NOTIPHILA. 253 



7. nitidula, Fal. Act. Holm. 1813. 252 (1813); Meig. ; Mcq.; 

 Hal. ; Zett. viridescens ? Desv. Obscure aenea, antennis, tibiis tar- 

 xix///(c posterioribus ferrugineis, alis hyalinis. Long. -|; alar. 1^ lin. 



Dull-aeneous. Antennae, tibiae, and hinder tarsi ferruginous. Wings 

 hyaline. 



Not common. (E.) 



8. leucostoma, Meig.! Zw. vi. 68. 12. pi. 58. f. 12 (1830) ; Mcq. ; 

 Hal. ; Zett. Obscure aenea, antennis pedibusque ferrugineis, alis hya- 

 linis, vena discali transversafusco-cincta. Long. -f-; alar. 1^ lin. 



Dull-aeneous. Antennae and legs ferruginous. Wings hyaline ; dis- 

 cal transverse vein bordered with brown. 



Common among aquatic plants. (E. I.) 



Subgenus 6. DISCOCERINA. 



DISCOCERINA, Mcq. D. ii. (1835); Hal. NotipUla p., Fal. ; Meig.; 

 Zett. Hydrellia p., Mcq. 



Fades media convexa, lateribus ciliata. Proboscis basi tantum geniculata. 



Antenna articulo tertio suborbiculato. Alee planae. Tibiae intermedia^ 



nisi apice nudce. 



Face convex in the middle, ciliated on each side. Proboscis bent only 

 at the base. Antennae with the third joint suborbiculate. Wings hori- 

 zontal. Middle tibia bare, except at the tips. 



The species will form two groups : 



a. Clypeus very short, hardly exserted. Species 9-11. 

 a a. Clypeus exserted, inflexed, subquadrate. Species 12. 



9. nigrina, Meig. Zw. vi. 69. 17 (1830). Nigricans, fronte tho- 

 raceque cinerascentibus, facie exalbida, tarsis ferrugineis. Var. /3. An- 

 tennis subtus et fronte antice ferrugineis. obscurella ? Fal. Act. Holm. 

 1813. 251 (1813); Meig. Zw. vi. pi. 59. f. 15; Hal.; Zett. Var. y. 

 Minor, thorace fusco, pedibus fere totis nigris. Long. | 1 ; alar. 1-jp- 

 2 lin. 



Blackish. Front and thorax greyish. Face whitish. Wings hyaline. 

 Tarsi ferruginous. Var. /3. Fore part of front and antennae beneath 

 ferruginous. Var. y. Smaller. Thorax brown. Legs almost wholly 

 black. 



Common in moist grassy places. Var. (S. rare. (E. I.) 



10. calceata, Meig. Zw. vi. 69. 16 (1830) ; Hal. Nigra, subnitida, 

 scutelli disco subglabro, tarsis basijlavis. Long. 1 ; alar. 2 lin. 



Black, slightly shining. Disc of the scutellum almost smooth. Wings 

 hyaline. Tarsi yellow at the base. 

 Not rare about streams. (E. I.) 



