29^ 



TABLE FOR DETERMINIXG THE GENERA. 47 



f Wings conspicuously liairy on the whole surface or along the 



I veins. 25 



25 ■! 



j Wings not conspicuously hairy on the surface, veins glabrous, or 



I almost so. 27 



f Wings conspicuously hairy on the whole surface. 



Gen. XVI. Rhypholophus. 



I Wings conspicuously hairy along the veins and not in the cells. 



I Gen. XVII. Ekioptera. 



"The first submarginal cell is remarkably short, half as long as the 



second or less ; Tab. II, fig. 2, 4. 28 



^' The first submarginal cell is much longer than half the length of the 



second. 29 



I Marginal cross-vein wanting. Gen. XXIII. Goniomtia. 



( Marginal cross-vein present. Gen. XXIV. Empeda. 



("The distance between the subcostal cross-vein and the tip of the 

 I auxiliary vein is more than twice the length of the great 



cross-vein. 30 



The distance between the subcostal cross-vein and the tip of the 

 I auxiliary vein is moderate or small (usually not more than the 



I length of the great cross-vein). 31 



( Seventh longitudinal vein straight ; Tab. II, fig. 1. 



I Gen. XVIII. Trimicra. 



30 i 



j Seventh longitudinal vein conspicuously bisinuated ; Tab. I, fig. 20. 



(^ Gen. XX. Symplecta. 



r Body uniformly black. Gen. XXI. Gnophomyia. 



31 < Body black, scutellum and pleurse marked with yellow.' 



' Gen. XXII. Psilocoxopa. 



Section IV. Limnophilina. 

 09 ( Wings pubescent. Gen. XXIX. Ulomorpha. 



( Wings glabrous. 33 



{Seventh longitudinal vein very short, abruptly incurved towards the 

 anal angle ; Tab. II, fig. 13. Gen. XXX. Trichocera. 



The seventh longitudinal vein follows the ordinary course. 34 



f A supernumerary cross-vein between the auxiliary vein and the 



I costa. Gen. XXVII. Epiphragma. 



34 •! 



j No supernumerary cross-vein between the auxiliary vein and the 



I costa. Gen. XXVIII. Limnophila. 



Section V. Anisomerina. 



„- f Three posterior cells. 36 



( Four or five posterior cells. 37 



' I am not suflSciently acquainted with the European genus PsHocouojui 

 to distinguish it from Gnophomyia in a satisfactory manner ; the distinction 

 given here is merely empirical. (Compare their descriptions below.) 



