G. C. DAVIS. 301 



8. Flagellnm 35 to 40 jointed, frequently thickened; petiole usually arched; 



in J the last segments are so excavated ahove that the ovipositor seems 



to lie on the hack 9. 



Flagellum not overly thick ; last segments of 9 ""^^ excavated 12. 



9. Metanotum areolated at base 10. 



Metanotum not areolated at base I'olj'friiietis Foerst. 



10. Wings without an areolet Honiaspis Foerst. 



Wings with an areolet 11. 



11. Segment 2 with two median cariute at base X<»*oi>.vs"S Holmgr. 



Segment 2 without carinse at base I»r«siiiO«*iis Foerst. 



12. Hind femora thickened : ovipositor curved upwards. CsilOfjly plus Foerst. 

 Hind femora not thickened ; ovipositor rai-ely curved upward 13. 



13. Cheeks jierfectly smooth, neither punctured nor shagreened 14. 



Cheeks either punctured or shagreened, or both 16. 



14. Wings with an areolet •■■Gausoceiitrns Foerst. 



Wings without an areolet 15. 



15. Ridge of vertex broken at the middle ' I.iaf liipoiiiis Foerst. 



Eidge of vertex not broken at the middle l*liobeles Foerst. 



16. Clypeus not separated by elevation 17. 



Clypeus plainly separated by elevation 18. 



17. Eyes flat, small, not arched above the surface of the head. 



' Hoinaloiniiia Foerst. 

 Eyes large, and arched above the surface of the head. 



BIypocrypfus Foerst. 



18. Face narrowed beneath Rlisestes Foerst. 



Face not narrowed beneath 19. 



19. Segments 2-4 twice as broad as long $if iphrosoinus Foerst. 



Segments 2-4 not twice as broad as long 20. 



20. Segment 1 with a carina at the side which extends from the spiracles to the 



apex 21 . 



Segment 1 without carina extending from spiracles to apex 31. 



21. Wings without an areolet 22. 



Wings with an areolet 25. 



22. Apical member of hind tarsi fully as long as the third and curved. 



Dizeiiioii Foerst. 

 Apical number of liind tarsi not as long as the third and not often curved. 23. 



23. Radius starting from the middle of the .stigma 24. 



Radius starting back of the middle of the stigma; metanotum entirely areo- 

 lated ; abdomen perfectly smooth ; shields of ovipositor very broad. 



'-'Callidiotes Foerst. 



24. Apical member of hind tarsi hardly longer than the fourth : tarsal claws not 



large ; metanotum regularly areolated ; first and second lateral areas 



not separated by a carina Ipoctou US Foerst. 



Apical member of hind tarsi plainly longer than the fourth ; tarsal claws 

 long ; metanotum not or incompletely areolated .MeMOleptus Grav. 



25. Last member of hind tarsi as long or longer tlian the third and plainly bent 



or curved ; body and antenuse long and slender. 



Hadrodactyliis Foerst. 



Last member of hind tarsi either plainly shorter than the third, or when as 



long, not bent or curved 26. 



TR.\NS. AM. ENT. SOC. XXIV. OCTOBER. 1897. 



