48 NEW YORK STATE MUSEUM 



in the Yukon territory and states that he has two specimens of the 

 dark form taken in Labrador in 1894. The adults are quite active 

 and owing to their being abroad so early in the season may have 

 been frequently overlooked by collectors. A close ally, B r e p h o s 

 i n f a n s Moschler, occurs in early spring in the vicinity of Albany 

 and is quite different from this circumpolar species, it being larger, 

 with reddish brown tints, and on its hind wings a deep orange 

 colored area, the latter curiously margained in the anal region by 

 a triangular, dark brown area and with a small, oval, dark brown 

 area near the discal cell. 



Periodical cicada (Tibicen septendecim Linn.) . The 

 occurrence of the periodical cicada is of exceptional interest on 

 account of the prolonged interval occurring between broods. The 

 conditions on Staten Island appear to be unusually interesting. 

 There was, it will be remembered, a large brood on Long Island in 

 1906 and one pupa was discovered on Staten Island by Mr William 

 T. Davis and in June he heard an insect call at Richmond valley. 

 This species was evidently numerous on Staten Island in 1907. This 

 brood appears to have escaped notice prior to 1890, at which time 

 Mr Davis found three pupal skins at New Brighton and an adult 

 was seen by his sister on a tree trunk. A specimen was also 

 observed by Mr Leng near the Moravian cemetery. The following 

 observations upon the occurrence of this insect in 1907 are tran- 

 scribed from Mr Davis's notes : 



From the records of 1890 it was to be supposed that some 

 evidence of the small and scattered brood of the periodical cicada, 

 now known as no. 15, would be found in 1907 on the island, and 

 in the neighboring parts of New Jersey. On March 31st Mr 

 Alanson Skinner gave me a pupa that he had found under a stone 

 at Woodrow. On June 226. I heard several 17-year cicadas singing 

 in the trees at Woodrow and vicinity, and found two pupa skins 

 on an apple tree on the farm of Mr Isaac Wort. Mr Wort had 

 also heard the cicadas at various times, and he presented me with 

 a pupa that he had found some time before my visit. The fol- 

 lowing day a cicada was heard at Watchogue at the other end 

 of the island. Later in the summer^ while with Mr Henry Bird 

 in the Close valley, we each found a pupa skin of the 17-year 

 cicada. Mr Charles P. Benedict informs me that he found in 

 June several pupa skins as well as fully developed cicadas at his 

 home on the Manor Road, West New Brighton. 



In New Jersey the 17-year cicada occurred at Westfield, Plain- 

 field and Newfoundland. 



It will be seen from the foregoing that the individuals were 

 quite numerous and no doubt sufficiently so to insure the insect's 

 appearance in 1924. 



