IIYMKNOPTEUA. 587 



IcJineifmoii pro\tQr, Las tlie head transverse, the abrlonicn oval, nearly equally narrowed at each end. [Xuinci-oiis 

 Itritidi species.] Panzer has separated, under the name of Trogu-s, those species which have the scutelhim in the 

 form of a conical tubercle, aiul the abdomei) mark(.'d by deep transvt-rse impressions. 



Alomti'm, i'anzer, has tlie litiad narrower and more rounded, with the abdumcn more dilated towards the poste- 

 rior extremity. 



lliipslcera, Latr. [Tryphon {Exoch^i^) Grav.], has the appearance of Alomyia, but is remarkable for its pyramidal 

 head, with a frontal elevation supiiortinj; the antenna::. 



Pc/la-ftes, llli,;?. (Melopius, Panzer), has the abdomen united to the thorax by the greater part of its transverse 

 diameter, subsessile, and slightly dilated towards the extremity. Ic/in. necatorius, Panz. [and two or three allied 

 British species]. They have a circular elevation beneath the antennaj. 



The seccmd and last division of the species with 5-jointed maxillary and 3-jointed laliial palpi has the labium 

 deeply notched, and the ovipositor is exserted and covered at the base by a vomeriforui plate ; the bind thiglis 

 are tliick. 



.-[i:ciii/n.\-, Lfitr.. has tlie fi'ont of the head not produced into a beak. In 



Agathi-s, Latr., it forms a beak. These insects approach in their wings the following subgenera. 



Our second division of the Ichneumons differs from the preceding in respect to the joints of the 

 palpi onlv, in consequence of the labial palpi having only three joints, as in the majority of the species 

 of Llie following division ; the second cubital cell is nearly as large as tlic first, and nearly squai'C ; the 

 ovipositor is exserted; the tip of the mandibles is Intid or notched. 



liracon, Jur., has an evident hiatus between the mandibles and clypeus -, the maxilla: are prolonged inferiorly 

 beneath the mandibles ; the second cubital cell is square and ratlier large ; the oviiiositor is long; the antennai 

 are setaceous, as long as the body, and the maxillary palpi are much longer than the labial. 



Vi/no, Latr., has the antennae shorter and filiform ; the maxilla; are proporiiouably larger, and form a kind of 

 beak, and the maxillary palpi are not much lunger than the labial. 



I\Jicrogost<.-r, Latr., does not exhibit any decided hiatus between the mandibles and clypeus ; the maxillte and 

 lower lip are not prolonged ; the second cubital cell is small. The ovipositor as well as the abdomen is short. 



Our third and last division, corresponding with the genus Bassus of M. Esenbeck, has like the 

 preceding, four joints in the labial palpi, but the maxillary palpi are 0-jointed; the abdomen is 

 semi-sessile. 



Ill some the mandibles are gradually narrowed to the tip, and terminated by two teeth. 



llc/coii, Nees, baa the abdomen, seen from above, composed of several joints, and terminated by a long ovi- 

 positor. 



Si<ia/j>l/iis, Latr., has the abdomen vaulted benealb, and ordy 3-jointed above, with the ovipositor withdrawn and 

 stiiig-like. 



<_'/t''li'/i>(.\-, .Tur.,has the abdomen similarly formed beneath, but inarticuhited on its upper suface. 



Ahisia, Latr., has the mandibles nearly square, with three teeth at the tip, one in the middle, and the t^-o others 

 formed by the produced angles of the terminal margin. 



[The investigation of the Ichneumonidae, since the death of Latreille, has been greatly attended to; the great 

 work of Gravenhorst has made us acquainted with the Ichneumones genvini, or those which composed Latreille's 

 tirst division, whilst t\\fi Ichneumoves odsciti, or those composing the two other divisions of Latreille, have been 

 described by Dr. Nees Von Esenbeck, Professor "Wesmael of Brussels, and Mr. Haliday, in various memoirs and 

 separate publications, in which a great number of genera are added to those noticed in the text.] 



The third tribe, Galltcol.e {Biplolepariat, Latr.) has only a single nerve in the hind wings ; the upper 

 wings possess a few cells or areolets : namely, two brachial cells at the base, the internal one being 

 generally incomplete or but slightly distinct, one radial and triangular, ami two or tbree cubital ; the 

 second in tbose which have three, being always very small, and the third very large, triangular, and 

 closed bv the external margin of the wing. The antennrc are thickened at the ti]i, but not funning a 

 mass, and mostly from 13- to 15-jointed ; the ])alpi are very sliort, [not very long, as described by 

 Latreille]. The ovipositor is rolled spir.ally up in the interior of the abdomen, with tlie posterior 

 extremity lodged in a slit of the belly ; the GaUicola^ form the genus 



C^'NiPS, Linn., — 

 Vriiich Geoffroy inconsiderately named Diphlepis, and gave the name of Ci/nips to insects of the 

 following familv, united by Linnaeus with the terminal division of the Ichneumons. 



Tlie abdomen is compressed, the thorax very much elevated, the ovipositor of the females appears to 

 consist of a single long and very delicate piece, rolled up spirally at the base, and the terminal part 

 beiu'' lodged beneath the anus, between two elongated valves, each forming a derai-sheath. The 

 extremity of this ovipositor is channelled with lateral teeth, with which the insect enlarges the slits 



