248 AMERICAN HYMENOPTERA. 



7. Midvein in hind wins disappearing toward base '•■■ Pliru<lii!« Foer. 



Midvein in hind wing not disappearing toward base 8. 



8. Metanotum not regularly areolated, and with only a very low, median, apical 



area ; ocelli separated from each other farther than from edge of eyes. 



Ecxetesis Foer. 



Metanotum regularly areolated ; ocelli nearer to each other than to the edge 



of the eyes Priouopoda Holmgr. 



9. Antenn?e uf % broadly thickened in the middle: in f the ovipositor is not 



visible Euceros Grav. 



Anteunse of % not broadly thickened in middle; ovipositor of f plainly 

 visible 10. 



10. Abdomen with apical transverse impressions on basal segments ; antennae 



slightly thickened in the middle and tapering to apex in both sexes. 



SicopioruN Foer. 



Abdomen without transverse apical impressions on basal segments; antennae 



rarely thickened in middle 11. 



11. Femora incrassate ; grooves at sides of c.lypeus covered by a tuft of hair. .12. 

 Fjemora not incrassate, or if so the clypeus is not separated from the face; 



grooves not covered 13. 



12. Wings with an areolet ErroineiiUiiii Holmgr. 



Wings without an areolet * Trichocalyinnia Foer. 



13. Clypeus elevated and separated from the face by a distinct cross furrow, or if 



not, the metathorax is polished and without distinct carina 14. 



Clypeus not distinctly elevated and separated from the face; metathorax 

 carinatc iMonoblastli^i Hartig. 



14. Tarsal claws very thickly pectinate at tip and without teeth at base. 



•■ Ctenacine Foer. 

 Tarsal claws not thickly pectinate at tip and with comb-like teeth at base -15. 



15. Vertex not separated from occiput by a sharp ridge ; metanotum without 



carinse 16. 



Vertex separated from the occiput by a sharp ridge- .Polyblastus Hartig. 



16. Wings without areolet; metatarsi en lai'ged ; antennae longer than body. 



Scolobate!^ Grav. 

 Wings with an areolet; metatarsus not enlarged ; antennae short and small. 



Eatlirolesles Foer. 

 RHORLT$i» Foerster. 

 (Synopsis der Fam. und Gatt. der Ichueumonen, 1868.) 



Head oval, transverse; face inflated beneath antennae; clypeus 

 not strongly separated, mandibles strong and often with the lower 

 tooth the longer ; antennae longer than the body and slender. Thorax 

 oval, somewhat depressed ; metathorax with median areas small, 

 lateral median areas very large and broad. Abdomen elongate ; 

 petiole narrow at base, gradually widening toward apex. Legs 

 slender, tibiae and tarsi long, tibial spurs short, claws thickly set 

 with long teeth. Wings long, areolet triangular, slightly petiolate. 



Abdomen rufous, black at base and apex bicolor Cress. 



Abdomen with head and thorax black ottawaeiissis Harr. 



