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4. 7 (or 9 )* niedio-cubito-apical veins 5 



5 (or /)* medio-cnbito-apical veins Xisia 



5. I'^ace not very narrow,, parallel-sided -'Kenucsia 



Face very narrow, widening" at apex ''■'Alara 



6. Veins of cubitus running straight to hind margin 7 



\'eins of cubitus irregular, forming one or more angular 



cells, sometimes in conjunction with first median sec- 

 tor '. 8 



7. Cubitus 3-4 veined Mysidia 



Cubitus 10-11 veined Dcrbe 



8. Lateral keels of face contiguous to near apex 10 



Lateral keels of face not contiguous, face not linear .... 9 



9. \'ertex narrow, about twice as long as broad ; in dorsal 



view keels of face projecting about half the length of 



eyes Dichotropis 



\'ertex as long as broad ; in dorsal view keels of face 

 projecting about the length of eyes Decora'''' 



10. Xo triangular cell at base of first median sector (or radial 



cross-vein ) 12 



Triangular cell present at base of first median sector (or 

 radial cross-vein ) 11 



11. Shoulder keels well developed Lcz'it 



Shoulder keels not developed Rliofaiia, Gcncstia''' 



12. I'ace longer than clypeus, eyes reaching below middle of 



genae Siimaiii!;ala''' 



Face not longer than clypeus, eyes confined to upper ])or- 

 tion of genae Mccyiiorhynchiis 



A'isia ]\Ielichar. 



A', atrot'cnosa Lcth. 



There are s])ecimens from IJorneo and I'iroe which I cannot 

 separate from this species. 1 am unaljle to separate this genericly 

 from Mccnoplns afbosi^^natiis. 



Siri'ii Kirkaldv. 



Text figures 3 and 3a in 11. S. I'. A. I'.nt. I'-nll. Ill ]). 166 are 

 of .S". kocbclci Kirk., not l^hacioccphahis : it has one more a])ical 

 vein than Xisia. 



Pliacoiiciira Kirkaldw 

 (1) P. laratica s]). nov. { S 9). 



Dirty yellow, abdomen, including genital styles, dark fuscous; 

 tegmina hyaline, broadly bordered with fuscous, the fusciness 



Depends upon wlictlicr tlic fiiKt fDikcil vein lie CDiisidi'i-cd a.s rudiiil or niodiiin. 



