of the British Hydromyzidae. 407 



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

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

 fig. 12 .? 



On grass ; Hollywood ; rare. 



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

 Facies latissima perpendicularis lateribus tenuisslme ciliata ; cly- 

 peus subexertus. Arista subtilissime pubescens. Abdomen depres- 

 sum. Nervus discoidali-recurrens prope marginem alse. 



Sp. 11. eenea, 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 glahricula. Meig. Dipt. Eur. vi. 

 121. Macq. S. a B. ii. 538. 

 Common among aquatic plants. 



Subg. 5. Nap^a, 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 alse. 



* 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.—^;?^. rufitarsis. Macq. S. k B. ii. 536. pi. 22. f. 2,—Na' 

 pcea stagnicola major. Desv. Myod. 800. 

 Abundant on pools. 



Sp. 13. litoralis, E. N. obscure senea 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-senea 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. aB. ii. 537. 

 Not rare on pools at Hollywood. 



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

 fuscanis, nervis transversis obscuris. 



