354 COXXECTICT'T GEOL. AXP XAT. HIST. SURVEY [BuU. 



P. i T rici/2)hona) yernaUs (O.^.) (Fig:. 41, H). 

 1861. Amalopis vernalis Osteii Sacken; Proc. Acad. Xat. Sci. Phil- 

 adelphia. 1861:291. 



Figs. — Alexander, Proc. Acad. Nat. Sci. Philadelphia, 1916, pi. 2%. fig. 51 (wing) ; 

 1916. Alexander, Cfls. N. Y., 1, pi. 42. fig. 185 (wing) ; 1919. 



General coloration gray, the j^raescutum with three brown stripes, 

 median stripe rarely divided by a pale vitta. Head brownish g:i"ay. 

 Wings with a faint brown tinge, heavily spotted with darker brown. 

 M-cu connecting with M^ just beyond base; cell 1st 31-2 in cases open 

 by atrophy of m.. ]Male hypopygium (Fig. 41, H) with the dististyle 

 bearing a slender, setiferous, tail-like lobe. $ . L. 6.5-7.5 mm. ; w. 

 8-9 mm. 9. L. 11-12 mm.: w. 10.5-12 mm. 



(Late May. June) Ont.. Que, N. B., Me., N. H., \'t., Mass., N. Y., southw. to 

 N. C. S. C. and Ga. 



Connecticut— Hartland, June 9, 1929 (C. P. A.). 



Dicranota Zetterstedt 



iSiis. IJ icranof a Zetterxtedt: Ins. La])ponica, Dipt., p. 851. 



The uniting of several groups of small crane-flies into the single 

 genus Dicranota has rendered this the largest genus within the tribe, 

 with nearly a score of .species occurring in our faunal limits. The 

 members of the genus are readily told from the larger Pediciini by the 

 usually unvariegated wings, generally open cell 1st Mo-, and small size. 

 The antennal structure, including number of segments, is remarkably 

 variable among the dilferent species. Similarly the venation is high- 

 h^ plastic, especially as regards the radial Held, and most of the sub- 

 generic groups here recognized are separated on slight details of vena- 

 tion. Such groups are admittedly artificial and are maintained chiefly 

 for convenience in handling the unwieldy mass of species. Occasion- 

 ally abnormal specimens are found in a series but since more than a 

 single, or even several, species may be taken at a single place and date, 

 the identification should be checked by a study of the male hypopyg- 

 ium. The adtdt flies occur along woodland streams, in gorges, in 

 boggy areas, and similar ecological situations. The carnivorous larvae 

 live in the wet soil in or near such places. 



Kc\ to Subficncra 



1. A supernumerary crossvein in cell R^ about opposite end of vein Sc^ 2 



No supernumerary crossveins in cells of wing 4 



2. Cell 1st M-2 closed (Figs. 23, C; 40, E) ....'. Eudicranota 



Cell 1st M-j open bv atrophy of rn 3 



3. Cell Mr lacking (Fig. 40. F) Paradicranota 



Cell Ml present Dicranota 



4. Cell 1st M; closed (Fig. 40. G) Amalopina 



Cell 1st M2 open by atrophy of 111 5 



5. Cell Ml lacking (Fig. 40. H) Plectromyia 



Cell 3/1 present (Fig. 40, I, J) Rhaphidolabis 



