199 
Length of wings, 6.75 mm. ; fore femora, 4.75 mm. ; tibiz, 5.5 
mm. ; hind femora, 5.75 mm. ; tibiz, 6.25 mm. 
Florissant, Colorado. Three specimens, Nos. 3751, 8050 and 
8151, 13715. The last is accompanied and partly overlain by a 
specimen of D. :fontainet. 
Dicranomyia fragilis. 
Lei pay aS He 
This appears to be the most abundant species of Dicranomyia at 
Florissant after D. stagnorum. The auxiliary vein terminates at a 
little distance beyond the origin of the prefurca, equal to about 
the width of the marginal cell, and has the subcostal cross vein at 
its tip. The preefurca arises at no great distance beyond the middle 
of the wing, but the marginal cell is nevertheless much shorter than 
the breadth of the wing, and its distal much shorter than its proxi- 
mal portion. ‘The first longitudinal vein descends obliquely though 
rather rapidly to the second longitudinal, giving a pointed extrem- 
ity to the marginal cell. The discal cell is closed and a little 
broader apically than at base, the second and third posterior cells 
short and subequal. The great cross vein strikes the inner lower 
angle of the discal cell. A delicate fringe of moderately long 
microscopic hairs can sometimes be seen around the entire wing, 
subrecumbent and stouter on the costa than elsewhere, nearly erect 
on the lower margin. Legs slender, the femora gradually thickened 
at apex, the tibiz apically spined, and the apical joint of tarsi 
characteristically arcuate. 
Length of wings, 6-6.5 mm. ; of legs in smallest specimens: fore 
femora, 4.5 mm.; tibiz, 5.75 mm.; tarsi, 6mm.; mid femora, 
6.3 mm. ; tibiz, 6.4 mm. ; tarsi, ?; hind femora, 6.4 mm. ; tibiz, 
6.75 mm. ; tarsi, 4.75 mm. 
Florissant, Colorado. Eleven specimens, Nos. 1388, 1997, 4701, 
5403, 6708, 7207, 8553, 9716, 11831, 12127, 13258. 
Dicranomyia stigmosa. 
Dicranomyia stigmosa Scudd., Bull. U. S. Geol. Geogr, Surv. Terr., iti, 746- 
748 (1877); Zert. Ins. N. A., 568-570, pl. 5, figs. 16, 17, 25-27, 42, 43, 68, 
69 (1891). 
? Tipula tecta Scudd., Bull. U.S. Geol, Geogr. Surv. Terr., ili, 752-753 (1877) ; 
Tert. Ins. N. A., 577; pl. 5, figs. 46, 47 (1891). 
In the description given of this species I have inadvertently 
