BY FREDERICK A. A. SKUSE. 289 



Genus 11. Ceratopogon, Meig. 



Ceratopogon, Meig., 111. Mag. II. p. 261, 1803 ; Syst. Beschr. I. 

 p. 68, 1818 ; Latreille, Crust, et Ins. lY. p. 250, 1809 ; Curtis, 

 Brit. Ent. YL p. 285, 1829 ; Macquart, S. a B. I. p. 63, 1834 ; 

 Zetterstedt, D.Sc. ; Winnertz, Linn. Entom. YI. p. 3, 1852 ; 

 Walker, Ins. Brit. Dipt. III. p. 205, 1856. 



Antennae 2-+ 12-jointed, second joint of scapus and seven 

 following flagellar joints small, globose or ovate, adorned in ^ 

 with long hairs forming a thick brush or plume, last five joints 

 ovate, elongate or cylindrical. Proboscis more or less prominent. 

 Palpi 4-jointed; first joint small, second usually longer, cylindrical, 

 conical or oval,|third and fourth joints cylindrical or ovate, shorter 

 or longer than second joint. Wings hairy or naked. Marginal 

 cross-vein present or wanting. Third longitudinal wanting or 

 extremely rudimentary, indistinct. Fourth and fifth longitu- 

 dinal veins forked, the fork of the latter short. 



Winnertz's distribution of the species tabulated in his mono- 

 graph of Ceratopogon is substantially set forth in the following 

 translation ; the venation and cells in the wings being, however, 

 subject to an entirely different interpretation and nomenclature : — 



FIRST DIVISION. 



Marginal Cross-vein Present. 



A. Wings wholly or partially hairy, those of males of some 

 species entirely naked. All femora simple, unarmed. 

 a. Ungues with hairy pulvilli. Ungues of equal length in 

 both sexes. 

 1. In hind feet metatarsus shorter than "second tarsal 

 joint, or both of equal length. Forcipomyia, Meg.; 

 Lahidomyia, Steph. 



Second longitudinal vein joining costa : 

 19 



