145 
The Potato Flea-beetle 
Bpitrix cucumeris Harr. 
{Crepiododera cucunieris Harr.) 
Potato leaves are often riddled with small holes as if they had 
been the target for a discharge of shot. Such injury is the work of 
flea-beetles. The life history and habits of the potato flea-beetle 
Fig. 39. Potato Flea-beetle, Epitrix cucumeris, adult. Enlarged 
as indicated. 
(Fig. 39) are essentially the same as those of the cabbage flea-beetle, 
which is discussed on pages 11 3- 114. 
Remedies. — The best remedy is spraying with Paris green, or 
arsenate of lead, and Bordeaux mixture, as recommended for the 
potato-beetle (page 142). Potatoes may be thus protected against 
the potato-beetle, the flea-beetle, and the blight. Other remedies 
applicable to this pest may l:)e found on page 114. 
The Potato Plant-louse 
MacrosipJuiin solamfoUi Ashm. 
(Nectarophora solanifolii, Siphonophora solaiiifolii) 
The potato plant-louse is often a very troublesome species, 
densely infesting the tops of the plants and soon stunting or even kill- 
ing them. It is so much like the notorious and destructive pea-louse 
that the two species can not be distinguished without a closer exam- 
ination than the ordinary observer is likely to make. Altho com- 
monly pale greenish, there is a red variety of this species which, dur- 
ing the summer, is often as abundant as the commoner green form. 
The life history and natural enemies of this aphis are similar to 
those of other plant-lice already described. 
Remedial Measures. — The only available remedies are those 
suggested for other plant-lice ; namely, kerosene emulsion and soap 
solutions (page 153). 
