Natural-History Collectors. 



6167 



me, whilst the commonest Ega species were no longer to be met 

 with. On the sandy margins of the brooks in the forest, there were 

 three or four very prelly species of Lachnophorus, also new, and two 

 Mgdd. Besides these, I found only one Lebia, two or three Ozaenae, 

 two Cymindes, some Selenophori and Scarites new to me. The 

 Ozaenae are very interesting insects on account of their supposed 

 relation to the Paussidse. 1 have now about a dozen species ; the 

 largest of all, about one inch long, I took at St. Paulo, within my own 

 house at night, long after the windows and doors were closed. 1 think 

 it very likely to be the very rare O. dentipes of Olivier. It flew towards 

 the light, and settled on the wall. On seizing it it crepitated fully as 

 strongly as the large yellow and black Brachini of the country (B. 

 complanatus ?). Two other species I captured flying in the evening 

 on the edge of the high banks of the river. One large species I found 

 at the roots of a tree amongst the earth. I generally find them 

 beneath loose bark of felled trees. With regard to the crepitating 

 faculty, I find it is more generally possessed by the Carabides of the 

 division Truncatipennes than has been hitherto supposed. I have 

 observed it repeatedly and distinctly in species of Cymindis, Agra, 

 Calleida, Cryptobatis, Coptodera, and several other genera. 



In the Dytiscidae I obtained very few things — one Hydaticus, one 

 Copelatus and one Hydroporus — the pools of water were chiefly 

 tenanted by three small species of the curious genus Hydrocanthus, 

 in company with a Laccophilus. The Hydrocanthi merit close atten- 

 tion on account of the peculiar structure of their metasternum, the 

 place of which can scarcely be considered as occupied by the 

 posterior haunches, because it forms an elevated plate of very curious 

 structure, beneath which move the posterior legs. In Staphylini 1 

 took several handsome species new to me, one a Scytalinus more than 

 an inch long, flying abroad in the evening. In the same way I cap- 

 tured the largest Pselaphide perhaps as yet known, it is a Metopias. 

 In Lamellicornes the locality proved still poorer than Ega. This is a 

 group which requires a long stay in a locality to meet with the larger 

 species of: I found very few in the scanty flowers which blossomed 

 now and then along the borders of the forest ; several, though small, 

 were new and interesting, especially a striped Isonychus and two 

 Macraspes. Within the forest I met with a third species of a small 

 brilliantly metallic genus allied to Chalcentis, and four specimens of 

 a strikingly handsome genuine Rutela, of a most brilliant orange- 

 colour, with two vitta3 on prothorax and other marks black. I met 



