Insecutor Inscitiae Menstruus 



Vol. V. APRIL-JUNE, 1917 Nos. 4-6 



AN ANNOTATED LIST OF THE THYSANOPTERA 

 OF PLUMMER'S ISLAND, MARYLAND 



By J. DOUGLAS HOOD 



Nine miles above the city of Washington, in the Potomac 

 River, is the home of the Washington Biologists' Field Club, 

 a little island of 12 acres known as Winnemana or Plummer's 

 Island. From the lodge, 75 feet above the water, it slopes 

 precipitously on the south to the edge of the Potomac ; on the 

 north and east to a low, forested flood-plain ; while toward the 

 west it is more irregular in contour, with typical upland hard- 

 woods, scattered pines and junipers, and isolated rocky patches 

 overgrown with such plants as Opuntia and poison ivy. 

 Charming and convenient of access, it has become a favorite 

 collecting spot for local entomologists, and in the scientific 

 literature of the last decade there have been recorded from 

 these 12 woodland acres more than 100 new insects, for whose 

 reception have been erected 13 new genera and 2 new families. 



The Thysanoptera, however, received no attention until Jan- 

 uary, 1912, when, through the kindness of Mr. W. L. McAtee, 

 the author made his first visit to the island. Since that date 

 many hundreds of specimens have been taken, until at present 

 57 species are known from the island itself, in addition to 

 several unidentified uniques not here listed. Seventeen addi- 

 tional species have been taken within a few miles of the 

 island — some, indeed, within a few yards. All of the latter 

 probably occur here while several others, at present unknown, 

 doubtless await discovery. 



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