346 ERRATA. 



Genus XVIII. CJENIA, ii. 264. Ephydra p., Stnh. ; Ztt.Notiphila p., Roscr. 



1. albula, ii. 265. 19fumosa, Stnh. ; Ztt. 



2. palustris, ii. 265. 20; Stnh.; Ztt. Long. 1^; alar. 3 lin. 



3. obscura, ii. 265. 21. 



4. defecta, ii. 265. 22. albidipennis, Stnh.; Ztt. caruleifrons, Roser? 



Genus XIX. SCATELLA, ii. 265. Ephydra p., Stnh. ; Ztt. 



1. sibilans, ii. 265. 23. nubilipennis, Stnh.; Ztt. Long. 1-J-; alar. 3 lin. 



2. leucostoma, ii. 266. 24. Long. ; alar. 2^. 



3. sorbillans, ii. 266. 25. argyrostoma, Stnh.; Ztt. stagnalis, fcem., Fin. 

 Long. Ii; alar. 3 lin. 



4. sestuans, ii. 266. 26. flavipennis, Stnh. ; Ztt. Long. 1 ; alar. 3^ lin. 



5. stagnalis, Fin. p. ; Stnh. ; Ztt. buccata, ii. 266. 27. Long. l ; alar. SA lin. 



6. lutosa, ii. 266. 28flavescens, Stnh.; Ztt. Long. 1|; alar. 2f liii. 



7. despecta, ii. 266. 29. -fenestrata, Stnh. ; Ztt. maculipennis, Gmtl. Long. 

 1 ; alar. 2 lin. 



8. Bestivationis, L. fn. ii. 1843 (1761). noctula, ii. 267. 31 ; Stnh.; Ztt. 

 irrorata?, Mg. ; Mcq. Var. comta, ii. 267. 31. 



9. quadrata, ii. 267. 32 ; Stnh. ; Ztt. Var. Stenhammari, Ztt. 



Genus XX. TICHOMYZA, ii. 267 ; Desv. Ephydra p., Mg. ; Gmtl. 



1. fusca, ii. 267. 33. longipennis, Mg. 5-punctata, Gmtl. urinaria, Desv. 

 Long. 2f ; alar. 6 lin. 



Genus XXI. HALMOPOTA. Ephydra p., Bouche. 



Caput depressurn, hypostomate porrecto fornicato utrinque ciliato, epistomate ex- 

 serto. Antennae articulo tertio obtuso, arista glabra. Ungues parum curvati, 

 onychiis minutissimis. Venula discalis alsc margini proxima. 



1. salinaria, Bouche, nat. 99. 91. pi. vi. f. 13, 14 ! Long. 2; alar. 5^ liu. 

 About salterns ; the larva in the brine-pits. 



Genus XXII. EPHYDRA, ii. 268. Cania p., Von Heyden. 



' 1. riparia, ii. 268. 34 (demt. synon. salinaria), Stnh. ; Ztt. Antennarum arti- 

 culo tertio mutico, arista villosula, vena radiali apice subrecta ; mas, pcristomate 

 subtiliter ciliato, abdominis segmento quinto elonyato sextum cingente ; fatm.pe- 

 ristomate pectinate. Long. 2; alar. 5 lin. 



Abundant everywhere by the seacoast, on pools of brackish water. 



2. halophila, Von Heyden, e. z., v. 203 (1844). salines, Ztt. Antennarum 

 articulo tertio unipili, arista villosula, vena radiali apice subrecta, peristomate 

 subtiliter ciliato, mas, aut pectinate, fern. 



Swarms about salterns ; the larva in the brine-pits, up to six per cent, of salt. 



3. micans, ii. 268. 2. aurata, Stiih. ! ; Zett. Antennarum articulo Icrlio uni~ 

 pili, arista subtiliter pubescente, vena radiali apice incurvata, peristomate subtiliter 

 ciliato ; mas, abdominis segmentis subaqualibus, quinto infra bipartite. 



Common in many places on fresh-water lakes and pools. 



Genus XXIII. CANACE, ii. 268. 



1. nasica, ii. 268. 36 ; Nat. H. Review, ii. 64. pi. ii. fig. 11. Head above brassy 

 grcen. 



