814 CHARLES PAauL ALEXANDER 
Limnobia triocellata O. S. 
1859 Limnobia triocellata O. S. Proc. Acad. Nat. Sci. Phila., p. 216. 
Limnobia triocellata is a common crane-fly in eastern North America. 
It is closely allied to the European L. bifasciata Schr., the immature stages 
of which have long been known. 
Johnson (1906:2) found larvae of this species in a fungus at Riverside, fi) 
Massachusetts, on August 21, 1904, which pupated on the 22d and emerged 
on the 30th and 31st, thus giving a pupal duration of about nine days.) 
Malloch (1915-17 b: 215-216) found larvae and cast pupal skins in an Agari-§f| 
cus at Urbana, Illinois, in September of 1915. The writer found larvaef| 
of Limnobia triocellata in a species of Fomes, associated with the larvae! 
of L. cinctipes and Ula elegans, at Gloversville, New York, on September | 
15, 1912. C. H. Popenoe found larvae at Great Falls, Virginia, on Sep-§f 
tember 8, 1912, in the fungi Hypomyces Lactifluorum (Schw.) Tul. and 
Armuillarza sp., the adult flies emerging on October 7, 1912. Other speci-} 
mens from the same place found on October 9, 1918, in a species of Clito-f) 
eybe, produced adults on October 20. Scores of specimens were taken in 
Boletus felleus at Bradley Hill, Maryland, the flies emerging on Julyj! 
16, 1914. 
Larva.— Length, 10-18 mm. 
Diameter, 1.2—1.4 mm. : 
Coloration a little more yellowish than that of Limnobia fallax. Species very close to 
fallax in all cetails. Ventral welt on abdominal segment 1 well developed, but dorsal welt 
lacking or very reduced. Spiracular disk (Plate XXVI, 94) rather large, exposed; circular 
spiracles large, separated by a distance less than the diameter of one; lobes surrounding 
disk small and indistinct. 
Pupa.— Length, 12-15 mm. Not very different from other species of genus described 
herein. 
Nepionotype.—— Great Falls, Virginia, September 28, 1913. 
Paratypes.— With the type. 
Genus Libnotes Westwood (derivation obscure) 
F 1876 Libnotes Westw. Trans. Ent. Soc. Lond., p. 505. 
Libnotes is a small genus (about thirty-five species) of rather large 
crane-flies, which are chiefly Oriental in their distribution altho three 
species occur in South and Central Africa. The species Libnotes per- 
kinst (Grimsh.) has been considered as being a Limnobia, but it seems 
