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It is very desirable to have the records for this brood confirmed with 
its occurrence this year, and accompanying this circular, therefore, a 
reply card is sent on which any information relating to this brood may 
be recorded as indicated on the card. A negative record is often quite 
as valuable as one of actual occurrence. Inasmuch as the periodical 
cicada does not appear, as a rule, until about the last week of May, it 
is well not to fill out the cards or return 
them before the middle of June. Later 
than the middle of June there is danger 
of confusion with the annual species of 
cicada, which will then begin to appear. 
THIRTEEN-YEAR BROOD XVIII. 
A very seattering brood of the thir- 
teen-year race of the periodical cicada 
appears this year in conjunction with 
the much larger and more widely dis- 
tributed seventeen-year brood. This 
thirteen-year brood is based on the tes- 
timony of Dr. G. B. Smith, who gives 
a record of its occurrence in Cherokee 
County, Ga., in 1828, 1841, and 1854. 
Dr. J. G. Morris recorded its appear- 
ance in the same locality also in 1867. 
This is Doctor Riley’s Brood XVI, and 
some additional records were added by 
him, so that it is now known in four 
States. occurring, however, in scattered 
localities. The localities for this brood 
as listed by Doctor Riley are given be- 
low. None of them were verified in 1893, 
but an additional and very doubtful 
Fig. 3.—Egg punctures of the periodical locality — Montgomery County, NG) — 
cicada: a, twig showing recent punec- 
tures, from front and side, and illustra- 
ting manner of breaking; b, twig show- It is very desirable to have confir- 
o Le Y “eS y "“etract ° 2 ey.s . 
ae es ae Pipa et et te mation of all the localities mentioned 
rangement of fibers. Naturalsize (after for this brood, and persons recelving 
Riley). 
was reported. 
this circular throughout the region rep- 
resented will confer a great favor by reporting any occurrences which 
may come to their notice. Any periodical cicadas appearing in the 
higher elevations in the mountain regions of the States referred to will 
probably be of the seventeen-year race, but emergences at low levels 
