306 PROCEEDINGS OF. THE ACADEMY OF [1894. 



Tribe XII.— LARRINI. 



Under this head are placed all those genera of the old family 

 Larrida3, which have the hind ocelli distorted and more or less obsolete. 



Just within the inner eye margins there is a more or less developed 

 longitudinal fold or swelling. 

 Mundiljles not dentate within; outer side of anterior tibia? armed 

 with strong spines; pygidium ( 9 ) not pubescent . . .IjAkra Fabr. 

 Mandibles armed with one or two teeth within. 

 Pronotum drawn under the dorsulum, especially at the sides ; 

 metanotum longer than the dorsulum; anterior femora (i) not 

 emarginate near the base; pygidiai area covered with a hoar- 

 frost-like pile NoTOGONiA Costa. 



Pronotum not drawn under the dorsulum ; metanotum shorter 

 than the dorsulum; anterior femora ($) enuirginate near the 

 base as in Tuchyspliex and some species of Tdchi/tes ,- pygidiai 

 area on apical portion with short, stiff hairs. 



Ancistnomma Fox. 



Within the inner eye nuirgins there are no signs of a swelling or fold. 

 Coml) on anterior tarsi (9) composed of stifl", tolerably short 

 thorns; pygidiai area entirely covered with pubescence; hind 

 ocelli linear, hooked ar upper end; fore femora of $ either emar- 

 ginate or not e)narginate near the base beneath . Tachytes Pz. 

 Comb on anterior tarsi ( 9 ) composed of very long flexible spines 

 or bristles; pygidiai area naked; hind ocelli oval; fore femora ( $ ) 

 always emarginate near the base beneath . Tac'HY.shhp:a' Kohl. 



Trii)e XIII.— TRYPOXYLONINT. 



Anterior wings witli three submarginal cells; abdomen short, sessile. 



Female with a well-developed pygidium; nuu-ginal cell shorter 



than the first submarginal; antenna' of i more or less dentate 



PiSONOPSIS Fox. 



Female without a pygidium; marginal cell nearly as long as the 

 three submarginal cells united; antennpe of $ not dentate. . . 



PisoN >Spin. 



Anterior wings with two submarginal cells; abdomen long, clavate 

 Trypoxyi.on Latr. 



Subfamily OXYBELINiE. 



In my opinion the peculiar armature of the metathorax and 

 postscutellum, toji^ether with the form of the eyes and neiiration, 

 justifies the retention of the genus 0.ri/hcli(s in a subfamily. Saus- 

 sure forms a trilie of it. 



