G. C. DAVIS. 241 



5. Clypeiis strongly elevated, and witli a beak-like projection in 9 ; abdomen 



rusiose. sessile, basal segment without distinct furrow above 6. 



Clypeus not strongly projecting 7. 



6. Wings with an areolet «Grypocentrus Kuthe. 



Wings without an areolet Campotlireptus Foer. 



7. W^ings with an areolet S. 



Wings without an areolet 14. 



8. Face narrowed below €atasteiius Foer. 



Face not narrowed below 9. 



9. Metanotum not areolated Aperileptus Foer. 



Metanotum areolated 10. 



10. Clypeus very flat 11. 



Clypeus arched and somewhat compressed at sides 13. 



11. Cheeks separated from face by a deep furrow ; metathorax at base with 3 or 



5 areolets 12. 



Cheeks not separated from face by a deep furrow ; six areolets at base of 

 metathorax *Holoineristus Foer. 



12. Clypeus transveri?e ; three areolets at base of metathorax. 



'Eiitypoiiia Foer. 

 Clypeus subrhombic ; five areolets at base of metanotum .'■Blapticus Foer. 



13. Face separated from clypeus which is small, much com})ressed laterally and 



with large side grooves *Dialipsis Foer. 



Face not separated from clypeus. but indicated by a crease. Plectiscus Grav. 



14. First segment of flagellum shorter than second ; in % the second member is 



emarginate llionieris Foer. 



First segment of flagellum as long, or longer than second 15. 



15. Segments 5-7 of flagellum in % are emarginate; metatliorax truncate at 



apex ; hind coxse granular Helictes Haliday. 



Segments 5-7 not emarginate; metathorax of 9 uot truncate; coxte not 

 granular Ifi. 



16. Metathorax divided before the middle by a transverse carina. •■Dicolus Foer. 

 Metathorax not as above 17. 



17. Vertex open above and without transverse carina LS. 



Vertex entirely separated from occiput by transverse carina 19. 



18. Third segment of flagellum emarginate; stigma broad . .•■■Apoclima Foer. 

 Third segment of flagellum not emarginate ; stigma small • . Atel^nt** Foer. 



19. Stigma very small '''Polyaiiloii Foei-. 



Stigma not small 20. 



20. Metathorax plainly and regularly areolated at base 21. 



Metathorax not plainly areolated at base .23. 



21. Antennfe less than thirty membered Heiiiipliaiies Foer. 



Antennae more than thirty membered 22. 



22. Abdomen strongly compressed beyond fourth segment. *Wyriartliru« Foev. 

 Abdomen not strongly compressed IVIega^ityliifsi Schiodte. 



23. Ovipositor projecting and with broad guides; members of flagellum from 



middle to tip almost string-like : all members, in % , cylindrical and with 

 a whorl of hairs from each segment ; segment 6 feebly emarginate. 



Kiisit'riii.i: Foer. 



Ovipositor protruding and with very small guides; all nienibei-s of flagellum 



cylindrical and not hairy : segment 6 not emarginate. l*i*0(flitii»« Foer- 



TRANS. AM. ENT. SOC. XXIV. 1,31) SEPTEMBER, 1897. 



