198 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxm. 



Male genital organs not. retractile, rarely very large, except in Liometopurn; 

 workers and females with a rudimentary sting; orifice of cloaca 

 slit or cleft; pupse without cocoons. 



Family XLVIII. Dolichoderid^. 



Male genital organs most frequently exserted, the hypopygium obtusely tri- 

 angular or rounded at apex; workers and females without a sting; 

 orifice of cloaca round, terminal, surrounded with a fringe of hairs; 

 pnpai usually covered with a cocoon... Family XLIX. Formicid.'e. 



StxperfHiTiily V. PROCTOTRYPOIDEA.. 



TABLE OF FAMILIES. 



Trochanters distinctly 2-jointed 2 



Trochanters 1-jointed. 



Aiitennaj 14-jointed, inserted on the middle of the face; front wings with a 

 lanceolate stigma, the marginal cell long, open at apex; maxillary 

 palpi 5-, labial palpi 3-jointed; female abdomen very greatly length- 

 ened, slender and cylindrical, about five times the length of the 

 head and thorax united, composed of 6 segments; male abdomen 

 clavate Family L. Pelecinid^. 



2. Antennae inserted at the clypeus 5 



Antennae inserted on the middle of the face, often on a frontal prominence. 



Wingless forms 4 



Winged. 



Front wings with the marginal vein linear, never stigmated 3 



Front wings with the marginal vein stigmated, or Avith a distinct stigma. 

 Mandibles dentate; antennae 14-15 jointed; claws simple or pectinate; 

 hind wings ivith a more or less distinct A-enation. 



Family LI. HsLORiDiE. 

 Mandibles edentate; antennaj 13-jointed, with a ring joint; claws sim- 

 ple; hind wings ivithout a distinct venation. 



Family LII. PROCTOTRYPiDiE. 



3. Front wings with a distinct basal cell and usually with a marginal cell often closed, 



never entirely wanting, although often incomplete; hind wings 

 always with a basal cell; antennae 14-15-jointed; labial palpi 



3-jointed Family LIII. Belytid^. 



Front wings rarely with a distinct basal cell, the median vein most frequently 

 obsolete or subobsolete, the marginal cell never complete, usually 

 entirely wanting; hind wings always vnHioid a basal cell; antennae 

 12, 13, or 14 jointed; labial palpi 2-jointed. 



Family LIV. DiAPRiioiE. 



4. Mandibles edentate Family LII. PRocTOTRYPiDiE. 



Mandibles dentate. 



Labial palpi 3-jointed Family LIII. Belytid.e. 



Labial palpi 2-jointed Family LIV. Diapriid.e. 



5. Wingless forms 7 



Winged. 



Abdomen acute or margined along the sides, sessile or subsessile 6 



Abdomen rounded at sides, never acute or margined, sessile or subsessile; 

 front tibite with the apical spur strongly forked ; antennae in female 

 10-11 jointed, in male 11-jointed; front wingsalways wdthout a post- 

 marginal vein, the stigmal vein or radius usually long, the marginal 

 vein either linear or stigmated Family LV. Ceraphronic^. 



