DR. GIDEON B. SMITH’S CHRONOLOGY. LS 
[Nore on THE SmirH ReGisteR.—An examination of the above register of appear- 
ances, prepared by Dr. Gideon B. Smith, at once indicates the painstaking care which 
Doctor Smith must have devoted to the subject, and surprises one with the accuracy 
and completeness of the records. All of the important broods known until recently 
are designated more or less completely in Doctor Smith’s register, namely, the seven 
13-year broods and the fourteen 17-year broods mentioned in Bulletin 14. 
Taking the records in the order in which they are given in Doctor 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 XIX, after 1843 to Brood XX, and similarly 1844 to Brood X XI, 
1845 to Brood XXII, 1846 and 1859 to Brood XXIII, 1849 to Brood XX VI, and 1854 
to Brood XVIII. 
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 I, after 1843 to Brood II, and 
similarly 1844 to Brood III, 1845 to Brood IV, 1846 to Brood V, 1847 to Brood VI, 1848 
to Brood VII, 1849 to Brood VIII, 1850 to Brood IX, 1851 to Brood X, 1852 to Brood 
XI, 1854 to Brood XIII, and 1855 to Brood XIV. The records given after 1853 are 
probably erroneous, as indicated in the discussion of my Brood XII (pp. 55-56).— 
¢.L. M.] 
