No. 64] DIPTEKA OF CONNECTICUT: TAXONOMY 385 



Key to Species 

 (Based chiefly on male characters) 



1. Wings pale yellow, unmarked johnsoni 



Wings heavily spotted and clouded with brown 2 



2. Wing-pattern more limited, restricted to the veins, there being a single dark 



cloud in cell 2nd A, this located at the end of vein 2nd A 3 



Wing-pattern more abundant, there being one or more dark clouds in cell 

 2nd A proximad of the one at end of vein 2nd A 5 



3. Wings broad, widest opposite the termination of vein 2nd A aprilina 



Wings narrower, widest opposite the central third 4 



4. Antennae ( $ ) short, if bent backward ending some distance before wing- 



root ; male hypopygium with the flange of outer dististyle (Fig. 45, E) 

 small, placed on outer half; inner dististyle (Fig. 45, K) with two pencils 



or tufts of setae irene 



Antennae ( i ) longer, if bent backward extending to shortly beyond the 

 wing-root; male hypopygium with the flange of outer dististyle (Fig. 45, (i) 

 large, placed on basal half ; inner dististyle without specially modified hair- 

 pencils sabrina 



5. Wing-pattern abundant, with numerous dots and clouds in the cells, including 



a series of three or four clouds in cell 2nd A ; male hypopygium with the 



outer dististyle widened distally (Fig. 45, J) vernata 



Wing-pattern more restricted, with only one or two clouds in the outer end 

 of cell 2nd A ; male hypopygium with the outer dististyle narrowed distally 

 (Fig. 45. H, I) 6 



6. Male hypopygium with the tip of the outer dististyle prolonged into a sleiukr 



lobe that is bifid at apex (Fig. 45, I) solstitialis 



Male hypopygium with the outer dististyle terminating in a simple acute apical 

 spine (Fig. 45, H) serotinella 



Limnophila {Elaeophila.) aprilina O. S. (Figs. 43, N: 45, C,I)). 

 1859. Limnophila aprilina Csten Sacken ; Proc. Acad. Nat. Sci. Phil- 

 adelphia, 1859 : 235. 



Figs.— Osten Sacken, Mon. Dipt. N. Amer., 4, pi. 4, fig. 23 (hyp.) ; 1869. Alex- 

 ander, Cfls. N. Y., 1, pi. 39, fig. 137 (wing) ; 1919. Alexander, Bull. Brooklyn Ent. 

 Soc, 22:64, fig. 2 (hyp.) ; 1927. 



General coloration yellowish gray, the praesciitum Avith four 

 scarcely indicated brown stripes; pseudosutural foveae black, very dis- 

 tinct. Legs yellow, the femora and tibiae weakly darkened at tips. 

 Wings broad in both sexes but more so in male ; a series of five or more 

 large costal areas; last marginal darkening at tip of vein 2nd A. Male 

 hypopygium with the flange of the outer dististyle large and conspic- 

 uous, placed on basal half of style (Fig. 45, C, D). 5. L. 6-7 mm.; 

 w. 7.5-8.7 mm. ? . L. 7-7.5 mm. ; w. 8.5 mm. 



(May. June) N. H., Vt., Mass., N. Y., southw. to N. C. and S. C. (Canadian). 



Connecticut.— Hartland, June 9, 1929 (C. P. A.) : Kent Falls, May 31, 1931 (C. P. 

 A.) ; W. Granby, June 8. 1929 (C. P. A.). 



L. (£'fe6;a/>7w?«) irene Alex. (Fig, 45, E, K). 



1927. Limnophila {Ephelia) irene Alexander; Bull. Brooklyn Ent. 



Soc, 22 : 58. 



Fig.— Alexander, Ibid., p. 64, fig. 3 (hyp.) ; 1927. 



Generally similar to apriJma in the heavy wing-pattern that is re- 

 stricted to the vicinity of the veins, the last marginal area being that 



