154 GENERIC SYNOPSIS. 
P. Hyrocera Latr. Trineurz Meig. 
PHORA Latr. Trineura Meig. 30sp. P. incrassata Meig. Curt. 437. 
Third joint of antennz spherical ; margin of wings ciliated. 
S. g. Gymnophora Meq. ‘Trineura Fall. 1 sp. P. arcuata Meig. 
Second joint of antennz spherical ; margin of wings not ciliated. 
S. g. Conicera Meig. ————— l1sp. C. atra M. 
Third joint of antennz conical, elevated vertically. 
Family 4. (or 23.) (STRIDE Leach. (stracide Meig. 
Astomata Dum. ) 
CESTRUS Auct. Hyroperma Latr. 2 sp. CG. Bovis Fab. Curt. 106. nee Linn. 
Nerves not extending to the hind margin of the wing; first discoidal cell ex- 
tending to the front apex of the wing. 
CEPHALEMYIA Lair. Qéstrus p. Clark. 2sp. CG. Ovis L. 
Differs from Cistrus in the first discoidal cell closed. Meig. t. 38. f. 16. 
Gastrus Meig. ; : 
GASTEROPHILUS Leach. cee Late Meg, } 45. E. Equi Fab, 
Nerves extending to the hind margin of the wing. Curt. 146. 
Sect. II. (or Stirps 5.) Tuoracocernata Westw. (Purreara Latr. 
Order Homaloptera MacL. Omaloptera Leach.) 
Family 1. (or 24.)% “HIPP OBOSCID Leach. (Coriacex 
Meig.) F ia ¥ 
‘ Prd 
HIPPOBOSCA L. Nirmomyta Nitzsch. 1sp. H. equina L. Curt. 421. 
Wings full-sized ; neryures not extending to the apex. 
ORNITHOMYIA Olf., Latr. Hrirrososca p. L. 4sp. H. avicularia L. 
Wings full-sized ; nerves distinct, extending to the apex; antennz ciliated. 
Curt. 585. 
HAEMOBORA Curt. QOrniryonta Meig.? 1sp. H. pallipes. Curt. 14. 
Wings full-sized; nervures distinct (fewer than in Ornithomyia), extending to 
the apex; antennz not ciliated. 
CRATERINA Olfers. Srenrerreryx Leach. 1sp. H. Hirundinis L. Curt. 122. 
Wings long, very narrow, and accuminated (jig. 133. 13.) 
OXYPTERUM Kirby. Awnarera Meig. 2sp. O. Kirbyanum Leach. 
Wings short, triangular. K. & S. pl. 5. f. 1. 
MELOPHAGUS Latr. Metornita Nitzsch. 1 sp. H. ovina L. Curt, aa 
Apterous. My fig. 133. 11. 
Family 2. (or 25.) NYCTERIBIIDZ Westw.  (Nycteri- 
bidz Leach.) 
NYCTERIBIA Latr, { CBtEnires Mont. \ 1 4). N. Latreillii Leach. 
Purutrivium Off. 
Apterous; abdomen ? simple. Curt. 277., and my fig: 133. 15. 
S.g. Stylidia Westw. Nycteribia p. Mont. 1 sp. -N. biarticulata Herm. 
Differs in the abdomen of 9 being furnished with two long styles (my fig. 133. 23.) 
