302 pr()cep:dings of the academy of [1894. 



1 — Labruin projecting in such a manner aw to cover the mandibles 



when closed, wx:)melinies rostriform 4 



Labriim projecting more or less,'-' but not covering the mandibles, 

 never rostriform ; antennje situated close to or not far fiom base 

 f)f clypeus ; if the latter is divided into three lobes the middle 



lobe is not greatly enlarged 2 



Labrum not at all projecting, hidden from view by mandibles ; 

 antenuse situated far above the clypeus ; middle lobe of latter 



greatly enlarged PHILANTHINI. 



2 — Mandibles emarginate on outer nuirgiu (except iu Trypoxylon) . o 



Mandibles not emarginate o 



3— Three submarginal cells; intermediate tibiie with two spurs. 



Second submarginal cell not petiolate; ai)ical joint of antennae 



{$) normal MELLININI. 



Second submarginal cell petiolate ; apical joint of antenuje ( $ ) 



peculiarly shaped NYSSONINI. 



Two submarginal cells ; intermediate tibi;e with one spur. 



NEOLAKRINI. 



4 — Intermediate tibia» armed with two si»urs at apex; submedian 

 cell of posterior wings extending far beyond the median on the 

 externo-medial nervure; labrum shorter than the clypeus, gene- 

 rally rounded anteriorly; ocelli distinct STIZINI. 



Intermediate tibi;e with but one spur at apex; submedian cell of 

 posterior wings not extending beyond the median on the ex- 

 terno-medial nervure; labrum longer than the clypeus, rostri- 

 form ; ocelli more or less imperfect EEMBICINI. 



5 — Hind ocelH normal 6 



Hind ocelli more or less distorted LARRINI. 



6 — Eyes entire 7 



Eyes emarginate within TRYPOXYLONINI. 



7 — Second submarginal cell not petiolate 8 



Second submarginal cell i)etiolate 10 



8 — Middle tibiae armed with two spurs at apex 9 



Middle tibite with one spur at apex LYRODINI. 



iJ--Eyes {$) touching above; second submarginal cell receiving both 



recurrent uervures AST ATI XI. 



Eyes {$) not touching on the vertex, widely separated; first and 

 second submarginal cells each receiving a recurrent nervure . . 



DIPLOPLECTRIXI. 



10 — No pygidial area (two submarginal cells) .... MISCOPHINI. 

 A pygidial area (three submarginal cells) 

 . BOTHYXOSTETHIX^I. 



Tribe I.— PHILAXTHINI. 

 Hind femora more or less thickened at apex, truncate, and produced 

 beneath Cerceris Latr. (=-£7i(cercem Cr.). 



^'^ Astatiiii and Uioploploctriui seem to be cxeeptions to this (lefiiiitii)n, or 

 else the hil)nim projeels so little a.s to he iiuliseernihle. 



