230 Mr. J. O. Westwood's Description of some 



tinct from Latreille's Pronceiis ; 3rd, that Jurlne's genus /4mj)vlex 

 is synonymous with Latreille's genus Chlorion. 



I am sorry that these conclusions will have the effect of sinking 

 the genus Ampulex, which .Turine must certainly have the credit 

 of having first clearly distinguished, and will be at variance with 

 the nomenclature of recent French Hymenopterologists.* 



There are several fine species of Chlorion in the cabinet of 

 the British Museum which I have not yet had an opportunity 

 of describing. I, however, take this occasion of describing a 

 congenerous insect in my own cabinet, which is by far the most 

 minute species I have yet seen of the genus, in addition to the 

 description of the two allied genera above characterized. 



Chlorion ci/anipes, Westw. 

 Parva nigro-cct'ndea, rude 2yunclata, mesothoracis dor so in medio hand 

 longiludinaliter impresso ; pedibus cyaneis $. 

 Long. Corp. lin. 3|, expans. alar. lin. 5|. 

 Habitat apud promontorium Bonsc Spei. 

 In Mus. nostr. 



* Since the preceding was written, the volume upon Insects in the Cabinet 

 Cyclopedia has been published, in which Mr. Shuckard expresses his surprise that 

 the Ampulicid(c should so long have been allowed to remain incorporaled with the 

 Sphegidce, as they present so many distinctive characters, instancing the formation 

 of the abdomen, the remarkably sculptured metathorax (which is stated to be 

 armed at its extremity with a couple of spines), the nose-like clypeus, and t!ie 

 formation of the penultimate joint of the tarsi. It is added that one genus of 

 them is found in all quarters of the world, and a genus from New Holland is 

 mentioned (by name only) Coiwcercus, which, like Dolichnrus, is of a black colour. 

 " Chlorion, distinguished for its metallic colours," is given as a genus belonging 

 to the next family, SpJicgidtc. 



I need not recapitulate the arguments I have already brought forward in the be- 

 ginning of this paper to prove that the insects above alluded to, as forming the types 

 of a distinct family, are entitled to the name of Chlorion and not to tliat of Ampulex. 

 Neither shall I make any further remark upon the proposed establishment of a 

 distinct family for these insects, than lliat the characters insisted on by Mr. 

 Shuckard occur only in the typical genus : Doliclnirns, Trirogma, and Aphelotoma, 

 the only other genera belonging to the group hitherto described scarcely possessing 

 more than one of the assigned characters, whilst that which is considered the 

 " most remarkable," namely, the form of the tarsi, occuis in none but the type. 

 Of their geographical range none have hitherto been described as inhabitants of 

 the New World. Of the New Holland genus, indicated by name only, I presume 

 from its name and locality that it is identical with my genus Aphelotoma. As, how- 

 ever, it had stood in my cabinet as a new genus for several years before it existed 

 in any other collection, I trust that my name and the very detailed description and 

 figure given of the insect at the last meeting of the Society, before even the name 

 Conocercus had appeared, will be received with the courtesy which is given to 

 memoirs read before scientific bodies. 



