new species of Exotic Tipulide. 375 
Limnobiorhynchus canadensis. 
Westw., Ann. Soc. Ent. France, 1835, p. 684. 
Precedenti valde affinis. Differt thorace, proboscide, 
tibiarum apice halteribusque concoloribus, femorum 
apice infuscato, venis costalibus fuscescentibus. Long. 
corp. mas. 84 lin. Expans. alay. 7 lin. 
Hab. In Canada. In Mus. Hopeiano Oxoniz (olim 
nostr.). 
Another species, congeneric with Geranomyia unicolor, 
was described by Macquart in the ‘ Histoire naturelle des 
iles Canaries’ of Webb and Berthelot, and in his 
‘ Dipteres exotiques,’ vol. i. pl. 7, fig. 1, under the name 
of Aporosa maculipennis, and another species, A. fuscana, 
from the Isle of Bourbon. 
Of this genus six species are contained in the Berlin 
Museum, and have been described by Dr. Loew in the 
‘Linnea Entomologica,’ vol. v. p. 315. et seq. (1851), 
under the names of Aporosa insignis (Brazil), A. tristis 
(Brazil), A. rufescens (Porto Rico), A. tibialis (Brazil), 
A. virescens (St. Thomas), and A. valida (Chili). 
Dr. Loew (Monogr. Dipt. N. Amer. i. p. 10) gives 
Limnobiorhynchus as synonymous with Toxorhina, Loew 
(Bernstein und Bernstein-fauna. Schul prog, Berlin, 1850, 
p- 37, and Linn. Ent. v. p. 400, Berl., 1851, pl. i. figs. 
16—23), founded upon several species found in amber, 
and one living species from Porto Rico. 
In the Proc. Acad. Nat. Sci., Philad., 1859, p. 221, the 
Baron Osten-Sacken has discussed the question, and 
arrived at the opinion of the identity of Limno- 
biorhynchus and Toxorhina, establishing the genus 
Elephantomyia for my L. canadensis, of which he had 
obtained great numbers of both sexes from Trenton 
Falls. 
In the Proceedings of the Entomological Society of 
Philadelphia, vol. iv. p. 229, the same author has again 
reviewed the arguments in favour of the identity of the 
two genera, and has described two new species of Tozo- 
rhina, in addition to T. fragilis, Loew, named TJ’. magna, 
male and female, from New Jersey, and T’. muliebris, 
male, from Massachusetts. As the venation of the 
wings in the two sexes of 7’. magna is identical, he 
moreover considers that my statement of the difference 
