Characters of the genus Cleonymus. 21 



positor appears to take its rise, and is apparently covered through its entire 

 length, except at its extreme tip, by a thin membrane,* which does not, 

 however, prevent its form being perceivable as represented in Fig. G. 

 Fig. I. represents a transverse section of the fifth segment of the abdomen 

 as exhibited in dried specimens, by which it will be seen that there is a 

 considerable space between the edges of the under side of the dorsal seg- 

 ments and the ovipositor (La.); this space I should conceive is, how- 

 ever, only found in dried, shrunk up specimens, and that when alive it 

 may perhaps be filled up by the inflation of the membrane. The Wings 

 do not exhibit any peculiar characters, the nervures being similar to those 

 of the generality of the family noticed below. The Legs are slender. 

 The posterior Cox<£ large, and the posterior Thighs rather thicker 

 than the anterior. The Tibia are slender, the four anterior with a single 

 spine at the apex and the posterior with two, the smallest of which is 

 double. The Tarsi are all 5-jointed, the basal joint being the longest. 

 Fig. F. represents a fore leg of the female. The peculiar formation of 

 the joints of the Tarsi is exhibited in this figure. 



Such then are the generic characters of Cleonymus, which it will be 

 seen differs from Mr. Curtis's Colax in many characters, more especially in 

 the formation of the antennae, collar, and in the general structure of the 

 abdomen. Other characters which I have noticed above will peculiarly 

 distinguish this genus from its affinities, and as yet I have not met with a 

 second species which will agree with the characters of the typical one. 

 Whether those which are referred to it by Latreille and Spinola, and 

 mentioned above, be or be not congenerous, I am not at present able to 

 decide ; I am inclined, however, to think that they are not. 



Spinola, in the Annales du Museum, Vol. XI. p. 149, has adopted the 

 genus Cleonymus, placing it in his section with twelve joints in the 

 antennae, inserted in the middle of the face, which has not any im- 

 pression for the reception of the basal joint, and giving for its charac- 

 ters, " Abdomen comprime et meme concave en dessus ; Fente ventrale 

 correspondante aux anneaux anterieures et tarriere depassant rarement 

 I'extremite de I'abdomen. Col acumine plus long et plus etroit que le 



* I think it not unlikely that I may have been misled as to this membrane 

 foT want of specimens to examine. 



