DIPTERA. —MUSCIDZ&. 155: 
STEGANA Meiy. Drosoruita p. Fall. 1 sp. annulata Hal. Meig. pl. 58. f. 22. 
Head hemispherical, depressed; palpi very thick ; wings curved, marginal nerve 
nearly reaching the apex; first transverse nerve near the base of the wings. 
O. Hynpromyzives. 
(See Mr. Haliday’s monograph in Ann. Nat. Hist. June and August, 1839). 
TEICHOMYZA Mcq. Eruypra p. Mcg. vol. vii. 1 sp. TT. fusca Meq. (R. 
longipennis Mg.) 
Head longer than broad; face very prominent, as far advanced as the rest of the 
head, setose on each side; style of antenne naked; abdomen elongate, 
6-jointed. 
OCHTHERA TLatr. Trruritis Fab. 1 sp. O. Mantis Latr. 
Fore femora greatly thickened ; cox elongate. My Ent. T. B. pl. 3. f. 7. 
NOTIPHILA Fall. Kenratrocera R.D. 3sp. N. cinerea Fall. - 
Legs subequal; eyes glabrous; second joint of antenne unguiculated; costal 
nerve terminating at the apex of the wing; abdomen ¢ unarmed, 
8. g. Dichaeta Meig. Notiphila Fall. 1 sp. D. caudata Fall. 
Differs from Notiphila in having the ¢ abdomen spinose. 
8. g. Discomyza Meig. Psilopa Fall. 1sp. D. incurva. Meig. pl. 58. f. 14 
Differs from Notiphila in having the costal nerve carried round the apex of the 
wing, and the wings deflexed posteriorly. 
S g. Trimerina Mcq. Psilopa Fall. 1 sp. P. madizans Fall. 
Abdomen apparently 3-jointed ; proboscis unigeniculate ; wings flat. 
S. g. Hygrella Hal. Psilopa Fall. 2 sp. P. nitidula Fall. 
Third joint of antennz oblong ; abdomen 5-jointed ; wings flat. 
S. g. Discocerina Mcq. Notiphila Meig. 4sp. P. calceata Fall. 
Antenne with the third joint suborbicular ; abdomen 5-jointed ; proboscis 
1-geniculate. 
S. g. Hecamede Hal. -———— 1sp. N, albicans Meig. 
Proboscis bigeniculate ; wings flat ; costal nerve running round the apex of the 
wing. 
HYDRELLIA R. D. Noripuita Fall. 15 sp. H. flaviceps Meig. 
Legs subequal ; eyes pilose or velvety; antennze with the second joint exun- 
guiculate ; wings exunguiculate. 
Hydrellia R. D. Arista pectinated above ; face convex. 13sp. N. flaviceps Meig. 
. g. Atissa Hal. Arista pectinated above; face impressed. 1 sp. A. pygmea Hal. 
S. g. Glenanthe Hal. Arista finely pubescent. 1 sp. G. ripicola Hal. 
EPHYDRA Meig. Nortenia Fall. 35 sp. E. riparia Fall. Curtis, 413. 
Legs subequal; eyes glabrous; antenne with the second joint exunguiculate ; 
proboscis incrassate. 
The following Subgenera of Ephydra are described by Mr. Haliday in his mono- 
graph on this group. Hydrina Desy. 7 sp. (Not. punctato-nervosa Fall.) ; 
Hyadina Hal. 2sp. (E. guttata Fall.); Axysta Hal. 1 sp. (EB. viridula 
Desv.); Pelina Hal. 1 sp. (N. enea Fall.); Napea R. D. 5 sp. (E. 
coarctata Fall.); Ilythea Hal. 1sp. (LE. spilota Hal. Curtis, 413.); Cenia 
R. D. 3 sp. (LE. palustris Fall.) ; Scatella Desy. 10 sp. (E. quadrata Fall.); 
Teichomyza Meq. 1 sp. (T. fusca Mcq. described above); Ephydra. 2 sp. 
(E. riparia Fall.) ; Canace Curt. 1 sp. (C. Nasica. ) 
