102 NEW YORK STATE MUSEUM 
It is then much darker in color, being rather dark brown with 
well marked segments, a minute head and the posterior extremity 
truncate. The general appearance of the larva is shown at 
figure 1. 

Fie. 1 Psilarosae: 5 malefly, 2 female fly: lateral view ; a, antennaof male; 4, full grown 
larva, lateral view ; c, spiracles of same; d, anal extremity from the end; e, puparium ; f. young 
larva; g, anal segment from side — flies, young and mature larva, and puparium, eight times natur J 
size ; other portions more enlarged. (After Chittenden, U.S. Dep’t Agric. div. ent. Bul. 33, n. s. 
1902) 
Natural enemies. Very little has been recorded concerning the 
natural enemies of this species. Curtis found a small four 
winged fly which he described as Alysia apii and presumed 
was a natural enemy of this pest. 
Remedial measures. This species, like others which exist under 
ground, is difficult to control with insecticides, and our principal 
dependence must therefore be based on cultural methods which 
may serve to avert attack. 
The standard kerosene emulsion, 1 part to 10 of water, may be 
sprayed along carrot rows with knapsack or other sprayer. Sand, 
land plaster or ashes, with which kerosene has been mixed at the 
rate of 14 pint to 3 gallons, may be sprinkled along the rows. 
These, with the exception of crude carbolic acid, a pint in 5 
gallons, are about the only substances which have given good 
results. Dr Fletcher states that in Canada one or the other of 
these applications should be made weekly during June from the 
time the roots begin to form, and particularly after the rows have 
been thinned. 
Late sowing has also been practised to great advantage, and a 
number of persons have found it to be of considerable value. 
