292 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 5 



December 13, 1888, specimens were received from Mrs. A. B. Wimer, 

 Franklin, Mich., with the complaint that they had made their way 

 into houses in large numbers. Five days later Mr. Pergande found 

 the mite in all stages of development, from egg to adult, some of the 

 eggs just hatching, on the trunk of an arborvitse in the grounds of 

 the Department of Agriculture. 



February 18, 1889, mites were received from INIr. C. L. Hall, Car- 

 pentaria, Cal. These were marked " Malva-weed mite." April 29 

 a section of twig of plum with eggs and one full-grown mite were 

 received from Mr. J. H. Casterline, Santa Rosa, Cal. 



June 6, some twigs of an unknown tree or shrub infested by these 

 mites were received from Mr. E. Shipley, James Valley P. 0., Oregon. 



August 21, a piece of bark of Cottonwood completely covered with 

 the eggs of these mites was received from Mr. H. W. Turner, Valley 

 Springs, Cal. The specimen was said to have come from Tuolumne 

 County, Cal., at an elevation of 8,000 feet. 



On December 12, 1889, the writer, then stationed at Lafayette, 

 Ind., observed these mites swarming into a residence through crevices 

 about doors and "windows. When they first appeared, about the 

 5th inst., they seemed to be full grown, but later there were many 

 young also making their way into the houses, Thej' showed no dis- 

 position to infest roses or geraniums growing in pots in windows, 

 but would swarm upon the glass of these same windows. 



Januarj" 28, 1890, specimens of the mite were received from Mr. 

 L. H. Elhs, Wilmington, Ohio. On May 26, 1890, an empty egg- 

 mass belonging to a species of spider, taken from the stone founda- 

 tion of a house, contained numerous young of these mites. They 

 were received from Mr. B. H. Roberts, North Chili, N. Y. 



February 19, 1892, specimens of this mite were received from Mrs. 

 I. Smith, Williamsport, Ind., with the complaint that houses w^ere 

 badly infested by them. April 15, eggs of this inite were received on 

 a branch of cherry from Mr. J. C. Sharps, Portland, Ore. May 17, 

 the same mite was received from M. E. Russell, Hartford, Conn. 



July 28, 1893, section of branches of pear covered with eggs of this 

 mite w^ere received from Canon City, Col., by Mr. G. M. Dubois, 

 wiio stated that the mite was rapidly increasing in numbers, threaten- 

 ing to destroy large pear and apple trees. December of the same year, 

 specimens w^ere received from Mr. D. W. Coquillett, Los Angeles, 

 Cal., wiio found them in houses April 28, and eggs found upon prune 

 trees hatched these mites on May 10. 



June 12, 1894, a piece of apple twig covered with eggs of this mite 

 was received from Prof. T. D. A. Cockerell, Las Cruces, N. M. 

 October 16, 1894, alcoholic specimens were received from Prof. F. L, 



