4. Lateral spots of abdomen distinct, propodcuni with some 



infuscation (). tnrsaUs 



Lateral spots of abdomen absent or incons})icnons, jn-o- 

 podenm entirely pallid 0. hulochJonis 



5. Thorax and abdomen not Avholly dark G 



Thorax and a])domen wholly dark O. incfnUicus 



0. Thorax wholly metallic 7 



Thorax largely pale, the propodeum mostly dark and 

 metallic, mesonotum with dark spots, etc 0. muirl 



7. Basal half (or nearly) of al)domen pale (whitish or pale 



yellow) 8 



Basal part of abdomen somewhat paler than the apical, 



bnt the paler part with darker lateral markings 



0. palUdipes 



8. First fnnicle joint extremely long, three times as long 



as wide where wddest ha.saJis 



First fnnicle joint much shorter, at the most rath.er more 

 than twice as long as wide 9 



9. First fnnicle joint longer than tlie second, 0. JwmorJirnnnis 

 First fnnicle joint snbeqnal to the second, 0. distinfjucudits 



10. ITind coxae pale 11 



ITind coxae dark 12 



11. First fnnicle joint snbeqnal to the second. . .0. Indnrliloriis 

 First fnnicle joint mnch longer tlian the 'Second, farsalis 



12. Whole thorax dark and metallic O. ha.'ialls 



Thorax pale with dark markings or at least witli the 



mesonotnm on its ]iosterior lialf ]iallid 13 



13. Mesonotnm dark onlv near its front margin; scntellnm 



pale, at most slightly infnscate and not metallic, ab- 

 domen not wholly dark on the ajiical segments, O ninirl 

 Mesonotnm dark on fully its anterior half, s<'ntellnm 

 notably darkened and metallic, apical part of abdomen 

 wholly dark and metallic 0. palUdipes 



^ (1) OotetmstirJnis ItolorJilorus fi.p. nov. 



Entirely jnillid, yellowisli, very probably green in life, the 

 head in dead exami)les generally (hirker than the thorax. The 

 thorax bears a few extremely small (Uirk spots or infuscations ; 

 one at the hind angles of the prouotnm and another close to 



