Description and name. — While engao-ed in the study 

 of the life-history and habits of this insect at headquarters in 

 Carcarana, certain greenish saltonas were obtained that 

 were without the characteristic black markings of the saltona 

 of paranerms. Some of these were fed to maturity and de- 

 veloped into the closely allied Schistocerca cancellata Serv. 

 which is normally a Chilean insect, but which also occurs on 

 the east slope of the Andes and even in the interior to Para, 

 Brazil. By referring to the illustrations numbered 1 and 2 

 the reader can see the differences betwen the two inscets. 

 This difference is especially discernible in the saltonas. 



Fig. 2. — Scliistocerca can ellata: mature female, saltoua, and top of head 

 and pronotum [original]. 



Distribution. — The accumulation of data for the past 

 two additional years does not materially change the pub- 

 lished distribution of this Argentine locust. The maps, 

 marked figures 3 and 4 show graphically the areas occupied 

 during the winters of 1896, 1897 and 1898, and the warmer 

 seasons of 1896-97, 1897-98 and 1898-99. 



Mangas of large destructive locusts have been mentioned 

 by different writers as occurring in Northern Ecuador, in 

 portions of Brazil, Chili, Bolivia, etc. Perhaps these are 

 distinct from jiaraneii-sis in some instances at least, and cannot, 



