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Upper:Waterfall at Juan Viñas, Costa Rica. Lower: The Larvae of damselfly Thaumatoneura, 1. female, 2. and 3. male

Identifier: yearofcostarican00calv (find matches)
Title: A year of Costa Rican natural history
Year: 1917 (1910s)
Authors: Calvert, Amelia Smith, b. 1876 Calvert, Philip Powell, b. 1871 joint author
Subjects: Natural history -- Costa Rica Costa Rica -- Description and travel
Publisher: New York, The Macmillan company
Contributing Library: Brown University Library
Digitizing Sponsor: Brown University

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The Farther Waterfall at Juan Viuas. To J ace p. iq2
Text Appearing After Image:
The Nearer Waterfall at Juan Viuas.The Larvae of Dragonfly, Thaiimatoneura. i, female, X2. 2 and 3, male, xi.8. To face />. igs JUAN FIN AS—THE WATERFALLS 193 overhanging vegetation. The fluctuations in volume ofthis fall were very slight. It was in or at the foot of one or other of these two water-falls that we found the transforming larvae of certain dragon-iiies,— Thaumatoneura, Argia talamanca, Philogenia carril-lica and Palcemnema—of whose habits and early stagesnothing had been known previously. From our observa-tions here and elsewhere in Costa Rica it appears that Thau-matoneura and this Argia are exclusively waterfall-dwellers,but that Philogenia and Palcsmnema live in other situationsalso. Standing at the bottom of the nearer waterfall on June 24,and looking up, I could see the males of two supposed speciesof Thaumatoneura fluttering through the spray, chasing eachother or alighting upon the rocks or plants. One species(inopiyiata) had a blackish-brown band across t

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30 July 2014

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