OF WASHINGTON. 159 



Professor Uhler was then called upon to address the Society. 

 In responding he gave the results of his observations upon the 

 Periodical Cicada in the vicinity of Baltimore, especially during 

 the past season. The cicadas, he said, were first observed on the 

 27th of May. in Baltimore, in the neighborhood of Druid Hill 

 Park. From that time on they appeared in increasing numbers 

 until the iSth or 2Oth of June, at which time they were extremely 

 abundant In fact, he was informed by one whom he regarded 

 as a reliable authority that 39 cart-loads of these insects were 

 carried away from the park grounds. 



Professor Uhler stated that he had in his possession two speci 

 mens of this cicada collected in 1783. They were given him 

 many years ago by the son of the well-known collector Mr. Wilt, 

 who came to this country in 1782. He also had in his collection, 

 besides the specimens collected during the past season, some 

 examples from the previous appearances of the brood, in 1851 

 and 1868. 



He mentioned the singular fact that he had found this cicada 

 appearing at the same localities every year for five consecutive 

 years after 1885 on the Belair and Harvard roads to the northeast 

 of and within three miles of Baltimore. 



In regard to the form cassinii, Prof. Uhler said that he had 

 collected large series of cicadas ranging in size all the way from 

 the smallest specimens to the largest of typical septendecim. and 

 he had found that the abdominal colors varied. In addition to 

 this the song-notes which were thought to be peculiar to each 

 form were found to be used by both. There no longer, there 

 fore, appeared to him any reason for considering the form cassinii 

 as valid. Cassinii has been reported as appearing somewhat 

 later than typical septendecim, but he had found it throughout 

 the season, both early and late, and he thought it noteworthy 

 that he had found it at Pen Mar, Maryland, as late as the early 

 part of August. 



Speaking of the mounds or turrets, Prof. Uhler said that those 

 he saw differed from Prof. Riley's published figures in that the 

 hole of emergence was never at the side or bottom, but always at 

 the top. The turrets were found only in certain localities and 

 under hemlock and balsam, not under oak trees. 



Mr. Marlatt said that he agreed with Prof. Uhler as to the in- 



