546 PROCEEDINGS OF THE ACADEMY OF [Oct., 
ranging from Maine, New Hampshire and Vermont south (in the 
mountains) to Mt. Toxoway, North Carohna, the type-locaUty. 
In New York and New England it flies from June 11 to August 31, 
being quite numerous in suitable localities throughout the latter 
half of June and all of July. It is found in cool, shady spots, usually 
near running water or springs, being very often found in small dark 
ravines or along shaded runs. They frequently lurk under dark 
culverts after the fashion of DoUchopeza and Oropeza. 
Bittacomorpha (Bittacomorphella) saokenii Roder. 
Northwestern United States and western Canada, ranging from 
Queen Charlotte Isle, British Columbia, south to California and 
east to Colorado. The records indicate that the insect is on the 
wing in June and early July. 
The species of Bittacomorpha may be separated by the following 
key: 
1. Wings with the apical cells without a strong pubescence; meta- 
tarsi swollen and white basally. (Subgen. Bittacomorpha.) 2 
Wings with the apical cells with a sparse strong pubescence; 
metatarsi not swollen, and without white near the base. 
(Subgen. Bittacomorphella.) 3 
2. Dorsum of thorax deep velvety black with a white median line; 
cell Ri of the wings one-third as long as Rb. (Eastern North 
America.) clavipes Fabricius.^^ 
Dorsum of thorax shiny black without a white median line; cell 
Ri of the wings one-half as long as R^. (Western United 
States.) occidentalis Aldrich.^** 
3. Tibiae and metatarsi dark brownish black without white (except 
the extreme tip of the latter in some specimens), segments 
two and three of the tarsi pure white. (Western North 
America.) sackenii Roder.^^ 
Tibise black with a broad white band beyond the base; metatarsi 
with more or less white at the tip, broadest on the fore legs, 
narrowest on the hind legs; segments two and three of the 
tarsi pure white. (Northeastern United States.) 
jonesi Johnson.^^ 
Explanation of Plates XXV to XXXI. 
Plate XXV. — Fig. 1. — -Wing of Geranomyia canadensis Westwood. 
Fig. 2. — Wing of G. distinda Doane. 
Fig. 3. — -Wing of G. intermedia Walker. 
Fig. 4. — Wing of G. diversa Oisten Sacken. 
J'ig. 5. — Wing of G. tibialis Loew. 
" Tipula clavipes Fabricius; Spec. Insect., vol. 2, p. 404 (1781). 
^° Bittacomorpha occidentalis Aldrioh; Psyche, vol. 7, p. 201 (189.5). 
-' Bittacomorpha sackenii Roder; Wien. Entom. Zeit., p. 230 (1890). 
-'' Bittacomorpha jonesi Johnson; Psyche, vol. 12, pp. 7.5, 70 (1905). 
