ctffecliiig the Tu/nip-Ci op f. 
120 
27th. On pulling up tho stalks of some cabbages recently cut, 
I found the roots enlarged, lumpy, and carious ; and on opening 
them they were hollow, uith the maggots of the cabbagc-lly full- 
grown in cavities, several of which hatched in May, 1841, to- 
gether with another fly.* 
Two other species of similar flics are noticed by Bouche as 
attacking these croj)s : one he calls, after Meigen, 
10. Anthomyia gnava. Horns pubescent; eyes not hairy; 
legs black. Male with a black thorax ; body linear, cinereous, 
fasciated with testaceous and black doral spots. Female cinere- 
ous ; body with a blackish dorsal line, dilated at the base : 
length 3 lines.f 
The larva* of this fly are found on the Continent during the 
autunm in turnips, eating cavities in the bulbs ; but they have 
not yet been observed in England. The other species described 
in Bouche's work is likewise unknown tome; but as it will, in 
all probability, soon be detected in this country, I will give a 
short description of the insect, which bears the name of 
11. Anthomyia trimaculata : it is like A. carnuria of Meigen, 
but smaller ; light-grey, varying with the light to white ; thorax 
with four black interrupted dorsal stripes; scutel with three 
brown spots ; legs black ; abdomen chequered with brown, and 
a broad black dorsal stripe. The female is altogether paler, 
with the apex of the thighs and tibiae reddish-brown : length, 
3i lines. The maggots of this are similar to the others, and 
they are five lines long : the pupa also is scarcely to be distin- 
guished from them : it is 3 lines long. 
The maggots are found in summer and autumn in company 
with A. Brassic(£, in cabbage-roots, which they destroy. They 
remain pupaj three or four weeks, and the latter generations 
winter in the earth under that form, and produce flies in the 
spring : the female flies are tolerably abundant in fields and 
gardens. 
The last species I have to record was sent to me from North- 
umberland by Mr. T. H. Scott, the 21st July, 1841. He says, 
" My servant, who has been hoeing the turnips, tells me these 
larvae are always found in the roots, and not in the surrounding 
soil. Since the late rains they have decreased, and it was with 
some difticulty the few I transmit could be found in two acres." 
They were taken out of the roots, several of which were sent 
(fig. 34) to show the mischief done by the maggots and the little 
rove-beetles : precisely at the same period of the year, on cutting 
* Einnerus ceneus. Vide Gardener's Chron., vol. ii. p. 252 ; and Cui'tis"s 
Brit. Ent., pi. and fol. 74'J. 
t Meigen's Syst. Beschr., vol. v. p. lG-1, No. 142. 
VOL. IV. K. 
