June, 1903] ASHMF.AD : CLASSIFICATION' OF THE PrOCTOTRYPOIDEA. 95 



ing principally to the families Cecidomyiidre and the Tipulidre. The 

 gall-inhabiting and fungus-inhabiting species are especially subject to 

 their attacks. 



Species belonging to the genus Ainitus Haldeman are, however, 

 reared from species belonging to the homopterous family AleurodidK, 

 but since these insects also have dipterous parasites or dipterous in- 

 sects associated with them, it is quite probable that the Amiti come 

 from the Diptera and not from the aleurodids. 



The family is quite closely allied to the Scelionidx, where Haliday 

 placed it, but from that family it may be easily separated by the dif- 

 ferent antennce which are never more than lo-jointed, by the 2-jointed 

 maxillary palpi, by the i -jointed labial palpi, and by the mandibles 

 which are always bidentate. 



Table ok Subfamilies. 

 Submarginal vein in front wings clavate or ending in a stigma or knob. 



Subfamily I. INOSTEMMIN.-E. 



Submarginal vein in front wings entirely absent or only indicated at the base, never 



clavate or knobbed at apex. Subfamily II. PLATYGASTEKIX^-E. 



Subfamily I. INOSTEMMIN.E. 



Table of Genera. 



1. Females 2 



Males 8 



2. Tarsi 5-jointed 3 



Tarsi 4-jointed. 



Antennx 8-jointed, the flagellar joints nodose-pedicellate, with whorls of 

 hairs ; submarginal vein ending in a small knob. 



Iphetrachelus haliday (type /. lar Hal.). 



3. Antennae I o-jointed 4 



Antennce 9-jointed Allotropa Forstey (type A. itieirida FoRST. ). 



4. Front wings with a basal nervure 5 



Front wings without a basal nervure 6 



5. Mesonotum with the furrows distinct or faint. 



Club of antennce 3-jointed MetacHsiS Fdrster. 



(type Platygaster ojcolatiis Hal. ). 

 Club of antennce 4-jointed Monocrita Forster {\.y}^e M. alinas FuRST. ). 



6. Lateral ocelli nearer the inner margin of the eye than to the front ocellus 7 



Lateral ocelli nearer the front ocellus than to the inner margin of the eye. 



Club of antennce 4-jointed Isostasius Fdrster. 



(type Platygaster punctiger Nees). 



7. Basal segment of the abdomen with a horn that extends forwards over the thorax ; 



mesonotum with faint furrows Inostemma Haliday. 



(type J'latygaster boscii). 



