28 



THE AMERICAN ENTOMOLOGIST. 



doubtless the Cicadas appeared ; these 

 added to the reported counties make the 

 whole number thirty-three or thirty-four, 

 or, say one third of the State. A careful 

 calculation shows this area to include from 

 18,000 to 20,000 square miles. Its north- 

 ern, or more properly, its northeasterly mar- 

 gin is parallel with the Des Moines river, 

 and distant from it about fifty miles, run- 

 MT ning from near the city of Muscatine to 

 ■5^ Hamilton Co. when it bends off southwest- 

 wardly to Cass Co. and thence to the State 

 line in Decatur County. That part of the 

 area lying southward, or southwestward of 

 the Des Moines river is considerably broad- 

 er than that on the northeast, being from 

 sixty to seventy miles in width. 



List OF COUNTIES, WITH EXTRACTS 

 FROM CORRESPONDENCE. 



Van Buren. (i) Yes. (2) They are not 

 doingvery much damage. (3) In 1861. 



Davis. Information that they were in this 

 county this year is derived from a news- 

 paper account. 



Wayne. Abundant. 



Decatur, (x) Abundant. (3) In 1861. 



Des Moines. Rather abundant, but not 

 to be compared with what they were 

 • in 1861. 



Henry. They are not abundant ; not 

 nearly so many as when here in i86r. 



Fairfield. They are not considered abun- 

 dant this year. Hon. C. W. Slagle 

 made a memorandum in June 1844 

 " Our groves are alive with an innu- 

 merable multitude of Locusts. I note 

 this Locust Year." And again in June 

 19, 1 86 1 "The Locusts are very nu- 

 merous at present." 



Wapello. Not abundant here, compared 

 with the amount we had in 1861, when 

 they did some damage to fruit trees 

 and timber. 



Monroe. Very abundant in 1861 ; fewer 

 this year. 



Union, (i) They are here, but not in 

 numbers sufficient to create any alarm. 

 (3) In 1861. 



Louisa, (i) They are in our county this 

 year, but are not abundant. (2) Do- 

 ing little damage. (3) As near as I 

 can learn they were here in 1861 and 

 again about seven years ago [187 1]. 



This is interesting, as indicating an 

 overlapping of the two broods (/. e. of 

 1871 and 1878) which occur in the 

 State. [C. E. B.] 



Keokuk, (i) They seem to be abundant 

 in the timber and adjacent thereto. 

 (3) 1861. 



Mahoska. (i) Quite abundant. (2) Not 

 doing any damage. (3) 1861. 



Marion, (i) Quite abundant in the groves 

 of native timber. (2) Not doing as 

 much damage as I have known them 

 to do heretofore. (3) 1844 and 1861. 



Warren, (i) Quite abundant here, es- 

 pecially in the woods. (3) They were 

 here in 1861, and were much more nu- 

 merous than now. 



Madison, (i) They are in this county in 

 considerable numbers, but not so as to 

 be called abundant. (3) Old settlers 

 say they were here in 1861. 



Adair, (i) They are very few in number. 

 (3) They were very plentiful when 

 here in 1861. 



Cass. One informant in the eastern part 

 of this county says " They are here 

 though in small numbers": while an- 

 other in the western part reports " none 

 at all this year." 



Iowa, (i) We have them, but not abund- 

 antly. (3) We had them in 187 1 in 

 great abundance. 



3^==" This report, like that from Louisa 

 Co., indicates an overlapping of broods. 

 Another correspondent from the same 

 part of the county reports no Cicadas 

 this year, but refers to the brood of 

 1871. [C. E. B.] 



PowESHiCK. (i) They are here in abund- 

 ance. (3) Numerous in 1861. Some 

 years ago [1871] there were a great 

 many, but not a tenth part as many as 

 this year. 



Jasper, (i) Quite numerous. (3) In 1861, 

 according to old settlers. 



Polk. Not near as abundant as at their 

 last visit in 1861. 



Dallas, (i) Not abundant. (3) I have 

 lived here twenty-five years, and do 

 not remember ever seeing them here 

 before. 



Marshall, (i) They are abundant in 

 parts of this county. When they first 

 made their appearance, two weeks ago, 

 they were only where there were natu- 

 ral groves of timber. Within a few 

 days they are spreading out on the 

 prairies to where there are planted 

 groves and orchards. (3) In 1861. 



Story, (i) Abundant in certain parts of 

 the woodlands. In one extensive piece 

 of low woodland, none at all were ob- 

 served. As there had been a great 

 freshet a little while before the time 

 for their appearance above ground, 



