1018 I. M. HAawtey 
It is probable that the insect may be found on weeds in New York and .is 
injurious to beans only when they are planted after other infested hosts. 
THE WHEAT WIREWORM 
(Agriotes mancus Say) 
Larvae of the wheat wireworm, A griotes mancus (Coleoptera, Elateridae), 
may be found each year feeding in the roots of field beans near Perry, New 
York (Plate LXX, 4). This is especially noticeable when the plants are 
already weakened by the dry root-rot caused by Fusarium martii phaseolz. 
The taproot, part y destroyed by the disease, is a place of easy entrance 
for the larvae (fig. 96, D, page 1012), and when once inside they frequently 
eat their way upward as far as the first leaves. Several specimens may 
be found in a single plant, and if the root-rot also is present the plants 
often have a drooping, wilted appearance. It is usually impossible to 
absolutely distinguish the injury caused by the insect from that caused by 
the disease. Rarely have plants with healthy roots been found to contain 
wireworms. 
Larvae of this species have also been found feeding in the roots of lamb’s- 
quarters and of ragweed growing in bean fields. The life history of the 
insect covers a period of three years (Hyslop, 1916). Adults were taken 
by sweeping during May and June in 1919 
As far as the writer has observed, serious injury from wireworms has 
been restricted to single plants, or, at most, to small parts of a field; and 
their presence may be explained by the practice of planting beans ‘after 
sod, which is the normal host of the insect. 
THE RED SPIDER 
(Tetranychus telarius L.) 
In a summer’ that is hot and dry, beans may suffer from the red spider, 
Tetranychus telarius (of the order Acarina) (Plate LX XI,5). In 1918 the 
plants on the experimental field at Perry were covered with these pests; the 
leaves turned yellow and the growth was stunted. The total rainfall 
at Perry during July and August of that year was only 2.37 inches, whereas 
the normal for these two months is 6.05 inches. In 1919 the red spider 
was common in some parts of Genesee, Orleans, and Niagara Counties, 
where again the rainfall was below normal. It may be. occasionally found 
on beans in any year, but when the growth of leaves is luxuriant the slight 
damage that it causes is easily overlooked. This mite has many native 
hosts, and fields that have weeds along the edges or between the rows 
usually show a heavier infestation. 
Injury by T. telarius may be recognized by many small brown spots 
on the upper surface of the leaves, where the plant cells are killed. — 
On the under surface of the leaves, small webs may be observed, and the 
small yellow, green, or red mites may be found crawling or feeding among 
