smith's chronology. 
14. 
accuracy and completeness of the records. All of the broods as now known are 
designated more or less completely in Dr. Smith's register, namely, the seven 13-year 
broods and the fourteen 17-year broods. 
Taking the records in the order in which they are given in Dr. Smith's register, 
and beginning with the 13-year race, it will be seen that the localities listed after 
1842 and 1855 refer to Brood XVIH, after 1843 to Brood II, and similarly 1*11 to 
Brood IV, 1845 to Brood VI, 1846 and 1859 to Brood VII, 1819 to Brood X, and 1x51 
to Brood XVI. 
Comparing in the same way his register of the northern tribe, or 17-year race, it is 
seen that his localities listed after 1842 apply to Brood XI, after 1813 to Brood XII, 
and similarly 1844 to Brood XIII, 1845 to Brood XIV, 1816 to Brood XV, 1*17 to Brood 
XVII, 1848 to Brood XIX, 1849 to Brood XX, 1850 to Brood XXI, 1851 to Brood XXII, 
1852 to Brood I, 1854 to Brood V, and 1855 to Brood VIII. The records given after 
1853 do not fall into the chronology of the known 17-year broods, and are either 
erroneous or of a brood the existence of which has not been continued by subsequent 
records. — C. L. M.] 
