1894.] NATURAL SCIKNCKS OP PHTT.ADEI.PHIA. 295 



8exes dissimilar in form ; 9 robust, <J loug aud slender ; 

 marginal cell ( 9 ) narrowed toward base (in our genera the mar- 

 ginal cell is always closed); antennaj in 9 s^bort, in $ long and 



slender, as long or longer than head and thorax 



MYZI^INr (/Yesu7es Sauss.) 



Tribe T.— t^COLIINI. 



Two genera occur in our fauna, as follows: — 



Anterior wings with only one recurrent nervure .... Scolia Fabr. 

 Anterior wings with two recurrent nervures Elis Fabr. 



Each of these genera may be divided into subgenera by the num- 

 ber of submarginal cells. In the subgenus Triscolia there are three 

 cells, while in D!--<coUii there are two. In Trielis three, in Dielis two. 



Tribe II.— TIPHIINI. 



The lirst and second submarginal cells merged into one through the 

 disappearance of the first transverso-cubital nervure ; base of 

 tirst aljdominal segment produced angularly or dentate on each 

 side; intermediate tibite with one spur Tiphia Fabr. 



Three submarginal cells, the first transverso-cubital nervure present, 

 but abbreviated, not reaching the cubital nervure; base of first 

 abdominal segment not produced or dentate at base ; inter- 

 mediate tibife with two spurs 



EPOMIDIOPTERONSichel (= Pr/ /•«!'//>///«). 



Tri))e III.— MYZININI. 



This tril)e is identical with Saussure's "Section des Plesiites. " 

 Plesta seems to be synonymous with Mijzlne Latr. The latter has 

 priority, being described two years in advance of Plesia. But one 

 genus, Mi/zine, is found in America, which may be distinguished by the 

 tribal characters given above. 



SAPYGID^. 



Intermediate coxi3e contiguous ; legs, except tibial spurs, unarmed ; 

 no pygidiul area ; apex of ( <? ) abdomen without spines. These 

 characters seem sufficient to keep these insects distinct from the 

 preceding family, to which they have been assigned by some authors, 

 and, moreover, the first and second ventral segments are contiguous, 

 while in the Scoliidie they are widely separated. Sapijya, our only 

 genus, has the eyes emarginate within, the intermediate tibiie with 

 two spurs. For several species having the vertex tuberculate, the 



