956 CHARLES PauL ALEXANDER 
Toxorhina muliebris (O. 8.) 
1865 Tozxorrhina muliebris O.S. Proc. Ent. Soc. Phila., p. 233, 
Toxorhina muliebris is the commonest species of the genus in the 
United States, with a rather wide range thruout the Northeastern States. 
The adult flies suck nectar from various flowers, such as the following: 
Rhamnaceae, Ceanothus americanus Linn. (Banks); Ericaceae, Clethra 
alnifolia Linn. (McAtee); Apocynaceae, Apocynum medium Greene 
(McAtee); Compositae, Solidago canadensis Linn. (Knab). 
The immature stages are unknown, but from Mrs. Tothill’s tent-trap 
observations they are presumably spent in mud, since adult flies were 
found in her traps set over wet, sedgy spots near Ithaca, New York. It 
may be, however, that the insects live in fragments of decaying wood 
which might be buried in this mud, since such a habitat conforms more 
closely to that of Elephantomyia, which is apparently oe related to 
Toxorhina. 
Eriopterine No. 1 
A very curious larva, which has not been reared, has been found in 
various places near Ithaca during the past few years. It is a small, pale 
larva, very delicate and almost diaphanous in appearance, at the posterior 
end with five flattened black plates with serrated margins, and with its 
thoracic segments capable of considerable lateral extension. The larva 
is undoubtedly ‘an eriopterine, but it introduces a type of spiracular 
disk that has not been found elsewhere in the tribe. The writer finds 
it difficult to believe that this curious larva can belong to any of the 
eriopterine genera discussed in this paper, and yet there are very few 
possibilities remaining; and one of these (Cryptolabis) does not occur 
in the habitat frequented by this larva. The genus Atarba, whose 
immature stages are still wholly unknown, is a possibility. Empeda, which 
the writer considers to be a subgenus of Erioptera, has not been 
reared and must also be considered as a possibility. If this is the larva 
of Empeda, the group at once assumes full generic rank as given it by 
Osten Sacken, but occupying an isolated position and no closer to Gono- 
myia than to Erioptera. The larvae of this species were found commonly 
on Bool’s hillside, at Ithaca, where they occurred in association with 
numerous other crane-fiy larvae discussed elsewhere (page 781). The 
