of the British Hydromyzidae. . 405 



[Caput] depressum ; — clypeus 



exertus, 5. Napaea. 



reconditus ; — peristoma margine 



nudum, 6. Ilythea. 



villosum s. pectinatum : — arista 



dorso pectinata, 7. Ccenia. 



pubescens, 8. Scatella. 



glabra, 9. Teichomyza. 



Subg. 1. Hydrina, Desv. 

 Facies proclivis subtriangularis convexa, lateribus subtiliter ciliata. 

 Antennae mediocres articulo 3° subdeflexo, oblongo, dorso subira- 

 presso ; arista pubescens aut dorso pectinata. Palpi parum dilatati. 

 Abdomen 5-annulatum convexum, apice glabrum. Nervus discoi- 

 dali-recurrens ab alse margine distans. 



* Arista dorso longe villosa s. pectinata. 

 The minute species belonging to this section are remark- 

 able for the distinct variegation of their colours. The only 

 European species described is the following : 



Sp. 1. picta, E. Hydr. thorace fusco utrinque linea alba, scu- 



tello aterrimo, antennis subtus pedibusque testaceis. 

 Meig. Dipt. Eur. vi. 125. — Notiphila id. Fallen, Act. Holm. 1813. 

 p. 254. Hydrora. ii. 



Variat femoribus nigris, aut pedibus nigris tarsis basi rufescen- 

 tibus. 



Common on grass in shady places. 



** Arista pubescens, 



Sp. 2. punctato-nervosa, E. Hydr. thorace cinereo, antennis pe- 

 dibusque flavis, alis seriatim fusco-punctatis, nervis transversis 

 fuscis. 



Meig. Dipt. Eur. vi. 123. — Notiphila id. Fallen, Act. Holm. 1813. 

 p. 254. Hydrom. 12. 



In sandy places ; Portmarnock ; Hollywood. 



Sp. 3. flavipes, E. Hydr. thorace cinereo, facie antennis pedibus 

 flavis ; nervis transversis fuscis. 



Meig. Dipt. Eur. vi. 123. Fallen, Hydrom. 12. 



Not rare in meadows. 



Sp. 4. stictica, E. Hydr. thorace cinereo fusco-vittato, facie an- 

 tennis pedibus flavis, alarum nervis transversis et puncto fuscis, 

 Meig. Dipt. Eur. vi. 121. Macq. S. a B. ii. 539. 



Common in meadows. 



Sp. 5. interstincta, E. Hydr. thorace fusco-cinereo, tibiis tarsis- 

 que ferrugineis, alarum nervis transversis et punctis 6 fuscis. 



