— 9 — 



15. Anlsops elegans Fieb. 



Cuenca; Gualaquiza , Pun ; Quito; Tumaco; Valle Santiago. 



16. Martarega (1) membranacea F. B. W. White. 

 cf£ Gualaquiza. 



In the first part of my « Revision of the Notonectidae » (Trans. Ent. 

 Soc. Lond. 1897) I gave an analytical table of the Notonectinae (p. 395), 

 which the examination of Martarega proves incorrect. 



As the second part of my « Re vision » may not be published for some 

 while yet, I take this opportuni ty of giving a revised table. 



1. Eyes not contiguous at the base (2); posterior femora not reaching 

 to the apex of the elytra, the latter divided into areas. 2 



— Eyes contiguous at the base ; pronotum very transverse; elytra noi 

 (or indistinctly) divided into areas. 4 



2. Pronotum not transverse, a large rounded fovea not present near 

 each antero-lateral angle 3 



— Pronotum very transverse, a large rounded fovea near each antero- 

 lateral angle; ultimate and penultimate segments of antennae subequal ; 

 anterior tarsi 2 -segmentate cTj, posterior tarsi with long claws. 



Enithares Spin. 



3. Comparatively fiat and broad ; ultimate segment of antennae much 

 shorter than penultimate; anterior tarsi bisegmentate d"$ ; posterior tarsi 

 without claws. Notonecta Linn. 



— Very convex dorsally, and slender ; ultimate segment of antennae 

 much longer than penultimate; posterior tarsi with claws, anterior tarsi 

 1 -segmentate e? , 2-segm. $>. Anìsops Spin. 



4. Posterior femora reaching beyond apex of elytra; ultimate segment 

 of antennae much longer than penultimate; intermediate tarsi bisegmen- 

 tate cf$. Nychia Staol 1859 = {Antipalocoris Scottj. 



— Posterior femora not reaching tho apex of elytra; ultimate segment 

 of antennae much shorter than penultimate; intermediate tarsi I-seg- 

 mentate cf, 2-segm. 9. Martarega F. B. White [= Signoretìella Berg.]. 



(1) Martarega F. B. White 1879 = Signoretìella Berg 1883. 



(2) In some species of Anìsops, the eyes in the tf are almost contiguous at 

 the base, rarely actually touching; in Martarega and Nychia, the iuner mar- 

 gins of the eyes are contiguous for at least one — tliird of their dorsal length 

 from the base. 



