dytiscid.î: et gyrinid.î: 
19 
lateribus versus basin oblique ampliatus, basi utrinque sub-sinualus, 
angulis anlicis antrorsum prominulis, acutis, posticis retrorsum non- 
nibil productis, sub-acuminatis ; supra convexiusculus, subtiliter, con- 
ferlim punctulatus, flavo-testaceus, nitidus, pone médium vitla trans- 
versa, longiori, utrinque attenuata, nigra, anlerius in medio ramulum 
nÉGlON DE SAI.T MARSH (u. K. A.) 
brevem, apice triangulariter amplialum, concolorem emiltente, margi- 
neque postico nigro. Sculellum nigrum, sub-laeve. Elytra ovala, anlice 
prothoracis basi haud latiora, a basi ad médium modice rolundato- 
ampliala, dcin apicem versus sensim anguslata, apice conjunclim 
rotundata, inlra marginem obsolète et remole punclulata, supra con- 
vexiuscula, nigra, dorso parce, exlrorsum crebre flavo-irrorata, mar- 
gine laterali plagaque magna apicali, communi, antrorsum rotundata, 
Havo-testaceis, illa medio crebre, confuse nigro-irrorala. Corpus 
