924 CHARLES PauL ALEXANDER 
Genus Tricyphona Zetterstedt 
1838 Tricyphona Zett. Ins. Lapponica, Dipt., p. 851. 
1856 Amalopis Hal. Ins. Brit., Dipt., vol. 3, add., p. xv. 
1860 Crunobia Kol. Wien. Ent. Monatschr., vol. 4, p. 393. 
1869 Amalopis O.S. Mon. Dipt. N. Amer., part 4, p. 260. 
There are about forty known species in the genus Tricyphona. Almost 
all of these are Holarctic in their distribution, but two occur in the 
Australasian region. The carnivorous larvae live in moist earth. The 
following key divides the local species: 
ile 
T. auripennis and T. calcar late spring species, and 7. katahdin and 17 
autumnalis late summer species. 
- Coloration of body light brown; m-cu obliterated by the fusion of Cu on Ms. [Proc 
. Seape of antenna yellowish or brownish yellow, the flagellum much darker, brown 
Cell M with a supernumerary cross-vein; wings heavily clouded and marbled with gray. 
[Amalopis hyperborea O. 8. Proce. Acad. Nat. Sci. Phila., p. 292. 1861.] (Plat 
25) UT a RoI ee Coa ee ee ea Sle Pear ONE Re a Os oo © T. hyperborea (O. $. 
Cell M without a supernumerary cross-vein; wings with the markings sparse, confined 
to the: region: of the veins. 2.:. /cs222) in 6 bie Sa nels sae eee 2 
. Cell R: short-petiolate; costal margin of wings infuscated. [Amalopis inconstans O. §. 
Proc. Acad. Nat. Sci. Phila., p. 247, pl. 3, fig. 32. 1859.] (Plate XLII, 177.) 
T. inconstans (0. §.) 
Cell R2 sessile; costal margin of wings not infuscated..................0. 002-0 eeeeee ad 
. Wings subhyaline or hyaline, unspotted...................5250-- 55s ee eee. Soe 4 
Wings spotted or marked with darker... 2.0.0.0... sna ee 
Stigma of wings brown; male hypopygium conspicuously hairy; wings of female an 
atrophied. [Can. Ent., vol. 49, p. 30-31. 1917.] (Plate XLII, 179, 180.) 
T. autumnalis Alex 
Stigma of wings pale; male hypopygium small, not conspicuously hairy; wings of femal 
normally developed. [Amalopis calcar O. S. Proce. Acad. Nat. Sci. Phila., p. 247 
1859:]° /¢Plate XGGLT, 178) soe eos eee ‘T. calcar (O. 8. 
. Fusion of Cu: with Ms; extensive, subequal to the part of M:; before the cross-vein mi 
[Amalopis auripennis O. S. Proc. Acad. Nat. Sci. Phila., p. 247. 1859.] (Plat 
EXCITE SIRS Ban ecg eaten tate aN ae rr T. auripennis (O. §.) 
Fusion of Cu with M; transient if present at all, usually less than one-half of the par 
of MM; before the cross-vein m......5.-..2-. +. esaces 356 eo Ee eee ( 
Acad. Nat. Sci. Phila., p. 598-599, plate, fig. 1914.] (Plate XLII, 183.) 
T. katahdin Alex 
Coloration of body gray; m-cu present... ). 22... 0.252. - ee eee 
abdominal tergites brown, the margins of the segments pale producing a banded appeal 
ance; wings with large rounded clouds at the tips of the longitudinal veins and alon 
the cross-veins. [Amalopis vernalis O. 8. Proc. Acad. Nat. Sci. Phila., p. 291. 1861 
(Plate sXe. D> W858). Seek ee ee So a T. vernalis (0. 5 
Seape of antenna dark brown, concolorous with the flagellum; abdominal tergites brow! 
unbanded; wings with the pattern almost obsolete, reduced to tiny dots and seam) 
[Proc. Acad. Nat. Sci. Phila., p. 538-540 pl. 28, fig. 53. 1916.] (Plate XLII, 184 
Te paludicola Ale: 
In the local fauna, 7. vernalis and T. paludicola are early spring species 
