of the British Hydromyzidae. 407 



Hydrina viridula. Desv. Myod. 795? — Ephydra cesta. Ent. 

 Mag. i. 177. — Trimerina cceruleiventris. Macq. S. aB. ii. 529. pi. 21. 

 fig. 12? 



On grass ; Hollywood ; rare. 



Subg. 4. Pelina, Curt. Guide, App. 

 Facies latissima perpendicularis lateribus tenuissime ciliata ; cly- 

 peus subexertus. Arista subtilissime pubescens. Abdomen depres- 

 sum. Nervous discoidali-recurrens prope marginem alae. 



Sp. 11. cenea, E. P. obscure senea facie albicante, tarsis flavis, 

 alis hyalinis. 



Meig. Dipt. Eur. vi. 124. — Notiphila id. Fallen, Act. Holm. 1813. 

 p. 253. Hydrom. 11. — Ephydra glabricula. Meig. Dipt. Eur. vi. 

 121. Macq. S. aB. ii. 538. 



Common among aquatic plants. 



Subg. 5. Nap^ea, Desv. 

 Caput depressum : facies proclivis latissima vix nisi nuda ; clypeus 

 exertus. Mentum valde incrassatum. Arista basi pubescens. Corpus 

 pedesque subglabri. Abdomen depressum suborbiculatum. Nervus 

 prsebrachialis-recurrens fere in medio alee. 



* Nervus radialis apice appendiculatus. 

 Sp. 12. coarctata, E. N. fusco-senea tarsis basi ferrugineis, alis 



fuscanis nervis transversis obscuris, arista nisi basi nuda. 

 Fallen, Act. Holm. 1813, p. 247. Hydrom. 4. Meig. Dipt. Eur. 

 vi. 116.— Eph. rufitarsis. Macq. S. a B. ii. 536. pi. 22. f. 2.—Na- 

 pcea stagnicola major. Desv. Myod. 800. 

 Abundant on pools. 



Sp. 13. litoralis, E. N. obscure aenea tarsis basi ferrugineis, alis 

 fuscanis, nervis transversis obscuris utrinque hyalino-guttatis, 

 arista villosa. 

 Meig. Dipt. Eur. vi. 116. tab. 60. fig. 8. Macq. S. a B. ii. 536. 

 Less common than the preceding. 

 E. ^-punctata, M., also belongs to this group. 



** Nervus radialis simplex. 

 Sp. 14. Aquila, E. N. fusco-aenea alis fuscanis, nervis transversis 



obscuris, tibiis basi apiceque albis, tarsis ferrugineis. 

 Fallen, Act. Holm. 1813, 247. Hydrom. 4. Meig. Dipt. Eur. vi. 

 117. Macq. S. a B. ii. 537. 

 Not rare on pools at Hollywood. 



Sp. 15. fossarum, E. N. fusco-senea tarsis basi ferrugineis, alis 

 fuscanis, nervis transversis obscuris. 



