SB 

 818 

 C578 

 ENT 



» No. 89. 



Issued May 14. 100? 



iiited States Department of Agriculture, 



BUREAU OF ENTOMOLOGY, 

 L. O. HOWARD, Entomologist and Chief of Bureau. 



THE PERIODICAL CICADA IN 1907. 



• {Tihicen scptcndecim L., race tredecivi Walsh-Riley.) 



J5y C. L. Marl ATT, 



Entomologist and Acting Chief in Absence of Chief. 



This is a, circular of inquiry concerning the brood of the periodical 

 cicada or ' ' locust " ( fig. 1 ) which will occur in Ma}^ and June of this year 

 throughout the Southern States east of Texas, except Florida, northward 

 in the Mississippi and Ohio valleys through Missouri to southeastern 

 Iowa, arid over most of 

 central and southern 

 Illinois and extreme 

 sou-thwestern Indiana. 

 This brood covers also 

 western Kentucky and 

 more or less of Tennes- 

 see, with extensions 

 northeastward across 

 the Carolinas into Vir- 

 ginia. A doubtful record 

 is known from the Rio 

 Grande in the region of 

 El Paso, Tex., but no 

 other records have been 

 obtained for this State, and the El Paso record is therefore open to some 

 question. 



The Bureau of Entomology wishes to obtain a complete record of 

 the distrilnition of this important l)rood this year, and therefore a reply 

 card is sent with this circular, on wliich the information relating to its 

 occurrence in each district maj' be indicated. It is hoped that every 

 recipient of this circular and reply card will keep the matter in mind, 

 fill out the card as indicated, and return it to this ofhce. .4 negative 

 record is often quite as valKdhle as one of actual occurrence. The card 

 should be filled out with the name of the locality, including the State, 

 county, and town, the name of the observer, and the date. Space is 

 left at the bottom of the card for a note on any features of interest, and 

 th<; information given should include tlic date of lirst appearance or 

 emergence of the cicada, the date of its general disajjpearance, and the 



Fk;. I.— The pei'iociifal piead^ (Tihi-ri) sci>ti->:di'cim): a. 

 adult: b, same, side view; <•, siiod pupal skin. Natu- 

 ral size (author's illu.stratiou). 



