S80 THE NATURALIST IN NICARAGUA. [Ck. XXI. 



and countries lying to tlie southward. The preponder- 

 ance of southern forms is not so great as in the birds, 

 but when we reflect on the large number of peculiar 

 species, and that the Longicorns of the Atlantic slope of 

 Costa Rica are yet scarcely known, it appears likely that 

 many of the Chontales species will be found ranging 

 southward across the San Juan river, and that the Insect 

 fauna will be shown to have the same relations as the 

 Bird fauna; for, as the Atlantic forest continues un- 

 broken much further southward than northward, so will 

 the insects peculiar to the forest region have a greater 

 range in that direction. 



Mr. Hollick has beautifully drawn on wood a few of 

 the characteristic Longicorns of Chontales, all of them, 

 with one exception (Polyrhaphis Fubricii), being as yet 

 only known from that province, but probably extending 

 into Costa Rica. 



One of these, the lovely little Cosmisoma Titania, 

 No. 7 in Plate, has been appropriately named after the 

 Queen of the Fairies by Mr. Bates. It was first found 

 by Mr. Janson, junior, who came out to Chontales pur- 

 posely to collect the insects ; and I afterwards obtained 

 it in great numbers. The use of the curious brushes on 

 the antennae is not known. Another longicorn, about the 

 same size (Coremia hirtipes), has its two hindmost legs 

 greatly lengthened, and furnished with brushes : one I 

 saw on a branch was flourishing these brushes in the 

 air, and I thought at first they were two black flies 

 hovering over the branch, my attention being taken from 

 the body of the beetle by the movement of the brushes. 



Another fine longicorn, figured in Plate, Deliathis nicea, 

 looks as if made of pure white porcelain spotted with 



