of the British Hydromyzidae. 409 



Subg. 8. Scatella, Desv. 



Caput depressum facie buccata et margine peristomatis villosis 



aut setosis ; clypeo recondito. Arista arcuata pubescens. Antennae 



articulo 3° obtuso. Ungues curvati divaricati. Onychii manifesti. 



Sp. 22. sibilans, E. S. ferruginosa abdomine aenescente, facie 



flavida setosa, alis obscuris. 

 Ent. Mag. i. 175. 

 Very common on the sea-coast, Hollywood. 



Sp. 23. leucostoma, E. S. olivacea facie villosa albicante, alis ob- 

 scuris nervo transverso a margine remote 

 Meig. Dipt. Eur. 121. 

 Not uncommon on marine rejectamenta. 



Sp. 24. sorbillans, E. S. olivacea facie pubescente alba, alis ci- 

 nerascentibus indistincte hyalino 5-guttatis, m.f. 14- lin. 

 Not rare on the sea- coast. 



Sp. 25. (Estuans, E. S. cinerea fronte thoracisque dorso ferruginosis, 

 facie flavida, tarsis ferrugineis, alis ferruginosis guttis 5 albis 

 anteriore majore quadrata. 

 Ent. Mag. i. 176. 

 Common on fuci. 

 Sp. 26. buccata ; E. S. nigra fronte thoraceque fuscis, facie fla- 



vicante, alis fuliginosis hyalino 5-guttatis. 

 Scatella buccata, Desv. Myod. 801. — Ephydra stagnalisl Fallen. 

 Act. Holm. 1813, p. 248. Hydrom. 5 ? Meig. Dipt. Eur. vi. 118 ? 

 Macq. S. a B. ii. 537 ? 



The most abundant species. Fallen has probably con- 

 founded with his E. stagnalis all the species with hyaline dots 

 on the dark ground of the wings ; and though Meigen has 

 very fully distinguished many species of this character^ I can 

 scarcely identify any of mine exactly w 7 ith his descriptions. 

 Sp. 27. lutosa, E. S. fusco-cinerea fronte thoraceque ferruginosis, 

 facie flavicante, tarsis ferrugineis, alis infumatis hyalino 5-gut- 

 tatis. 

 Ent. Mag. i. 176. 



Found along with the last and almost equally abundant. 

 Sp. 28. despecta (Curt. App.), E. S. cinerea thorace fusco li- 

 neolis albidis, facie albida, alis cinerascentibus obsolete hyalino- 

 guttatis, m.f. femoribus mediis subtus basi pectinatis, m. 1 lin. 

 On the sea-coast and in sandy places : not common. 

 Sp. 29. noctula, E. S. nigricans thorace fusco lineolis albidis, 

 facie flavicante, tarsis ferrugineis, alis fuscanis hyalino guttatis. 

 Ann. Nat. Hist. Vol.3. No. 19. Aug. 1839. 2 g 



