46 THE PERIODICAL CICADA. 
recently acquired knowledge of the existence of another periodical 
species in the northwestern United States threw some doubt on this 
reference, and an examination of collected material from that region 
indicates that the species referred to is Tibicen cruentifera Uhl., 
which apparently is also periodic and has other habits closely 
resem})ling septendecim . 
The records of distribution given below are as published in Bulletin 
IS of this Bureau, with the exception of West Virginia, where a good 
many counties have been added from Doctor Hopkins's Bulletin 68 
and from later records secured b}^ him. The starred counties indi- 
cate the occurrence of the Cicada in one or more characteristic dense 
swarms; the italicized counties are confirmations of old records, and 
the counties inclosed in parentheses are old records not reported in 
1898. The distribution, by States and counties, follows: 
Delaware. — Xewcastlo. 
District of Columbia. — Several localities. 
Georcia. — Dade,* Elbert, Floyd, Habersham,* Hall,* Paulding, Rabun,* Spalding, 
A\Tiite. 
Illinois. — Dewitt,* Douglas, Knox, McLean, Montgomerj^ Scott, Shelby,* Ver- 
milion. 
Indiana. — Boone, Brown, CaiToll, Grant, Johnson, Laporte, Wells. 
Kentucky. — Letcher.* 
Maryland. — Carroll, Cecil, ^Montgomery, Prince George, Washington. 
Michigan. — Barry, (Cass?), Chippewa, Genesee,* Houghton,* Kent(?), Macomb(?). 
Newaygo(?), Ogemaw(?), Otsego,* Shiawassee,* Washtenaw. 
New Jersey. — Bergen, Cumljerland, Essex, Hudson, Hunterdon, Mercer, Middlesex, 
Morris, Passaic, Somerset, Union. 
New York. — Greene, New York, Richmond, Schenectady, (Westchester). 
North Carolina. — Alexander,* Bladen, Buncombe, Burke,* Cabarrus, Caldwell,* 
Catawba,* Henderson,* Iredell, Lincoln,* McDowell,* Macon,* Montgomery, 
Moore, Pender,* Polk,* Randolph(?), Rutherford, Swain,* Transylvania,* 
Union,* Washington (?), Wilkes.* 
Ohio. — (Ashtabula), Carroll, Champaign, Columbiana, Delaware, Madison, Mahoning, 
-Montgomery, Morrow, Pickaway, Shelby, (Summit?), L^nion, (Vinton?). 
Pennsylvania. — Bucks, (Dauphin), (Lancaster), Montgomery, (Northampton and 
adjoining counties), (Philadelphia), Westmoreland. 
South Carolina. — Oconee.* 
Tennessee. — Bradley, Greene, Hamilton, Jefferson, Knox, Meigs, Polk, Sullivan. 
Virginia. — Charlotte, Chesterfield, Fairfax, Powhatan, Prince Edward, (Smyth*. 
\\'est Virginia. — Berkeley, Brooke, Clay, Fayette, Grant, Hampshire, Hancock, 
Hardy, Jeffei-son, Marshall, Mineral, Monongalia, Monroe, Morgan, Ohio, Pendle- 
ton, Pocahontas, Preston, Raleigh, Tucker, Tyler, Webster. 
Wisconsin. — Burnett,* Columbia, Crawford, Dane,* Fond du Lac, Green Lake,* (La 
Crosse), Marquette,* Sauk,* Sawyer, Washburn, Waushara.* 
Brood YU—Septe)ulecim—191Q. (Fig. 10.) 
This brood was founded b}^ Professor Riley in 1869 on Doctor 
vSmith's recjister, in which it is recorded from 1797 to 1848 as occurring 
in certain counties in western New York. As indicated elsew^here, 
