October, '08] JOURNAL OP ECONOMIC ENTOMOLOGY 313 



ventral setae are small and fine. The third pair of ventral set« are long and 

 stout. The caudal setse are of medium length. The accessory setae are not 

 present. The females measure from 180 to 220 microns long, while the males 

 average about 170 microns in length. 



The Hibernation of the Mites 



Many species of mites hibernate under the bud scales, but the loca- 

 tion of the winter quarters of these two species seems not to have been 

 determined. While occasionally a specimen may be found in hiding 

 under a bud scale, the buds generally harbor only a very few, which 

 represent but an exceedingly small fraction of the mites that have 

 been produced for that season on the tree. Shinier (Trans. Amer. 

 Entom. Soc. II, 1869, p. 319) suggested that it is probable that they 

 pass the winter, perhaps in the egg stage, on the ground around the 

 tree and in early spring ascend the trunk. Our observations on the 

 hibernating habits of these mites (P. qiiadripes and P. aceris-cru- 

 mena) show that thej^ seek protection just under the loose edges of 

 bark, about the stubbed ends of broken twigs and limbs and about 

 scars of wounds caused by hail and other agencies. For the past 

 two years the beginning of the migration of these mites from the leaves 

 to hibernating quarters occurred on July 12 and 10 respectively. On 

 badly infested trees the mites have been seen assembled in such large 

 numbers on portions of the tree as to give a very distinct reddish 

 tinge to the bark. Tlie mites are only to be found in scattering num- 

 bers on the trunks of the trees near the ground. If it should become 

 desirable to spray for these mites, protection could unquestionably be 

 obtained, by the thorough treatment of the trees with an efficient eon- 

 tact insecticide when the mites are migrating in their largest numbers 

 on the bark, or when they are established in their winter quarters. 



NOTES FROM CONNECTICUT 



By W. E. Brittox, Islew Haven, Conn. 



The fall canker worm, Alsophila pometaria Harris, has caused more 

 damage in various portions of the state than for several years. Apple 

 orchards in the vicinity of Stamford, in Madison, and in Stonington, 

 have been stripped and presented a brown appearance by the middle 

 of June. These orchards, of course, received no spraying or other 

 treatment to destroy the insect. Not only have the apple trees been 

 damaged, but many other kinds of shade and woodland trees have 

 also been more or less injured by the canker worms. Elm trees in 



