LIMNOPniLA. 521 



upper branch of 4th longitudiual vein usually forked ; Gth vein 

 nearly straight, 7th modei-ately long ; posterior cross-vein 

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

 cell. 



Table of Genera. 



No cross-vein in either 2nd subniarginal 



or 2nd basal cell Limnophila, 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 Dicranophragma, Os. Sac, 



Supplementary cross-vein in 2nd basal 



cell Ephelia, Sch., p. 525. 



Genus LIMNOPHILA, Macq. 



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

 Livmoimja, Eondani, Dipt. Ital. Prod, iv, Corrigenda, p. ii (1861). 

 Filaria, Sintensis, Sitzgsb. Naturf, Ges. Dorpat, viii, p. 398 (1888). 



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

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

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

 Limnophila is apparently preoccupied iu Mollusca by JNTenke in 

 1828, although the Kertesz Catalogue still retains it. Coquillett 

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

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

 has stood for too mauy years to be altered now. 



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

 4-jointed. 'Antennae IG-jointed, the joints varying inlength 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 lieck more prominent in some 

 species. AhdomennovmdX. Genitaha of male comparatively long, 

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

 hooks iu 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 

 subniarginal 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, more or less oblique, but in some 

 species practically invisible; origin of 2nd longitudinal vein a 

 little before or "after the middle of the w'mg; the prsefurca 

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

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



