224 ENTOMOLOGICAL SOCIETY 



currences throughout New Jersey, southeastern Pennsylvania, 

 southern Connecticut,' and in the upper austral finger which ex 

 tends up the Hudson river, lead to the opinion that it is more or 

 less strictly confined by the limits of the upper austral zone. A 

 problematical occurrence has been reported to me from Middle- 

 bury, Vermont, some ninety miles to the northeast of the Hudson 

 River loop, and this locality needs investigation. 



Judging from what we know of the distribution of the sugar 

 cane and corn-stalk borer {Diatrcza saccharalis}, it is a tropical 

 or sub-tropical species which extends with ease through the austro- 

 riparian zone. Following up the Atlantic coast extension of the 

 austro-riparian, it occurs abundantly through Georgia, South 

 Carolina, North Carolina, and southern Virginia, and no com 

 plaints of its damage have been received from the corn-growing 

 upper austral belt which bounds on the east the downward ex 

 tension of the Alleghanian. However, that it also possesses the 

 power of reproducing itself to some extent in the upper austral 

 is shown by the fact that it has extended north of the northern 

 limit of the lower austral in Virginia by some 75 or 100 miles, 

 and has also established itself on the north bank of the Poto 

 mac river in southern Maryland. It is not likely, however, that 

 the species will establish itself injuriously to any serious degree 

 in upper austral regions, although one of its prominent food- 

 plants is most extensively grown all through this zone. 



The chinch-bug {Blissus leucopterus) , while a very wide 

 spread species, occurring from North Dakota on the northwest 

 to southern Florida on the southeast, and from northern Maine 

 on the northeast to southern Texas on the southwest, occurring 

 also, sparingly, on the Pacific coast from north California down 

 into lower California, reaches its climax as a destructive species 

 only in the upper austral zone. The band of upper austral on 

 the east side of the Alleghanian, from northern Virginia to the 

 borders of South Carolina, is a portion of this territory ; but 

 from eastern Ohio westward through Kansas, limited on the 

 north by the transition and on the south by the austro-riparian, is 

 its proper home as an injurious species. Curiously enough, Mr. 

 Schwarz has recently concluded that this species is originally a 

 sea-coast form. 



The permanent breeding grounds of the Rocky Mountain lo 

 cust are in the transition downshoot from British Columbia into 

 the northwestern States. 



So far as our information goes, the wheat straw- worm, Isosoma 

 tritici, is confined to the upper austral and makes the proper 

 bend around the lower end of the Alleghanian to the south, in 

 northeast Alabama and northwest Georgia. It occurs in the 



