44 
THE PERIODICAL CICADA. 
dense swarms, but scatteringly, at least in its more northern range. No 
records of its appearance which have come to our notice were made in 
1883 nor in 1896. 
The distribution, by States and counties, is as follows : 
Alabama. — Lauderdale, Mobile. 
Florida. — Gadsden, Jackson, Washington. 
Mississippi. — Jackson, Tishomingo. 
Tennessee.— Savannah. 
Brood XL — Septendecim — 1910. (Fig. 15.) 
This is a well-authenticated brood, representing widely separated 
localities, and was established originally on data given by Dr. Smith. 
Map showing distribution of Broods VI and XI, 1910. 
The following summary of its distribution is substantially as given by 
Professor Riley in the Report of the Department of Agriculture for 
1893, pp. 204-205, and includes the old records, together with the 
confirmations and additions coming from the careful investigation made 
by Professor Riley in 1893, the year of its last appearance 
The doubtful records prior to 1893 were those relating to the occur- 
rence of this brood in Kansas and Colorado. The localities in Kansas 
received doubtful confirmation in 1893, and the Colorado localities 
remained unverified, although the district mentioned was visited and 
special search was made for evidences of the insect. 
