THE INSECTS OF NEW JERSEY. 



89 



nursery and other young fruit trees. These slits never heal, and, 

 while on a large tree the injury is a mere trimming as the twigs wilt 

 and break, on the small trees they are a source of permanent weak- 

 ness, and sooner or later the branch or even trunk breaks. 



Fig 34. The Periodical Cicada, Tibicen scptcndecim: a, pupa, ready to 



emerge; b, pupa skin from which adult has emerged; c, adult; 



d, cavities to receive eggs; e, eggs, enlarged. 



The species "rimosa Say" and "striatipes Hald.," listed in the last 

 edition, are probably not of our fauna. 



CICADA Linn. 



C. marginata Say. Staten Island VII (Ds) ; New Brunswick, rare, Lake-- 

 wood common (Sm); DaCosta, Riverton IX, 10 (div). The largest of 

 our species and the longest winged. Not found every year, but no 

 definite intervals have been noted. 



C. sayi Grossb. Throughout the State from mid-July to early October, 

 and the most common of our "Harvest flies." It is the species that 

 has in the past been known as "pruinosa" because of the uniform 

 white powdering of the underside. 



C. pruinosa Say. Cape May IX, 20, Anglesea IX, 8 (Dke) ; Bayside X, 21 

 (Coll). Really a very rare species, of which only a few specimens 

 are known in collections. 



C. linnei Grossb. Throughout the State, common from mid-July until 

 frost. This is the species that used to be called "tibicen Linn." the 

 latter being really a South American form. 



