Twelfth Report of the State Entomologist 277 



It will here be opportune to refer to the attempt by Dr. Riley to deter- 

 mine by experiment, whether these two broods were really distinct species 

 or only races. In 1885, eggs of the thirteen-year brood were sent to 

 several places in the Northern States, and similar transfers of the eggs of 

 the seventeen-year brood were made to the Southern States. The object 

 of the transfer was to test the question whether the change from a warm 

 latitude to a colder, and vice versa, would have any marked effect in 

 retarding or hastening the life-period of the insect. Two lots of eggs of 

 the thirteen-year brood were received by me in July from Dr. Riley and 

 were placed in the apple orchard of Mr. Erastus Corninir, at Kenwood, 

 near Albany. The tree under which they were placed bears the follow- 

 ing inscription on a zinc label: 



'' Thirteen -ye a7' brood of Cicada ( Riley's Brood, No. VII) — eggs from 

 Oxford, Mississippi, planted July 4, 1885." 



Additional eggs, together with the larvae that had hatched while in 

 transit, were placed under the same tree July 21. If any of the insects 

 have lived and remain true to their period, their appearance may be 

 expected in May or June, 1898. Should thty fail to appear at that time, 

 search will be made for them, if need be, for tw^o or three successive years, 

 and the results reported to the Entomological Division of the Depart- 

 ment of Agriculture at Washington. Eggs of this same brood were also 

 sent by Dr. Biley, to Ithaca, N. Y.; Boston, Mass.; Kittery Point and 

 Brunswick, Me., and Ames, Iowa. 



Distribution of the Hudson River Valley Brood. 



Dr. Fitch, in 1856, gives as the limits of this brood, the valley of the 

 Hudson liver, from the vicinity of Schu) lerville and Fort Miller* on the 

 north, southward along both sides of the Hudson to its mouth, where 

 it extends northeastwardly, at least to New Haven in Connecticut, and 

 southward across the northern j): rt of New Jersey and into Pennsylvania. 

 Later observations enabled Dr. Riley to extend the limits of this brood, — 

 including the greater pari of the State of New Jersey most ])robabIy; 

 localities in Faii fax, Albemarle, Campbell, and Fulvanna counties, Vir- 

 ginia; Charles county, Maryland, and the District of Columbia. 



Observations and reports upon the occurrence of this brood in 1894 

 enable us to give the following as its distribuiion so far as known: 



In New York the brood was reported from the Rural cemetery 

 four miles north of Albau}-, and thence southward in localities 

 on both sides of the Hudson river to New York City; at New Brighton, 



* Forty-seven miles north of Albany. 



