382 LIST OF niPTERA. 



5. DiOCTRIA Gagates. 



Nigra, nitida ; pedes concolores ; fades albido micans ; thorax 

 Itevis ; genua fulva ; alee in mare dimidiatim niyricanUi, in 

 fcemina paltide fuscescentes. 



Dioctria Gagates, Iloffm. ; Meig. 

 Portugal. 



6. DiOCTBIA SPECULTFBONS. 



Nigra; nitida, fades submetallica, thnrads dorsum fusco tomento- 

 sum ; vittis duabus Jlavescentibus ; alcB limpidce ; halleres 

 fiavi. 



Dioctria speculifrons, Hoffm. ; Meig. Zu-eifi. ii. 255, 28. Loew, 

 Linn. £nMi. 419,6. 



Portugal. 



7. DiOCTKIA COTHDRNATA. 



Nigra ; fades orichalcea ; thorax dnereus, nigro vittatus ; pec- 

 toris latera maculis micantibus nullis ; abdomen indsuris 

 sape albidis ; pedes fuld, tibiispostids tarsisque fusds ; al(P 

 dilute fuscescentes. 



Dioctria cothurnata, Meig. Zett. Dipt. Scand. viii. 2973. 



Var. ? Nigra ; fades orichalcea ; pedes fulvi, tibiis posticis 

 tarsisque fuscis ; alafuliginoscE. 



Dioctria infuscata, Meig. Zweifl. ii 252, 21. 

 France ? 



8. Dioctria aurifrons. 



Mas et foem. Nigra, nitida ; fades et pectoris latera orichalcea ; 

 thoracis dorsum luridum, opacum, nigro vittatum ; callus 

 hmneralis rufescens ; abdomen cingulis flavo-testaceis ; jyedes 

 flavo-testacei, tarsis subtus non punetatis. 



Dioctria humeralis, Zeller, Isis, 1840, 3r>, 3. Loew, Linn. Ent. ii. 

 422, 8. 



