- REPORT OF THE STATE ENTOMOLOGIST 1902 101 
prising, since it frequently happens that a species introduced into 
anew country forms new habits and depredates on other plants. 
Mr Chittenden expresses the opinion that the insect has probably 
been established in Canada for at least 18 years and adds that it 
will probably not extend farther south than the upper Austral 
life zone. 
Life history. The life history of this species does not appear 
to have been worked out. The insect undoubtedly passes the 
winter in puparia and, according to Mr Chittenden, possibly as 
larvae. Since the larvae work on stored roots, the flies may de- 
velop in winter, as occurred at Washington and also in our own 
hreeding cages. This permits great irregularity in development 
and makes it impossible to accurately forecast the habits of the 
insect in the field. The flies probably develop rather early in 
the season and attack young carrots, which turn a rusty red 
color. An examination will show that the roots have been dis. 
figured with rusty patches, specially toward the tip. Both the 
flies and maggots are found throughout the warmer months, but 
the latter desert the roots and pupate in the earth. It is very 
probable that the last generation in a season descends much 
deeper than the earlier ones. The life cycle is completed in three 
or four weeks, as stated by Curtis, and no one appears to have 
determined the number of generations which may be produced. 
Mr Chittenden is of the opinion that there are at least two and 
probably more, and we are inclined to think his estimate is a 
conservative one. Miss Ormerod states that the fly goes into the 
ground for oviposition wherever it can find a crack or other 
opening about the roots, and that the maggots, after hatching, 
work their way into the roots and even when quite small destroy 
the entire lower portion. 
Description. The adult or parent fly is quite minute, measuring 
only about +4 inch in length and with a wing expanse of little 
more than ie inch. The color is dark green, by some authors 
given as black, and the insect is rather sparsely clothed with 
yellow hairs. The head and legs are pale yellow and the eyes 
black. ; 
The maggot or larva is pale yellowish white when half grown 
and when full grown presents a general resemblance to that of the 
cheese maggot, to which the species is somewhat closely related. 
