breadth 26 ; interorbital breadth 85 ; least 

 breadth above bullce 17*2 ; greatest posterior breadth on 

 auditory meatus 26*2 ; palate length 20 ; diastema 12"3 ; 

 bulla, greatest length 15*5 ; breadth at right angles to the 

 greatest length, excluding meatus, 8' 8. 



fJoh. Sapucay, Paraguay. 



Type. Adult male, in spirit. Collected by Mr. W. Foster. 

 An imperfect skin also received. 



This species is most nearly allied to C. mendocinus, Phil., 

 of which topotypical specimens, collected by Mr, Bridges, are 

 in the British Museum, but differs by various cranial details, 

 of which the most obvious are the less cut out palate, the 

 larger bullae, and differently shaped teeth. 



Ctenomys Azarce is no doubt the Tuco-tuco whose history 

 is given in Azara's famous work on the Mammals cf Para- 

 guay; and it is with the greatest pleasure that I take 

 this opportunity for naming a species in honour of that 

 naturalist, for whom I have always felt the most sincere 

 admiration. No one who has read his book, as 1 have 

 again and again, can fail to be attracted by his ciiaracter, 

 his naivete, and his genuine love of his subject, or to 

 admire the excellence and accuracy of his descriptions, 

 which, while innocent of technicalities, were better than any 

 others of his date, and indeed than many of those produced by 

 technical zoologists for half a century later. 



XXVI I. — Description of a new Coleopterous Insect belonging 

 to the Curculionid^e. By Charles 0. Waterhouse 

 F.E.S. ' 



A SHORT time ago I received from Mr. G. H. Carpenter of 

 the Science and Art Museum, Dublin, some weevils which 

 were injurious to ferns in greenhouses. Whence these insects 

 came is not known, but they belong to the genus Syajrius of 



