ENTOMOLOGY 301 



die and hind pairs being largely white. The moth is one of a few 

 that appear to be indigenous both in America and in Europe. 



The Willow Slug. A black, slimy worm frequently appears on 

 willows in Kentucky, and occasionally is found on poplar, both of 

 which may be pretty completely denuded of foliage by it when it be- 

 comes extremely common. It is to be recognized among the willow 

 and poplar frequenting insects by its dark color, and a row of eleven 

 bright yellow spots along each side of the body. The hind part of 

 the body is kept bent in a fashion peculiar to certain members of the 

 saw-fly family to which this insect belongs. It is provided with six 

 pairs of blue fleshy legs and a seventh pair of smaller ones is situated 

 at the hind end of its oody. The three well developed pairs of jointed 

 legs are uniformly dark in color like the head and body. When first 

 hatched it is pale in color, but assumes the characteristic dark hue on 

 moulting its skin. When fully grown it measures 0.72 to 0.80 inch 

 in length. Several broods appear each season. 



The fly which lays the eggs from which this slug hatches ap- 

 pears about willows at Lexington very early in spring, and the slugs 

 may be seen in large numbers on snrubby willows about the city 

 reservoir in April and May. The very small greenish eggs are in- 

 serted by the female fly in slits which she makes with her ovipositor 

 in the under side of the leaves. These cause the upper surface of the 

 leaves to become roughened with little mounds, each indicating the 

 position of an egg. The fly has four rather large thin membranous 

 wings, hyaline, but slightly smoky tinted, the veins blackish. At the 

 front margin at about the beginning of the outer third of the front 

 wing, is an elongate blackish region known as the stigma. Specimens 

 in the collection measure about 0.28 inch in length of body, are 

 blackish in general hue, marked above on the segments with yellow, 

 the body beneath largely yellow or green. 



The insect is a near relative of the rose slug of our gardens but 

 fortunately for our willows is not so generally distributed. Like the 

 rose slug it may be destroyed by spraying infested plants with pow- 

 dered white hellebore in water, or by the use in the same way of Paris 

 green and freshly slaked lime. 



Spraying with arsenate of lead, used at the rate of 5 pounds to 

 50 gallons of water, as soon as the young leaves are well developed 

 is the most satisfactory remedy for combating this pest. If the ap- 

 plication be made at that time, many of the adult beetles will be de- 

 stroyed and egg-laying prevented. The banding process undoubt- 

 edly does considerable good, but the labor involved in watching the 

 bands renders the cost out of proportion to the good accomplished. 



The Locust Leaf Miner. In many sections the locusts suffer so 

 severely as to cause the browning and shedding of the leaves, large 

 areas appearing as if scorched by fire. The adult is a flattened bee- 

 tle about y inch in length. The general color is red, broken by a 

 medial line, with head, appendages and under surface black. The 

 wings are deeply dotted with fine punctures. 



The winter is passed in the adult stage under trash in the vicin- 

 ity of the feeding ground. In the spring the beetles emerge soon 



