77 
more abundant in the North. Possibly, however, this is only appar- 
ent, and it may be found to occur also throughout the South, as it 
was once taken at Texas College Station by Prof. F. M. Webster on 
wheat. The distribution taken from specimens in the National Museum 
includes, besides the District of Columbia and West Virginia, White 
Mountains, N. H. ; Beverly, Mass.; Connecticut; and Detroit, Mich. 
It is subject to parasitism, but the species of parasite does not appear 
to have been identified. 
The Native Clover Leaf-miner (Agromyza diminuta Walk.). — During 
the year 1900 this species was several times reared at this office by Mr. 
Th. Pergande and the writer from larva? mining the leaves of hedge 
mustard and smooth rock cress (Arabia laevigata) as well as cabbage. 
The adults issued from the third week in May to the first week in 
June, The species is treated in the Annual Reports of this Depart- 
ment for 1879 (p. 200) as Oscinis trifolii, and 1884 (p. 322) as 0. bras- 
sier. The above name is suggested to distinguish it from preceding 
forms. 
REMEDIES. 
Nothing - of value of a remedial nature has been attempted in the 
treatment of these leaf -miners, as far as the writer is aware, and it 
seems improbable that the application of any poisonous mixture would 
destroy the larvae at any stage of their growth. Fortunately none of 
these leaf -miners is, as a rule, very injurious; at least we have no 
records of injuries to large interests. In small kitchen gardens the 
insects can be controlled by clipping the infested leaves as soon as the 
larval mines are found, and destroying them. 
It is possible that the flies might be attracted to cans of decompos- 
ing turnip or cabbage leaves, slightly sweetened to assist fermentation, 
and that, if a slight amount of Paris green, arsenic, or other arsenical 
be dropped in these cans, it would effect the destruction of many flies. 
Such cans should be distributed about infested fields. The cabbage 
grower should know by observation when to expect the flies in his 
vicinity. 
THE FOUR-SPOTTED CABBAGE FLEA-BEETLE. 
(Phyllotreta bipustulata Fab. ) 
Throughout the summer, from May to September, during the past 
three years the writer has found this species of flea-beetle, though some- 
what sparingly, in the District of Columbia and neighboring parts of 
Maryland, on cabbage, turnip, hedge mustard (Sisymbrium offici- 
nale), charlock (Brassica arvensis), and shepherd's purse (Bursa bursa- 
pastons). 
Phyllotreta vittata, the striped cabbage flea-beetle, was comparatively 
rare the first year, and bipustulata was apparently more numerous 
than in former years, which will account for its being noticed on so 
