252 STATE BOARD OF AGRICULTURE. 



in the caudal region where they become somewhat interrupted and confused. This, in a 

 lesser degree, is true in the thoracic region, where one or two extra lines are added on 

 each side. 



On each side is a broad egg-yellow stripe including the spiracles which are white 

 with black borders. The underside is dirty-white. 



The life-history of this insect is very much like that of the canker-worms. The female 

 is wingless, like that of the canker-worm, and the male is winged, but larger than the 

 moth of the canker-worm. It is buff-brown in color. The eggs are said to be laid in the 

 fall, and the young emerge in May, here in Michigan. On May 22, 1891, the young 

 were from one-quarter to one-half inch long. On June 11th the larvae were nearly all 

 full grown and many of them had gone into the ground. 



The remedies to be used against this insect are the same as those for the canker- 

 worm, viz.: banding the trees and spraying with the arsenites. ' 



PHIGALIA STRIGATAPJA. 



Accompanying the lime-tree inch-worm and often feeding on the same trees, numbers 

 of caterpillars have been seen for the past four years. They are dirty brownish-white 

 with longitudinal black lines, and with spiracles black. On the intermediate abdominal 

 segments and on the 11th are small, elevated, setose points. The head is dirty-white 

 with black mottlings. The ventral part of the body is less distinctly lined. The feet are 

 black. The length of a full-grown specimen is usually about one and three-sixteenth 

 inches. 



The caterpillars appear in May and last about five weeks. On the 22d of May, 1901, 

 the young loopers were from one-quarter to one-half inch long. On the 22d of June all 

 had gone into the ground to pupate, both in my cages and in the woods. There were 

 found feeding on wild cherry, hard maple, beech, basswood, and blue beech. They are 

 said also to feed upon apple, rose, blackberry, elm, and other plants.* 



Fig. 17. — Phigalia strigatarla larva or caterpillar. From photograph enlarged. Original. 



On June 5, 1900, specimens of this larva? were collected and placed in a suitable 

 breeding cage. Early next spring a single adult winged moth appeared, which agrees 

 with the description of Phigalia strigataria.f The adult males of this species are grey 

 in color, with brownish-black lines running across the wings. They measure a little 

 less than an inch and a half from tip to tip of the extended wings. The females are 

 said to closely resemble those of the lime-tree inch-worm, being almost wingless, the 

 wings being so short that they reach only to the rear end of the thorax. Being rudi- 

 mentary, they are of no use for flight and the female is obliged to climb rip the tree 

 just as are the females of the canker-worms and lime-tree inch-worm. The males of 

 this species are on the wing about the middle of April, being often attracted to the 

 electric lights. 



The methods of suppressing this insect will be the same as those recommended for the 

 inch-worm and the canker-worm. 



* Dr. Otto Lugger, Bulletin fit. Minnesota Experiment Station, 1898, p. 249. 

 t U. S. Geological Survey Terr. Vol. X, Monographs p. 407. 



