of the British Hydromyzidse. 403 



variety ofH, griseola with a white face, of which Fallen makes 

 mention, but he is mistaken in considering it as a sexual di- 

 stinction. 



Sp. 7. griseola, H. viridi-cinerea, subtus schistacea, facie fiavi- 

 cante, puncto frontali albissimo, tarsis posterioribus basi palpis- 

 que ferrugineis, alls hyalinis nervo transverse perpendiculari. 

 Macq. S. k B. ii. 523. pi. 21. fig. lO.-^Notiphila id. Fallen, Act. 

 Holm. 1813. p. 250. Hydrom. 9. Meigen, Dipt. Eur. vi. 66. 



The most abundant species in meadows. The wings and 

 legs are particularly long. The palpi usually dusky at the 

 base. The distinct white dot above the antennae is rarely 

 wanting. 



Sp. 8. chrysostoma, H. nigro-olivacea facie flavicante palpis fer- 

 rugineis, nervo transverso subobliquo. 

 Notiphila id. Meig. vi. 67. — Hydrellia viridescens. Desv. Myod, 

 793.? 



Not rare in marshes. 



Sp. 9. tarsata, H. nigro-olivacea facie palpisque flavis ; femoribus 

 anticis validis, tarsis iisdem subtus flavo-tomentosis, onychiis 

 longiusculis rufescentibus ; m. \\ lin. 

 Distinguished particularly by its onychii ; those of the other 

 species being short and white in both sexes. 

 Found but once at Hollywood. 

 Sp. 10. albiceps.H. nigro-senescens facie alba, palpis ferrugineis, 



alis obscuris, halteribus basi nigris. 

 Variat labeUis ferrugineis et antennarum articulo 3° subtus vel 

 etiam toto fulvo. 



Macq. S. k B. ii. 526. — Notiphila id. Meigen, Dipt. Eur. vi. 6S, 

 Hydrina fuliginosa, Desv. Myod. 793 ? 

 Common in marshes. 



Sp. 11. erythrostoma, H. nigro-aenescens antennarum articulo 3" 

 facie palpisque fulvis, puncto frontali albissimo, alis obscuris, 

 halteribus basi nigris. 

 Variat puncto frontali flavicante ; etiam antennarum articulo 3° 

 fusco. 



Macq. S. a B. ii. 526. — Notiphila id. Meig. Dipt. Eur. vi. 69. 

 Common on moist grassy slopes of mountains and in marshes. 

 Sp. 12. Cochlearia, H. nigro-senescens facie flavicante, palpis ni- 

 gris, alis obscuris, halteribus basi nigris ; f. 1 lin. 

 Very like the last, but I am inclined to consider it a distinct 

 species. 



Hollywood ; June ; rare. 



