EPHYDRA. 267 



Nigricans,facieJIavicante, thoracefusco Uneolis albidis, alis ftiscanis hya- 

 lino-guttatis, tarsisferrugineis. Long, f ; alar. If lin. 



Blackish. Face yellowish, Thorax brown, with whitish stripes. 

 Wings brownish, with hyaline dots. Tarsi brown. 



Common in moist places. (E. I.) 



31. comta, Hal. E. M. I. 176 (1834). cinerea? Desv. Nigra, 

 facie albida, thoracefusco, alisfuscanis hyalino-guttatis. Long. f- ; alar. 



1 lin. 



Black. Face whitish. Thorax broion. Wings brownish, with hya- 

 line dots. 



Generally one-half less than E. noctula, of which it may be a 

 variety. (E. I.) 



32. quadrata, Fal. Act. Holm. 1813. 255. 5. 6 (1813); Meig. ; 

 Mcq.; Hal. A. N. H. iii. 410. 31; Zeli.graminum, Hal. E. M. I. 

 176. Nigricans, thoracefusco Uneolis albidis, alls fusco-nubeculosis 

 margine antico nigro-tessellato, tarsisferrugineis. Long. % ; alar. If lin. 



Blackish. Thorax brown, with whitish stripes. Wings clouded with 

 brown, tessellated with black along the fore border. Tarsi ferruginous. 

 Var. j3. Face whitish. Var. y. Pace yellowish. 



Common. (E.I.) To the same group belong E. paludum, 

 E. lacustrisj and E. quadriguttata, Meig. 



Subgenus 9. TEICHOMYZA. 



TEICHOMYZA, Mcq. D. ii. 535 (1835). Scatella p., Desv. Ephydra 

 p., Hal. 



Caput depressum ; facie longe porrecta fornicata setosa, sub antennis im- 

 pressa ; clypeo recondito. Peristomatis mar go pectinatus. Antenna 

 arista elongata glabra tenui. Ungues validi curvati ; onychiis conspi- 

 cuis hirtis. Fcem. Abdomen apice subcompressum, rima verticali. 

 Head depressed. Face porrect, arched, bristly, impressed beneath the 



antennae; clypeus withdrawn. Border of the peristoma pectinated. Arista 



long, bare, slender. Claws stout, curved. Onychia conspicuous. Fern. 



Abdomen compressed at the tip, with a vertical furrow. 



33. fusca, Mcq. D. ii. 535 (1835); Hal. Pusco-olivacea, thorace 

 lineolis duabus anticis cinereis, alis fuliginosis ; Mas, femoribus mediis 

 subtus pectinatis, metatarso antico incrassato. Long. 2 ; alar. 4 lin. 



Brownish olive-colour. Thorax in front with two grey stripes. 

 Wings smoky. Male. Intermediate femora pectinated beneath. Fore 

 metatarsus incrassated. 



" On the walls of damp outhouses, in winter, where the larvae 

 (as observed by Macquart) feed on the decomposed mortar." 

 (E. I.) This fly occurs in great numbers in London and in some 



