PARASITIC HYMENOPTERA. 209 



FF. Os patulum. 



Sp. 13. O. instabilis. Niger, antennarum basi ore pedibus- 

 que testaceis, metathorace losvi nitido ; fern, counts posticis basi 

 fuscis, terebra \ abdominis longitudine. (Long. 1 lin.) 



O. instabilis. Wesm. Monogr. 126. No. 9. 



Obs. — In nostris abdominis segmentum 2 medio Iseve nitens : alse 

 albido-hyalmae : nervus recurrens in areolam cubitalem 2 longe 

 evectus : tarsorum articulus unguicularis feminis incrassatus. 



Habitat Hiberniam borealem in nemoribus at infrequens. 



Sp. 14. O. crassipes. Niger, mandibulis pedibusque crassis 

 testaceis, coxis trochanter ib us femorumque margine supero et 

 infero nigris, stigmate elliptico ; fem. terebra \ abdominis 

 longitudine. (Long. 1 lin.) 



O. crassipes. Wesm. Monogr. 127. No. 10. 



Habitat in Hibernia boreali semel atque iterum lectus. 



Sp. 15. O. saevus. Niger, antennarum scapo ore pedibusque 

 testaceis, nerw recurrente subinterstitiali, metathorace ruqur 

 loso ; fem. terebra \ abdominis longitudine. (Long. corp. 1| ; 

 alar. 3| lin.) 



0. instabili major, antennas longiores, alas multo ampliores, areola 

 radialis longior, nervi recurrentis insertio fere interstitialis : an- 

 tennae corpore longiores, articulis mas 34, fem. 29, duobus 

 interioribus testaceis : clypeus et mandibulae testacese, hae basi 

 non excisae : metathorax abdominisque segmentum 1 rugulosi, 

 hoc validum basi bicarinatum : alse hyalinse, squamulis testaceis, 

 nervis et stigmate fuscis : stigma tenuissimum lineari lanceolatum, 

 cubitum in triente prima excipiens : areola radialis in apicem alae 

 efFusa, cubitalis 2 sat longa, apice parum attenuata, nervus recur- 

 rens in alis posticis manifestus. 



Habitat per Ebudes insulas mas et femina lecti Augusto mense, — 

 feminum Damnoniensem misit F. Walker. 



Sp. 16. O. celsus. Niger, antennarum scapo ore pedibusque 

 testaceis, metathorace ruguloso, areola cubitali 2 elongata wqui- 

 lata, mas. (Long. 1 — 1| lin.) 



Antennas corpore longiores, 33 — 36-articulatas : alae amplae glauco- 

 hyalinae, squamulis testaceis, stigmate nervisque fuscis : E. 



