44 GENERA OK HYMEXOFTERA. 



Intenuediatc tibia- w itli only oue apical spur ; niesotlmiax nitrosc. 



X«»lolra<*Iiys Marsh. 



3. — Abdomen petiolate, very i-ari'ly st-ssile or subsessile (as in Plectiscus) 4. 



Abdomen sessile or subsessile, or if subpetiolate, the petiole depressed ; areolet 



rhomboidal 24. 



4. — Posterior femora unarmed 5. 



Posterior femora armed with a tooth beneath "2:5. 



5.— Marjiinal cell lanceolate <>. 



Marginal cell short, subtriangular or almost trapezoidal ~2. 



6. — Median and submedian cells of anterior wings not confluent; third discoidal 



cell jn-esejit, therefore two recurrent nervures 7. 



Median and submedian cells confluent by the absence of the externo-medial 

 nervure; second discoidal cell small, quadrangular, much narrowed be- 

 neatli, third discoidal absent, thei-efore unh/ one recurrent nerriire ; areolet 

 wanting; marginal cell small, sublanceolate; the .stiguja very slender, 

 scarcely thicker than the costal nervure; wings short, narrow ; thorax 

 rugo.se, metathorax aiul i)leura silvery-sericeous; antenuie short, aboiit 

 as long as head and thorax ; legs slender, femora unarnu'd ; abdomen 

 long, slender, sickle-shaped, nearly three times longer than head and 



thorax PliarMalia Cre.ss. 



7. — Spiracles of metathorax oval or elongate, rarely round (as in Absyrtun) 8. 



Spiracles of metathorax round 14. 



8. — Tar.sal claws not pectinate 9. 



Tar.sal claws pectiiuite 10. 



9. — Cubito-discoidal cell receiving the recurrent nervure in the middle, the third 

 discoidal cell not narrowed at base. 

 Posterior tarsi with the fir.st joint about twice as long as the second. 

 Apical nuirgin of clypeus broadly reflexed or bilol)ed. 



' S<*liizolonia Wesju. 



Apical margin of clyjieus truncate K.\OCliiluiU Wesm.. 



Posterior tai-si with the first joint about four times as long as the second; 



apical margin of clypeus broadly rouiuled...lI<'l«'r«|»eliiia Wesm. 



Cubito-discoidal cell receiving the recurrent nervure before the middle, the 



third discoidal cell narrowed at base ; apical margin of clypeus acutely 



angled or pointed. 



Eyes not hairy .\iioiiialoii (irav. 



Eyes hairy 'Triclioiiiiiia Wesm. 



10. — Scutellum convex, apex rounded; areolet present 11. 



Scutellum depressed, subquadrate; areolet wanting; eyes dccjily emargin- 



ate; antennaj scarcely longer than half the body.-.Cliarops Jlolmgr. 



11. — Spiracles of first abdominal segment placed in middle or before the middle. .12. 



Spiracles of first abdominal segment placed behind the middle ; head not 



extended behind the eyes; clypeus iu)t separated; teeth of mandibles 



subequal ; scape feeblj' emarginate at tip above. ..<"aiii|>0|»li'.\ (irav. 



12.— Spiracles of metathorax oblong 1.5. 



Spiracles of metathorax round '.\lisyrtus Ilohiigr. 



13. — Head much swollen l)ehiiid tlie eyes, the latter not touching l)ase of rnaiidi- 

 bles, which arc tolerably broad, with two equal teeth at apex ; metatho- 

 rax carimite and tuberculate; sjiiracles of first alxbmiinal sfgnn'Ut 

 jdaced in the middle OphcItoM Jiulmgr. 



