14 Mr. J. O. Westwood on the ChakididcB. 



rum, notwithstanding it had seven years previously been corrected by the 

 latter author in the Rgene Animal ; consequently we have the genus Ibalia 

 in the family miscalled by him Diplolepidse* instead of Cynipidae, and 

 the parasitic genera Eulophus, Perilampus, &c., in that of Cynipidse in- 

 stead of Chalcididse. 



No. 3. 



Having thus, I hope, satisfactorily established the claim of this minute 

 and splendid family of parasites to the title of Chalcididse, and also pre- 

 sented the student with a tolerably accurate historical view of the family, 

 I shall now proceed to the investigation of the characters, &c., of one of its 

 numerous genera, Cleonymus of Latreille, in the course of which it vnW 

 be necessary, 1st. to ascertain its actual type ; 2nd. to give the generic 

 characters of that type ; and 3rd. to exhibit the degrees of relationship of 

 the genus with contiguous genera, as well as with those insects which, 

 from their possessing certain characters in common, have either been 

 actually placed in it by the authors who have treated upon the subject, or 

 which might perhaps be considered as congenerous. 



Spinola appears to be the first author who separated the insects of the 

 genus Cleonymus from the family group ; since the divisions proposed by 

 Latreille in the 3rd and 13th volumes of the Histoire Naturelle &c., were 

 not sufficiently precise. The former author, in the 2nd volume of his 

 Insecta Ligurise, published in 1806, gave a valuable sectional table of the 

 family, under the generic name Diplolepis, and we find amongst the 

 characters of his third division the abdomen described as subsessile, 

 elongated, and sharpened at the apex, Avith distinct segments, the ter- 

 minal joints of the antennse seldom forming a club, and the thorax 

 with the first segment small, narrowed and elongated. The species given 

 as types of this third division are Dipl. depressa. Fab. ; D. bicolorata, 

 Spin. ; and Ichn. nigricornutus, Christ. 



* Mr. Curtis refers these genera respectively to the families Diplolepidae of 

 Latreille and Leach, and Cynipsidae [Cynipidse] of Latr, and Leach; but I 

 find cannot that Latreille in any of his works has adopted our uniform termina- 

 tions in idas, his names for these two families being: in his former works 

 " Diplolepaires, Diplolepariae;" and " Cynipseres, Cynipsera." 



