LIMXOPHILA. 5*21 



upper branch of 4th longitudinal vein usually forked ; 6th vein 



nearly straight, 7th moderately long ; posterior cross-vein 



generally near the middle of the discal cell, never before the 

 cell. 



Table of Genera. 



Xo cross-vein in either 2nd submarginal 



or 2nd basal cell LIMXOPHILA, Macq., p. 521. 



A cross-vein in one or the other of the 



cells mentioned. 

 Supplementary cross-vein in 2nd sub- [p. 524, 



marginal cell DICRAXOPHRAGMA, Os. Sac., 



Supplementary cross- vein in 2nd basal 



cell EPHELIA, Sch., p. 525. 



Genus LIMNOPHILA, 



Limnophila, Macquart, Suit, a Buff., Dipt, i, p. 95 (1834). 

 Limnomya, Rondani, Dipt. Ital. Prod, iv, Corrigenda, p. ii (1861). 

 Pilaria, Sintensis, Sitzgsb. Xatuif. Ges. Dorpat, viii, p. 398 (1888). 



GEXOTTPE. Coquillett ('Type species of Amer. Dipt.' 1910) 

 sets up Limnobia ferruginea, Mg.. as the type of the genus, but 

 he adopts the generic name Phylidorea, Big., possibly because 

 Limnophila is apparently preoccupied in Mollusca by Menke in 

 1828, although the Kertesz Catalogue still retains it. Coquillett 

 makes Limnophila, Macq., the same as Pcecilostola, Sch., of which 

 latter Limnobia pictipennis, Mg., is the type ; but Macquart's name 

 has stood for too rnanv years to be altered now. 



Head: eyes bare. Proboscis short, almost transverse; palpi 

 4-joiuted. Antennae 16-jointed, the joints varying in length with 

 the species ; in some species filiform, much longer in the male 

 than in the female, and also of a different structure ; in some 

 species as long as the whole body, iu others of equal length in 

 both sexes. Thorax normal, the neck more prominent in some 

 species. Abdomen normal. Genitalia of male comparatively long, 

 1st joint fleshy, 2nd consisting mainly of a pair of short strong 

 hooks in some species, and a narrow, short (quite small in 

 relation to the 1st joint), less horny hook in others. Wings com- 

 paratively broad, tip moderately rounded, clear or marked. Two 

 submargi'nal cells, generally five (occasionally only four) posterior 

 cells ; discal cell closed ; auxiliary vein ending about opposite the 

 base of the 2nd submarginal cell: subcostal cross-vein beyond 

 origin of 2nd vein, near tip of auxiliary vein ; marginal cross- 

 vein technically present, jnore or less oblique, but in some 

 species practically invisible; origin of 2nd longitudinal vein a 

 little before or after the middle of the wing ; the praefurca 

 (generally beginning in a curve) varying in length from barely 

 one-third to almost one-half the total length of the 2nd 



