31 
Var. «, Axillary spot of the wings wanting.* 
8. Tips of tarsi whitish. 
Specimens have been taken almost weekly, from the middle of 
June, till the fore part of September, in fields of flowering wheat, 
among the grass of plats contiguous to dwellings, and upon the 
windows of houses. I do not doubt but its habits are very similar 
and perhaps identical with those of the tritici, and that in proportion 
to its numbers it is equally destructive. The investigations of another 
year, may, I hope, enable me to furnish something more definite 
upon this most interesting subject. 
SPECIES RESEMBLING THE WHEAT-FLIES. 
We have what appear to be several species of cecidomyides, 
allied to our wheat-flies in size, in the number and form of the joints 
of the antenne, and more or less in the colors of their bodies. 
Among objects so exceedingly minute, and so closely related to each 
other, a most patient and critical study of a large collection of 
specimens, both in their recent and their dried state, is indispensable, 
in order to trace out with accuracy and define with precision each 
of these species. Perplexity and confusion will be the inevitable 
result of a hasty or superficial performance of a work of this cha- 
racter. It is hence that I shall at present venture to name and cha- 
racterize but two of these species, whose marks are so evident and 
distinct as to render their recognition comparatively easy, yet whose 
colors are so analogous to those of the clear-winged wheat-fly that 
they would be confounded with it by ordinary observers, unless 
aware of their distinctive marks. I am hits acquainted with these 
species in their perfect state. 
A few specimens occurred to my notice about the middle of the 
month of August, having the abdomen more tinged with red than in 
ERE IES ESET RL PACED 
* On a careful re-examination of all my specimens while copying this paper for the 
press, and a reference to the dates and situations where each was collected, I discover 
that all those which have been gathered from wheat-fields are of this variety, having 
but six spots; and farther that the spot on the inner margin nearest to the base of the 
Wing is situated in the middle of the anal cell, thus leaving the space about the apex of 
the anal nervure perfectly hyaline, Should the particulars here specified prove to be 
permanent and constant, as I believe they will, it must lead to a separation of this as 
a distinct species from the caliplera; in which event, the specific name cerealis might 
appropriately be bestowed upon the real wheat-fly having but six spots. 
