898 CHARLES Paut ALEXANDER 
Rumex aquaticus. The two local species live in organic mud in swamps, 
and both the larvae and the pupae are decidedly eriopterine in appearance. 
The local species of the genus Rhamphidia may be separated in accord- 
ance with the following key: 
Rostrum short; legs yellow, tips of femora and tibiae black; wings tipped with dusky. 
[Dipt. Exot., 5th supp., p. 17. 1855. Osten Sacken, Mon. Dipt. N. Amer., part 4, 
p. 105-106. 1869.] (Plate D,O,@),G i) IE DA) eee oe ameter rede 2 R. flavipes Macq. 
Rostrum long; legs uniformly dark brown: wings uniformly subhyaline, not tipped with 
dusky. [Proe. Acad. Nat. Sci. Phila., p. 498-499, pl. 25, fig. 14. 1916.] (Plate XXXII, 
11 Vea A nes a Ys ogee oN eens Meg ain RE ENOCH nS ao g R. mainensis Alex. 
Genus Elephantomyia Osten Sacken 
1859 Elephantomyia O.S. Proc. Acad. Nat. Sci. Phila., p. 220. 
The genus Elephantomyia includes about eight species, found in North 
America, Europe, Africa, and eastern Asia. The complete wing venation 
separates the flies from all other genera with an elongate rostrum, except 
the Oriental genus Rhampholimnobia Alex. The immature stages of the 
known species are spent in decaying wood. 
Elephantomyia westwood: O. 8. 
1869 Elephantomyia westwoodi 0.8. Mon. Dipt. N. Amer., part 4, p. 109, pl. 1, fig. 5. 
The species Elephantomyia westwood: is a curious fly inhabiting cold 
Canadian woods and bogs, where it is found on the wing from late June 
into August. R. C. Shannon collected larvae at Washington in late 
November of 1912, and again on May 2, 1913, and reared the fly. It had 
been bred before by Johnson. 
The adult is yellow with the abdominal segments ringed caudally 
with brown and the wings having a distinct brown stigma. The large 
square cell /st Mz is a conspicuous feature of the venation (Plate 
X XXIII, 44). 
Genus Toxorhina Loew 
1835 Limnobiorhynchus Westw. Ann. Soc. Ent. France, vol. 4, p. 683. 
1851 Toxorhina Loew. Linnaea Entomol., vol. 5, p. 400. 
1869 Tozxorrhina O. 8. Mon. Dipt. N. Amer., part 4, p. 109-114. 
The small genus Toxorhina includes about nine described species, 
most of which are from tropical America. The exceedingly reduced 
radial sector is the most interesting characteristic of the adult. The larval 
