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VIII. On the Pyralidina collected in 1874 and 1875 by 

 Dr. J. W. H. Trail in the Basin of the Amazons. 

 By William Warren, M.A., F.E.S. 



[Read February 6tb, 1889.] 



The insects treated of in the accompanying paper were 

 collected in 1874 and 1875 by Dr. J. W. H. Trail in the 

 Basin of the Amazons. The Ehopalocera and larger 

 Heterocera were worked through and described by 

 Mr. A. G. Butler in papers published in the ' Trans- 

 actions ' of the Entomological Society of London for the 

 years 1877, 1878, and 1879. The remainder, namely, 

 Deltoids and Pyralidina, were about the same period 

 cursorily inspected, and in some cases identified, by the 

 same gentleman ; but from pressure of work and other 

 causes were not exhaustively worked out and made the 

 subject of a fourth paper. This unfortunate delay is 

 all the more to be regretted, inasmuch as the collection 

 contains not only several species at present unrepre- 

 sented in the British Museum Collection, but likewise a 

 considerable number of curious and aberrant forms. 



The specimens themselves are 293 in number, be- 

 longing to 125 different species, about 50 of which I 

 have been unable to identify as previously described or 

 figured, while in several cases the formation of new 

 genera has seemed necessary. 



For the circumstances under which the collection was 

 made, and the precise localities explored, it will be 

 enough to refer to Mr. Butler's first paper, published in 

 the ' Transactions ' of the Entomological Society of 

 London for 1877, p. 105. 



There are, however, a few species to which special 

 reference seems called for. And first, there are two very 

 remarkable sj^ecies of Pseudo-deltoids, viz., an example 

 of Tortricodes alucitalis of Guenee, described by him 

 from a single damaged specimen, and a new species 

 more closely allied to Walker's Gaherasa ambigualis, in 



TRANS. ENT. SOC. LOND. 1889. PART II. (jUNE.) 



