480 ICHNEUMONID. 



Genus LIMNERIUM, Aslimead. 



Limneria, Holmgren (nee Adams), Ofv. Sv. Ak. Forh. 1858, p. 3^6 ; 



Thomson, Opusc. Ent. xi, 1887, p. 1103. 

 Limnerium, Ashmead, Canad. Entom. xxxii, 1900, p. 368. 

 Eulimneria, Schmiedeknecht, Opusc. Ichn. 1909, p. 184. 



GENOTYPE, Ichneumon albithis, Gmel. 



Head not abruptly constricted posteriorly ; clypeus with 

 small lateral foveae ; mandibles short and stout, but little narrowed 

 apically. Antenna stout and apically subattenuate. Thorax not 

 pale-marked ; metanotum distinctly excavate longitudinally 

 throughout, with the areae indistinct and the basal costa alone 

 determinate ; basal area short and often transverse ; spiracles not 

 elongate. Abdomen somewhat broad and but little compressed 

 apically ; petiole not narrow, with the lateral foveae obsolete ; 

 postpetiole distinct and but slightly rounded laterally ; terebra 

 stout. Legs not slender, with the tarsal claws only basally sub- 

 pectinate, and the hind tibiaa often dark-banded before their base. 

 Wings hyaline ; areolet somewhat large and regularly triangular, 

 often elongately petiolate and emitting the recurrent nervure 

 near its centre ; basal nervure suboblique, second discoidal cell not 

 apically acute ; nervellus neither oblique nor intercepted. 



Ranye. Holarctic Eegion, India, Ceylon. 



This is the typical genus of the small CAMPOPLEGIDES with circu- 

 lar spiracles, and it has gone through various degrees of contraction. 

 Holmgren's original broad and well-marked diagnosis was sub- 

 divided by Fb'rster, in 1868, into numerous small genera, of which 

 the typical one the fifty-eighth was allowed to retain but the 

 single character : "The poetpetiole with distinct lateral margins." 

 Many of these genera have since been elaborated in a scholarly 

 manner by Professor Thomson, and a few more employed by 

 Dr. Schmiedeknecht, who considers it necessary to change the 

 name of the genus from Ashmead's amended form, because that 

 might be taken to indicate the old Limneria in its broad sense and 

 not the restricted Limneria of Thomson, to which it was most 

 obviously applied by its author. The genus Ichneumon might fall 

 on the same grounds ! 



I here use the genus in as restricted a sense as possible in the 

 circumstances ; that is to say, whenever I have had an opportunity 

 of examining Cameron's types I have relegated them to this or 

 other genera (more often the latter), but in several cases I have 

 had to fall back upon the almost invariably inadequate descrip- 

 tions, with the result that species of the genus as here set forth 

 cannot be considered entirely homogeneous, for some have pale 

 markings on the abdomen, the terebra hardly exserted, the scape 

 pale beneath, etc. Possibly some of those at present included 

 here should be relegated to Omorc/us, which also has the meta- 

 notum longitudinally excavate; if so, I have been unable to 

 separate them. However this may be, I trust the following table 



