344 



Journal of Agricultural Research 



Vol. Ill, No. 4 



posterior carinae," both the writer and Mr. Gibson, who has made 

 many observations on this point, feel that this variety has been founded 

 on too slender grounds. 



Van Duzee's variety angulata has never been taken. 



DISTRIBUTION 



Osbom, in his paper (ii) on the genus Stictocephala, points out that 

 S. festina has a wide distribution and is found throughout the southern 

 and southwestern United States. It is certain that in these sections it 

 occurs in the greatest abundance, but its range is not limited to them. 

 (See fig. I.) Say (i) described the species from specimens secured in 

 Florida. In 1889 Provancher (5) reported the species in Ottawa, 

 Canada, and in 1890 Smith (6) gave New Jersey as a new locality. Later 



Fig. I. — Map showinE; distribution of the three-cornered alfalfa hopper {Stictocephala festina) in the 

 United States. The densely dotted area shows region of injurious infestation; the sparsely dotted area 

 shows region of occurrence in limited numbers. Original. 



than this (1894) F. W. Coding (8) gave the following localities: Virginia, 

 Pennsylvania, Georgia, Florida, Missouri, Texas, Iowa, l^Iontana, and 

 Colorado (Riley) ; New York and Connecticut (Van Duzee) ; New Jersey 

 (Smith); Canada (Provancher). That the species occurs in very lim- 

 ited numbers in the northern half of the United States is certain. 

 Osborn found in his travels of 1909 and 1910 that 5. lutea has a southern 

 boundary agreeing quite well with the northern boundary of 5. jestina. 

 The writer had the pleasure of examining alfalfa sweepings made by 

 Mr. R. N. Wilson at 12 different localities in Colorado and Utah during 

 the summer of 191 1, and although several species of Membracidae were 

 represented in the collections, not one specimen of 5. jestina was present. 

 The writer has observed the species in abundance throughout the South- 

 western States, and found it injuring alfalfa {Medicago sativa) at Yuma, 

 Tucson, Casa Grande, Tempe, Phoenix, Buckeye, andGlendale, Ariz., while 

 Mr. R. N. Wilson reported it in alfalfa sweepings at Sacaton, Ariz., a region 



