900 CHARLES PauL ALEXANDER 
Both larvae and pupae live in cases on rocks, often in very rapid water, 
and the larvae are very pediciine in appearance. Mating takes place 
on the stones along the streams in which the larvae live. 
Antocha saxicola O. 8. 
1859 Antocha saxicola O.S. Proc. Acad. Nat. Sci. Phila., p. 219. 
1859 <Antocha opalizans O. 8S. Proce. Acad. Nat. Sci. Phila., p. 220. 
Antocha saxicola is a common fly, which may be mistaken only for 
a Dicranomyia but is readily distinguished by the very prominent anal 
angle of the wings (Plate X X XIII, 48), an uncommon feature in crane-flies. 
The milky-white color of the wings, and the very long, straight sector, 
are noteworthy characters. There are two distinct color phases which 
may represent distinct species when better known. The gray form has 
been described as A. saxicola, the red form as A. opalizans. 
Genus Dicranoptycha Osten Sacken 
1818 Marginomyia Meig. Syst. Beschr., vol. 1, p. 147. 
1859 Dicranoptycha O.S. Proc. Acad. Nat. Sci. Phila., p. 217. 
There are about nine described species of Dicranoptycha, six from 
North America, two from Europe, and one from Africa. D. signaticollis 
v. d.W. (of Java) is a Libnotes. The immature stages are spent in 
rather dry soil in open woods. 
The following key separates the local species of Dicranoptycha: 
1. Large, wing over 10 mm.; wings deep reddish brown, the veins with short golden hairs; 
Rs elongate, nearly twice the length of ceil Jst M2. [Proc. Acad. Nat. Sci. Phila., 
Die USS ON i (Rlate AxeXCXa AQ i ec igri S Lit i a D. germana O. 8. 
Smaller, wing under 9 mm.; wings light gray or yellowish subhyaline; Rs shorter, about 
as long as or only slightly longer than cell Ist Mo........................0-0 00s 2 
2. Body coloration brownish gray; wings suffused with gray. [{Proc. Acad. Nat. Sci. Phila., 
DZS tole As ston 1S. 85 Ou) on (Plate wxeXexe ID oi) ke ey eee D. sobrina O. 8. 
Body coloration pale yellow; wings pale yellow. [Proc. Acad. Nat. Sci. Phila., p. 500-501, 
pl. 25, flew 12.9) 191 63) (Plate exe xoxcl Ih SOS) eee Se eeie cee ine D. winnemana Alex. 
There are three additional Austral species that may occur within the 
faunal limits considered by this paper. Of these, Dicranoptycha nigripes 
O. S. and D. minima Alex. have the tips of the femora blackened; 
D. tigrina Alex. resembles D. sobrina, but has the abdomen conspic- 
uously cross-banded with brown and yellow, not uniformly brown as in 
sobrina. 
