TLATK IV. 



'1"aI!. Xlll. H;u'k-s\viniiiUM s : adults: and nymphs. 



T\u XV. Nopa. 



'Pais. X\1. Ivanatra. 



Tam. XI\'. Naiuurid. 'Vhv aliovi- are pliolo.uiaplis of tlir platos in 

 l-'iisi'h, an old text publislu-d in 1727. Amon<i- the lii-st pul)lisht'd illus- 

 trations of water Ini.us. (Not (he lirst, however.) 



i'liol'o. 1. The toad lui.u' resting' upon sand. 



IMiOTi). '2. N'ential view of female Corixid. Note the i)eeuliai' beak 

 and lemaikalile dilViTent iat ion of the limbs. 



i'liom, 15. .\otoiu'clti H lulaliitti. Say. 



IMioTo 1. Hiu'iioii i>i(tr(/(i)(litc((t. lUieno. 



IMloTD. f). l'\'n;a'e Corixid h'a m plioroiixa (triiDiiinitd. Uhl. 



(274) 



