Bui. 4ic, U. S. Dept. of Agriculture. 



Plate VII. 



95.61 



Diagram Illustrating Red-Spider Dissemination by Means of Water Dispersal, 



'lopotTfiphic survey mu[) of foilon fjclij sliowiiij; corjloiir iiri(« and coUon row.s. Red 

 .spjfler.s travf'lwl afoot, from iufc .led viol<-(, borders in dooryiird at A acro.s.s liij;liwuy, Jf 

 Tl fe«t, wide, lo'oiion in hit'li end of fiijd .it, r. I'rorn Ihi.s primary infcsfaUoii in'ites 

 werf;di.sl(xlt'ed durini.' heavy ruins urjd earried down the field in the surface waU-.r hofweon 

 the rows to the low point at IJ. Here, upon hecominK strandefl, they estuljlisliiid fhom- 

 selves upon the cotton, giving rise to a new Infestation. (Original.) 



^^ 



