on the Upper Amazons. 5731 



place, examining all the trees and their branches, ripping up the bark, 

 and so forth ; then I skirted the edge of it, for one half its circuit, to 

 where the ground sloped down to a brook, but was unsuccessful : the 

 only Coleoptera I found was a Clytus Wallacei, A. White, a small 

 Leiopus, and a new species of Helopidae. One day I determined to 

 fish for water-beetles, and tried some insignificant pools of muddy 

 water in the forest ; I acquired in this way two or three species of a 

 pretty genus, having the facies of the European Hydaticus, but smaller 

 than the English species ; I got also two or three curious species resem- 

 bling Hydroporus, and a Tropisternus, in abundance. Of all aquatic 

 Coleoptera in this country, species of Tropisternus and Berosus only 

 are abundant : at certain seasons they fly to the lamp at night in great 

 numbers. On the bordering edge of the forest several species of 

 Nymphalidae were always to be seen, some of which do not frequent 

 the edge of the water ; such were the Epicaliae, Paphiae, Siderones, 

 Eresiae, Protogonius, Eueides, Hypna, Victorinae, Stheneles, Thyridia 

 Psidii, with several Callidryades, Terias, Colaenis and Agraulis, all 

 common species. On the banks of the river I captured two very rare 

 species of Pieris, one of which is the P. Lorena of Hewitson. 



Such is a sketch of what I observed at this place. The summary 

 of my captures in insects during the twenty days was 607 specimens, 

 about 300 species, of which 20 were new diurnal Lepidoptera and 66 

 new Coleoptera. I acquired also a few new things in other orders, 

 the most interesting of which was a quite new species of Thore, Ha- 

 gen, a genus of Calopterygidae, in the Neuroptera. 1 carried my gun 

 with me only two days, shooting only two birds new to me, one a 

 small parrot, and one a chatterer, 1 think common, the Coracina 

 rubricollis. One day an Indian hunter brought me a pair of a very 

 handsome little monkey, a Midas, new to me : 1 had previously 

 known five species of the genus. 



I left Tunantins with less regret, finding Coleoptera so scarce ; but, 

 as I intended to spend six or seven weeks at Fonte Boa, I hoped to 

 succeed better. We left in an excellent little schooner of about 

 eighty tons burthen, dropping down gently with the current, sometimes 

 stopping for a short time to receive small portions of cargo. At a 

 sandy beech, which was now rapidly becoming submerged as the river 

 was rising, I searched for Megacephalae, but found nothing except 

 M. curta, and the other rather smaller species closely resembling it. 

 At 30 a.m. on the 3rd of December we entered the mouth of the river 

 Jntahi, which is nearly concealed from view, from the main river, by 

 two or three small islands. We had to stay here several days, so 



