406 Mr. A. H. Haliday on the generic distribution 



Meig. Dipt. Eur. vi. 122. Macq. S. k B. ii. 5S9 .^Notiphila id. 

 Fallen, Act. Holm. 1813. p. 254. Hydrom. 12. — Hydrina maculi' 

 pennis. Desv. Myod. 795. 



Common on grass. 



Sp. 6. interrupta, E. Hydr. thorace cinereo fusco-vittato, facie 

 antennis tarsisque flavis, alis fuscis disco hyalinis nervis trans- 

 versis fuscis. 



Ent. Mag. i. 176. 



Sandy shore of Killiney bay, county Dublin ; Hollywood ; rare. 



Sp, 7. posticata, E. Hydr. cinerea abdominis apice nigro, facie 

 antennis tarsisque flavis, alis hyalinis. 



Meig. Dipt. Eur.vi. 124. Macq. S. a B. ii. 539. 



Not uncommon, 



Subg. 2. Hyadina, Curtis, Guide, App, 

 Facies perpendicularis supeme parum angustata vix nisi nuda. 

 Arista pubescens. Abdomen 5-annulatum segmento 5^ magno gla- 

 berrimo. Nervus costalis alae apicem ambiens. Nervus discoidali- 

 recurrens ab alae margine distans. Nervi brachiales ibidem sinu ap- 

 proximati. 



Sp. 8. guttata, E. Hyad. nigra subnitida scutelli lateribus ater- 



rimis, antennis subtus pedibusque testaceis, alis albo-biguttatis. 



Meig. Dipt. Eur. vi. 125. — Notiphiia id. Fallen, Act. Holm. 



1813. 253. Hydrom. 11. — Ephedra nitida. Macq. S. a B. ii.539. 



Hydrina vernalis. Desv. Myod. 795. 



Varies, with the legs dusky, also with the face silvery-white 

 or straw colour. The clear dot above and below the trans- 

 verse nerve is not very evident unless when the wings over- 

 lap. 



Common in swampy spots. 



Sp. 9. scutellata, E. Hyad. nigra subnitida scutello aterrimo, an- 

 tennis subtus pedibusque testaceis, alis albo-biguttatis. — vix 1 

 lin. 

 Hollywood ; very rare. 



Subg. 3. AXYSTA. 



Facies perpendicularis medio subconvexa, supeme parum angus- 

 tata, vix nisi nuda. Arista pubescens. Abdomen quasi tri-annula- 

 tum, i. e. segmentis 1° et 5° minimis, basi marginatum. Nervus 

 costalis in alse apice evanescens : nervus discoidali-recurrens ab alae 

 margine distans : nervi brachiales ibidem sinu approximati. 



Sp. 10. viridula, E. A. nigra nitida abdomine punctatissimo cya- 

 nescente, facie albida vitta nigra. 



