124 JOURNALi OF ENTOMOLOGY AND ZOOLOGY 



of the cotton l)elt, including the states of North Carolina, South 

 Carolina, Georgia, Florida, and Louisiana, and the southern 

 parts of Mississippi and Alahama; (c) a large area in the region 

 of the north central states including the states of Iowa and 

 Illinois, the southern parts of Wisconsin and Michigan, and the 

 northern parts of Ohio and Indiana; (d) the Willamette Valley 

 in Oregon; (e) the interior regions of California, including the 

 valley of the Sacramento and San Joaquin rivers ; (/) the south- 

 ern California citrus region. That the common spider mite is 

 generally distributed in these regions is shown, not only by the 

 authentic reports of its occurrence in them but also by the state- 

 ments of specialists in the Acarina as to its general distribution. 

 That the species is generally distributed in the New England 

 states and New York State is shown by the work of Harvey, by 

 the statements of L. H. Bailey and others. Besides this the 

 writer has had much personal experience with the red spider 

 in New York State. The general distribution of the pest in the 

 southeastern part of the cotton belt is established by the state- 

 ments of Morgan and McGregor. Morgan stated in his bulletin 

 on this pest from the Louisiana Experiment Station that the red 

 spider was common in any part of the state of Louisiana ; while 

 McGregor gives us many records of its injury in the cotton belt, 

 but states that it was only from the southeastern portion of the 

 same that complaints of an alarming nature were received. Mr. 

 E. S. G. Titus states that the red spider has been found in several 

 localities in North Carolina. In the north central states we have 

 many reports of the species in Illinois given by Professor S. A. 

 Forbes and his assistants. The writer himself has by personal 

 examination found the species in many parts of Illinois and Iowa. 

 I have also observed it in southern Wisconsin and in Ohio. In 

 the Willamette Valley of western Oregon the writer has made 

 many records of the species, and has been repeatedly told of its 

 jaresence and injury by others. The general occurrence of the 

 red spider in the interior of California is shown by the recent 

 work on this pest by Parker. Quayle states that the common 

 species of red spider is distributed in southern California on 

 ornamental shrubs and vegetables. 



