THE MOUNT DESERT REGION 265 



Liparis Ochsenheimer 



L. dispar Linn. ( 89(55 ). The Gypsy Moth. Reported in 1919 

 from three different places on the Island but not seen by 

 the writer until August 10, 1933, when one or two indi- 

 viduals were seen at the laboratory and a careful search 

 revealed large numbers. With cooperation the infestation 

 was stamped out by those on whose property it occurred. 

 There have been several infestations since, and the numbers 

 are increasing rapidly. They will soon be a major problem 

 on the Island. 



Stilpnotia Westwood 



S. salicis Linn. (3966). The Satin Moth. First reported in 

 The vicinity of Boston in 1920. It has gradually spread 

 northeastward, and this is the most northerly record at the 

 present time. Bar Harbor at light, July 31, '35 (Br.). The 

 larvae feeds on poplar and willow. 



Nygmia Hiibner 



N. phaeorrhoea Don. (3967). The Brown-tail Moth. Abun- 

 dant during 1911-1914. Then a few were seen yearly until 

 1944, when they appeared in large numbers from the west, 

 necessitating town control. 



Lasiocampidae 



Tolype Hiibner 



T. velleda Stoll. (3978). A common form at light in Sep- 

 tember. 



T. LARicis Fitch. (3987). Penikese at light; Bar Harbor 



(Br.). July 19-Aug. 30. Not common. 



Malacosoma Hiibner 



M. americaxa Fab. (3989). The American Tent Caterpillar. 

 Always present. In great numbers '35 and '36 and almost 

 none in '38. Show great variation. The larvae form large 

 tent-like webs on the apple, cherry, and other trees. The 

 caterpillars are heavily parasitized by tachinid flics. 



