112 GENERA OF HYMENOPTERA. 



Table of Genera. 



Petiole of abdomen biartit'iilate ; second siil>iiiai;.Miial coll receiving both recur- 

 rent ncrvures Aiiiinophila Kirby. 



I'eliok' of alxlomen uniarliculate ••■2. 



2.- Second submarginal cell receiving both recurrent nervures, or the first re- 

 current nervure received at the intersection of the first and second 



submarginal cells 3. 



Second and third submarginal cells each receiving a rccnrnut nervure 4. 



3. — Prothorax narrowed anteriorly into a neck and longitudinally impressed 

 laterally ; anteiuiEe inserted low down on the face at the base of the 

 short transverse clypeus ; head subtriangnlar when viewed from 

 above; apex of third submarginal cell extending beyond the tiji of 



the marginal cell l»0«liuiii Latr. 



Prothorax scarcely narrowed anteriorly ; antenna; inserted on the middle of 

 the face, the clypeus being almost or quite as long as wide ; apex of 

 third submarginal cell not extending beyond the tip of the margi- 

 nal cell. 

 Black, with yellow markings; clypeus bilobed at ajiex. less distinctly so 

 in the % ; petiole of abdomen as long as the entire tlmrax. 



I'elopwMS Latr. 



Blue or violet, without pale markings; clypeus tridentate at apex, that of 



9'sometimes with a small additional tooth on each side: petiole of 



abdomen not as long as the metathorax Clialybion Dahlb. 



4. — Tarsal claws unidentate beneath ; anterior margin of clypeus with three 

 teeth in % , and five in 9 ! petiole of abdomen a little longer than 

 po.stcrior coxfc ; marginal cell extending a little beyond the third 

 submarginal cell, the second submarginal narrow, twice higher than 



wide; color blue, green or violet tliloi'um Latr. 



Tarsal claws bidenlate iKnieath. 



Petiole of abdomen more than twice the length of posterior coxje ; niar- 

 ginal cell not extending beyond the third submarginal cell ; cl yjieus 

 of 9 with a notch in the middle of the elevated anterior margin, 

 and a short tooth on each side of the notch ; clypeus of % sinijile, 



or with a slight crenulation I»iU4loiilia Patton. 



Petiole of abdomen as long, or only a little longer than the posterior 



COXffi. 



Marginal cell extending beyond the third submargiiuil cell ; clypeus of 

 9 crenate on anterior margin, or with >liort bi-oad teeth: clypeus 

 of % truncate, the margins crenulate ^»|>llO.\ Linn. 



Marginal cell not extending beyond the third submarginal cell ; clypeus 

 % 9 with a broad sinus on each side anteriorly, the central portion 



broadly produced and truncate IlarpacloiiiiN Smith. 



Tai^sal claws with five teeth beneath, the basal oni' veiy small; peti(de of 

 abdomen no longer than the posterior coxa' ; marginal cell not ex- 

 tending beyond the third submarginal cell: clyi)ens of 9 produced 

 in its whole width, a deep notch in the middle, above which is an 

 elongated depression; clypeus of % not so broadly ]>roduced, 



slightly sinuate anteriorly l*ri«ii<>ii.y.\ Dahlb. 



The <renurt Aminophila i.s reprc-^eiited by about lliirly .^jn'cictf from 



