No. 64] DIPTERA OF CONNECTICUT: TAXONOMY 343 



2. Size larse ( wiuR, r? , usually over 7 mm. ; in most cases much larger) : an- 

 tennae with 14 or 16 segments ; wings usually patterned with darker, either 

 as a costal shading or else spotted and marbled; no supernumerary cross- 

 vein in cell Ri] cell 1st Ah usually closed (Fig. 40, B-D) '. . . .Pedicia 



Size smaller (wing. $, under 7 mm.; where larger, with a supernumerary 

 crossvein in Cell Ri) ; antennae with either 13 or 15 segments; wings us- 

 ually immaculate, except for the stigmal darkening ; cell Ist jl/, usually open 

 by atrophy of m (Fig. 40, E-J) Dicranota 



1. Subtribe Ulakia 

 Ula Haliday 

 1833. Ula Haliday; Ent. Mag., 1 : 153. 



The genus Ula is very isolated in its affinities, in its various stages 

 curiously combining the characters of the two tribes Pediciini and 

 Hexatomini. The structure of the adult, especially the hairy eyes 

 and general conformation of the male hypopj^gium, is very like the 

 Pediciini. However, other features, especially of the larva, are more 

 essentialh' Hexatomine. 



The innnature stages of the various species of Ula are found in 

 decaying fungi. The adult flies are especially numerous in Spring 

 and Fall, being most often swept from yew and other low^-growing 

 evergreen shrubs in cold woods and ravines. 



Key to Species 



1. Antennae short in both sexes, if bent backward ending before the root of 



the halteres ; wings with the cord and outer end of cell 1st M-2 seamed with 



brown elegans 



Antennae of male elongate, if bent backward extending to beyond the base 

 of the abdomen; wings dusky, without a distinct pattern except the 

 stigmal clouding 2 



2. Mesonotum brownish, the praescutum with a broad, clearly defined, shiny 



brown median stripe; antennae uniformly dark brown, including the scape 

 and pedicel; in male of unusual length, if extended backward reaching 



about to midlength of abdomen longicornis 



Mesonotum grayish brown, without clearly defined darker stripes; antennae 

 dark brown, the scape and pedicel clear light yellow: in male relatively 

 long, if bent backward extending about to the base of the third abdominal 

 segment (Fig. 40, A) paupera 



Ula elegans O. S. 



1869. Ula elegans Osten Sacken ; Mon. Dipt. X. Amer., 4: 276-277. 



Figs.— Alexander, Cfls. N. Y., 1. pi. 41, fig. 164 (wing) ; 1929. Dickinson, Cfls. 

 Wise, p. 200. fig. 90 (wing) ; 1932. 



Antennal varticils exceeding the segments; brownish black, the 

 two basal segments clear yellow; head clear gray. Thorax dark 

 brown, with a yellowish pollen, the stripes ill-delimited. The dark- 

 ened wing-pattern varies much in the degree and intensity of the areas, 

 usually including the cord, outer end of cell 1st i)/o, origin of Rs^ and 

 both ends of the otherwise yellowish stigma. Male hypopygium with 

 the gonapophyses long and conspicuous, the outer pair simple, the 

 inner pair prolonged into needle-like points, before apex with an^ acute 

 erect to slightly recurved spine. 5. L. about 5-6 mm.; w. 6-7 mm. 

 2. L. about 6-7 nun.; w. 7-8 mm. 



