18 94.] NATURAL SCIENCES OF PHILADELPHIA. 303 



Hind femora more or less narrowed at apex, not truncate, and not 

 produced beueath. 

 Abdomen with first segment nol at all petiolate. 

 Eyes entire within; submedian cell of posterior wings much 

 shorter than the median on the externo-medial nervure; J 



with a distinct pygidial area Aphilantjioi'S Patt. 



Eyes more or less emarginate within; submedian cell of posterior 

 wings as long or slightly longer than the median on the ex- 

 terno-medial nervure; 9 without a pygidial area. 



• PiiiLAXTHUS Fabr. 



Abdomen with hist segment subpetiolate, as in MelUnus. 



Th ACHY PUS Kl. 



Tril)e II.— MELLIXIXJ. 



In this tribe I include MelUnus and Gori/fes, separating them from 

 the Xyssonini chiefly because the apical joint of the i antennrc is 

 normal and is not crescent or otherwise shaped as in the Nyssonini; 

 also because the second subniargiual cell is not petiolate as in that 

 tribe. 



Antenme well separated, situated close to base of clypeus, anterior 

 margin of clypeus denticulate; a recurrent nervure received by 

 the third submarginal cell; abdomen always with first segment 

 always petioliform ^NIkllinus Fabr. 



Antcnnic approximate, generally w ell separated from base of clypeus; 

 anterior margin of clj-peus rarely or never dentate; third sub- 

 marginal cell never receiving a recurrent nervure, abdomen 

 rarely with the hist segment itetioliform . . . Gokytks Latr. 



The genera Hoplist(-% Dienoplux and Euspougns are identical with 

 Gorytea 



Tribe III.— NYSSONINI. 



Prothorax above subtjuadrate, longer than dorsulum; metathorax not 

 strongly spiuose; (posterior femora beneath at apex, produced 

 into a stout tooth), form slender. 

 Submedian cell of anterior \\ ings much longer than the median 

 on the externo-medial nervure; abdomen without a pale spot on 

 each side of the second dorsal segment . . . Didineis Wesm. 

 Submedian cell of anterior wings a little shorter than the median 

 on the externo-medial nervure; abdomen with a pale spot on 

 each side of second dorsal segment Alyson Jur. 



Prothorax abo\e very narrowly transverse; metathorax \\ith two 

 long sjiines (tooth of posterior femora not so strong as in the 

 ju-eceding two genera); form robust NvssoN Latr. 



