364 The American Naturalist. [Apr ) 
impetuous vigor of the noon-day outburst. In the warm nights during 
the first part of August; 1887, it was no uncommon occurrence for this 
insect to give a short z-ing. Up to 8 p. m., they often sing, and I have 
heard a Cicada and a katy-did in adjoining trees. On Aug. 17, 1888, 
long after the sun was down, they kept up their songs, each one desir- 
ing apparently, to be the last singer, for their voices are raised in envy 
and the males have no love for one another. They often sing while 
flying about a tree in wavy lines, and once I detected another Cicada 
fly out of a tree and join the singer. It was no doubt a female. 
- They continue musical as late as the end of September, occasionally 
in considerable numbers I have heard them as late as October 3rd, 
both in 1885 and 1886. In the first mentioned year, they were exceed- 
ingly plentiful. When singing loudly the abdomen vibrates quite fast, 
but gradually lessens as the song subsides. 
The dry pupa shells of this insect may be found attached to the bark 
of a variety of isolated trees, upon the roots of which the larve have 
apparently fed. On the 26th of July, 1889, at eighteen minutes to 5 
p. m., I saw a harvest fly come from its pupa case. The legs (tarsi 
excepted) the prothorax and folded wings, were of a grass green color, 
the wings being particularly bright. The eyes were also green, the 
ocelli golden and the mesothorax and abdomen of a brassy appet® 
ance. In twenty minutes the wings were of full size, but flimsy, bend- 
ing with the breeze. The wings were held out flat, on the same plane 
with the dorsal surface, when drying, and the genitalia are protruded. 
The third and largest species of Cicada that has been found on the 
Island is C. marginata Say. The wings of a specimen, spread in the 
usual way, expand nearly five inches. This insect has also been taken 
at Yaphank, on Long Island, by Mr. A.C. Weeks; and Mr. Wm. H. 
Ashmead, who kindly examined my Cicadas, says that the insect 0- 
curs in Pennsylvania and about Washington. On our Island but onè 
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specimen has been found. It was discovered on a small past oak on 
sand dune, near Mariners’ Harbor, on July 19, 1892, while Mr. ae 
tenmuller and I were looking for galls. It was late in the afternoo 
and the insect had evidently but a short time before emerged from 
pupa-case, which we found at the base of the tree. In the sam der 
mer a second pupa-shell was found on a black-jack oak, grow!Pe in ory 
sandy ground at Watchogue. 
The only other harvest fly that has been collected on t 
the red eyed periodical Cicada, or “Seventeen year Locust, 
-a more detailed account, in connection with this locality, W! 
at some future meeting. 7 
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he Islandis 
Il be give 
