NOTIPHILA. 253 



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

 Hal. ; Zett. — viridescens ? Desv. Obscure ajiiea, aiitennis, tibiis tur- 

 dsque poster iorihm f err uglneis, alls hyalinis. Long. \; alar. 1^ liu. 



Dull-aeneous. AnteuuBe, tib'ue, 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 asnea, antennis pedibusque ferrugineis, alls hya- 

 linis, vena discali transversa fmco-cincta. Long, f ; alar. \\ lin. 



UuU-ffineous. Autennse and legs ferruginous. Wings hyaline; dis- 

 eal transverse vein bordered with brown. 



Common among aquatic plants. (E. I.) 



Subgenus 6. Discocerina. 



DiscocERiNA, Mcq. D. ii. (1835); Hal. Notiphila p., Fal.; Meig.; 

 Zett. Hydrellia p., Mcq. 



Fades medio convexa, lateribus ciliata. Proboscis basi tantimi geuiculata. 



Antennce articulo tertio suborbicidato. Alee plana. Tibice intei'medicB 



nisi apice nudre. 



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

 at the base. Antenna loith the third joint siiborbiculate. Wings hori- 

 zontal. Middle tibice 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. Yar. /3. An- 

 tennis subtus et fronte antice ferrugineis. — obscurella? Fal. Act. Holiu. 

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

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

 2 lin. 



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

 Tarsi ferruginous. Yar. /3. Fore part of front and antennfB beneath 

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

 black. 



Common in moist grassy places. Yar. /3. rare. (E. L) 



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

 scutelli disco sidtglabro, tarsis basif/avis. Long. 1 ; alar. 2 lin. 



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

 hyaline. Tarsi yellow at the base. 

 Not rare about streams. (E. I.) 



