INTRODUCTORY REMARKS. 2^ 



definition (g), will well apply to this part. If con- 

 fined to the base of the jn axil I a it will do in some 

 cases, though not in all. The apex is usually 

 either plicatus, suhplicatus, or concave, so as to 

 embrace and defend the tongue. At any rate the 

 term is too obscure in its application, to be used as 

 an index to point to what class any individual 

 belongs. The last part of this character, s^cpe 

 elongata, is peculiar to ^pis, I mean that of Lin- 

 neus, and a very few other genera. 



These obsen-ations, I think, will make it evident 

 enough, that the characters, which Linneus has 

 fixed upon to denote this class, are far preferable 

 to those of Fabricius both for universality and 

 notoriety. 



I shall next proceed to notice the alterations 

 introduced by this author into the genera. To 

 those of Linneus he has added twenty-two. The 

 whole are thus arranged : Cynips, Tenthredo, Sir ex, 

 Oryssus, Ichneumon, Banchus, Ophlon, Foenus, 

 Evania, Chalcis, Sphex, Pompilus, Larra, Tiphia, 

 Scolia, Chrysis, Thynnus, Leucospis, Bembex, 

 F'espa, Masaris, Mellinus, Philanthus, Crabro, 

 Hylaeus, Andrena, j4pis, Eucera, Nomada, For- 

 mica, Dorylus, Mutilhi In this list the new 

 genera are printed in Roman characters. Of these 

 Oryssus is separated from Sircx ; Banchus, Ophion, 

 and Foenus, from Ichneumon ; the first containing 

 such Ichneumons as have a compressed subsessile 



( 0-) Aldomen cowpressum , aijus diameter transversalis cedit 

 yiCrtirali. Philos, Ent. c. ii. §12. 



abdomen^ 



