122 jouenaii of entomology and zoology 



Distribution Over the World 



The common red spider is nearly world wide in its distribution. 

 In Europe, where it has been known the longest, it is a serious 

 pest in the following countries: England, France, Germany, 

 and Italy. It probably is generally distributed in this continent 

 except in the northern part of Eussia and in the Scandinavian 

 Peninsula. 



In Nortli America the species is found from Ontario to Texas 

 in the eastern part of the continent, and from British Columbia 

 to Southern California along the Pacific Slope. It is also widely 

 distributed in the interior of the United States. 



The species is known from South America, Hawaii, and South 

 Africa, and is a serious jjest in Australia. 



We have questionable records of the species from the West 

 Indies and Mexico ; while it is very probably present in western 

 Asia and northern Africa. I have failed to find any record of 

 the mite occurring in India, or in the Philippines. 



Distribution in the United States 



The distribution of the common red spider in this country is 

 here given in the form of a map (see Fig. 1). Not only are the 

 authentic and questionable locality records given, but also the 

 regions where there is a known general distribution of the mite, 

 or those where there is probably a general distribution of the 

 same. 



By examining this map we notice that there are seventy-seven 

 authentic locality records of the species in the United States; 

 and in addition there are eleven questionable ones. It is also 

 noted that we have authentic records of this species occurring 

 in thirty-one different states, and in the District of Columbia. 

 We also have an unauthentic record of the species occurring in 

 one other state. 



Eegions of Known General Distribution 



These regions are six. They are here given: (a) The New 

 England states plus New York State; (b) the southeastern part 



