1909.] PUBLIC DOCUMENT — No. 31. 207 



tliougli close watch was kept. From this it would sccni that the 

 brood had died out in Massachusetts, but careful watch should 

 be kept at the next occurrence, in 1020. 



1851. (Riley, XXII.) Brood X. 



BUISTOL. I'JIU. 



Occurrence. 

 Rutland, Vt., 1851, 1868; Bristol County, Mass., 1834. 



This is the hirgest brood of the seventeen-year broods, and 

 equals, if not exceeds, in extent the largest thirteen-year brood, 

 — brood IX. Its representation in Massachusetts, however, is, 

 if authentic and still active, — which is very doubtful, — small 

 and of no importance. The brood has been well recorded in the 

 east from 1715 to 1902, the date of its last appearance. It 

 occurs from Alabama and Wisconsin to ]\lassachusetts, in greater 

 or less numbers, and in 1851 and 1808 appeared at Rutland, 

 Vt. According to Dr. Fitch, " What appears to be a detached 

 branch of this brood occurs in the southeastern part of Massa- 

 chusetts." It is probable, however, that there was some mistake 

 about this occurrence. 



1843. (Riley, XII.) Brood II. 

 New York and Connecticut neau Massachusetts State Line. 1911. 



Occurrence. 

 New York: Copake, 1877; Hillsdale (millions), 1894. 

 Connecticut: New Haven, 1724, 1894; Southington, 1894; New 

 Britain, 1894; Farmington, 1894; Winsted, 1894. 



This is one of the best-recorded broods, being distributed 

 from New York and Connecticut to North Carolina, with iso- 

 lated swarms in Indiana and ]\Iichigan. While no colony of 

 this brood has been reported in jMassachusetts, they come so 

 close to the State line on the southwest that stragglers, at least, 

 must have crossed into Massachusetts. At Copake, and espe- 

 cially at Hillsdale, N. Y., in 1894, there were vigorous colonies 

 within 1^/2 miles of our State line, while in Connecticut, at 

 Winsted, they came within 7 miles. Careful inquiry from the 



