iJiT. 15. REVISION OF ICHNEUMON-FLIES MUESEBECK. 9 



7. Clypeiis separated from the face by a distinct raised line; inner spur of 

 middle tibiae as long as middle metatarsus ; inner spur of posterior tibiae 

 longer, usually much longer, than half the posterior metatarsus; meso- 

 pleurae very rarely {riihricoxus) with a crenulate furrow; posterior coxae 

 half as long as the thorax ; metacarpus at least as long as the stigma. 



Microgaster Latreille. 

 Ciypeus not separated from the face by a distinct raised line ; inner spur of 

 middle tibiae decidedly shorter than the middle metatarsus ; inner spur of 

 posterior tibiae very rarely as long as half the posterior metatarsus; 

 mesopleurae (except in carinatus and striatus) with a distinct crenulate 

 furrow ; metacarpus rarely as long as stignm Microplitis Foerster. 



Genus OLIGONEURUS Szepligeti. 



Oligoneurus Szepligeti, Termez. Fuzetek., vol. 25, 1902, p. 77; Genera 

 Insectorum, fasc. 22, 1904, p. 103. Genotype.—Oligonetirus concolor Szepli- 

 geti. (Monobasic.) 



The original description was as follows : 



" Head transverse ; eyes hairy ; antennae 28-segmented ; parapsidal 

 grooves not distinct ; propodeum indistinctly areolated, with a median 

 carina; radial cell open, radius abbreviated; both intercubital veins 

 wanting, hence only one cubital cell present ; cubital and basal veins 

 arising separately from the parastigma, the first discoidal cell sessile ; 

 second discoidal cell open; nervulus interstitial with basal vein; 

 radial cell of hind wings wanting; legs rather stout; abdomen obo- 

 vate; second abdominal segment the longest; the last ventral seg- 

 ment large; second suture indistinct." 



This genus, based upon a single species from Brazil, has not yet 

 been discovered in our North American fauna. 



Genus MESOCOELUS Schulz. 



Coelothorax Ashmead, Proc. U. S. Nat. Mus., vol. 4, 1898, p. 1G5 ; Trans. 

 London Ent. Soc, 1900, p. 275. Genotype. — Coelothorax lueviceps Ash- 

 mead (Monobasic). 



Mcsocoelus Schuxz {= Coelothorax Ashmead, preoccupied), Zool. Annal., 

 vol. 4, 1911 (1909), p. 88. 



Head transverse; occiput immargined; antennae 24-segmented ; 

 parapsidal furrows wanting; mesoscutum with a rounded fovea or 

 depression; propodeum exareolated; mesopleurae with a furrow; 

 median and submedian cells of equal length; the other cells entirely 

 wanting; posterior legs long and stout, their coxae very long; abdo- 

 men sessile. 



MESOCOELUS LAEVICEPS (Ashmead). 



Coelothorax lacviccps Ashmead, Trans. London Ent. Soc, 1900, p. 276. 



Distribution. — St. Vincent. 

 Host. — Unknown. 



The unique type is in the British Museum, and the genus is known 

 to me only from the original description. 



