MONOGRAPH OF THK NORTH AMERICAN rUOCTOTRYPID^. 31 



Antt-rior wiufjs with Ji couiplete marginal cell. 

 Autennie 13-j()iuted. 



With 2 (liscoidiil cells Eupsenku-a Westw. 



With 1 (liscoidiil cell Sikrola Cameron 



5. Mesonotal furrows distinct. 



Antennae 13-,jointod; maxillary palpi 6-jointed; lahiala 3-jointe<l; fore femora 

 much swollen. 

 Scutelluni with a transverse grooved line at base. 



Maxilla tril(>l>e<l at apex Calyoza Westw. 



Maxilla bilobed at ajiex Epvkis Westw. 



Scutelliiin with 'A fovea' at base Mesitius Spinola 



Mesoiiotal furrows wanting or indistinet. 



Antenna' i:{-Jointed; fore femora much swollen. 



Scutellum with a transverse grooved line at base (Ei'Yhis) 



Scutellum with '?■ fovea' at base (Mesitius) 



Auteunie 12-jointed Anoxus Thorns. 



6. Antenna! 12-joiuted Perisemus Forster 



Auteuuaj 13-joiuted GONiOiiUS Forster 



MALES. 



1. Anterior femora much swollen 2 



Anterior femora not swollen; anterior wing with 1 or 2 discoidal cells, usually 



open. 

 Mesonotal furrows distinct, usually 4 ; antenna- 13-jointed; no parastigma. 

 Mandibles 4 or 5 dentate; maxillai'y palj)i 0-jointed. 

 Abdominal segment 2 without umbilicate tubercles. 



First discoidal cell distinct ; stigma large Pristockra Klug 



First discoidal cell indistinctly detined, always open; stigma small, 



IsoBRACHiUM Forster 

 Mandibles 3-dentate; maxillary palpi 4-jointed. 

 Abdominal segment 2 with 2 umbilicate tubercles, 



DissoMPiiALt's Ashm. gen. nov. 



2. Anterior wings with a distinct marginal cell, the stigmal nervure always long. .4 

 Anterior wings without a marginal cell, the maginal and stigmal uervures want- 

 ing, or very short. 



Anterior wings with a short linear marginal nervure and a short radius 3 



Anterior wings without marginal and stigmal nervures. 

 Antenna' 13-jointed. 



With 2 basal cells Scleroderma Latr. 



W'ith 1 basal cell Ateleopterus Forster 



Antenna- 12-J.)inted Cephaloxomia W^estw. 



3. Antenuic 13-jointed L.elus Ashm. gen. nov. 



Antennjc 12-jointed Bethyi.us Latr. 



4. Anterior wing with an incomplete marginal cell, the stigmal vein long 5 



Anterior wing with a complete marginal coll; antennai 13-Jointed. 



With 2 discoidal cells Eupsenella Westw. 



With I discoidal cell Sierola Cameron 



5. Basal nervure with a branch direct backwards, often forming a closed cell ; a 



parastigma 6 



Basal nervure without a branch directed backward; no parastigma. 

 Mesonotal furrows distinct. 



Antennae 13-jointed, ramose Calyoza Westw. 



Antenna" 13-jointed, simple, filiform. 

 Scutellum with a transverse fovea at base; maxilla terminating in two 



lobes Epyris Westw. 



Scutellum with 2 fovea- at base; maxilla terminating in 3 lobes, 



Mesitius Spiuola 



