INTRODUCTION. Vil 
one of the latter being treated as new. Of the first-mentioned family eighty-seven 
species, and of the latter forty-nine, appear to be peculiar. 
The next six families, viz. the Bombycide, Drepanulide, Psychide, Cosside, 
Arbelidz, and Hepialide, are all very poorly represented in our region, together by 
twenty genera and fifty-four species, twenty-eight of the latter being described as new; 
forty-four of the species seem to be peculiar. 
The Notodontide include 154 species, with thirty-two new, belonging to forty genera ; 
eighty species are as yet only known from the region dealt with. 
The Noctuide include no fewer than 696 species, ranking slightly in excess of the 
Geometridee in point of numbers. They are distributed under 196 genera, one of 
which is regarded as new, as well as 226 of the species. Of the 696 species, more 
than half (381) appear to be peculiar to Central America; many of them have a very 
wide range in South America, extending as far south as Rio Janeiro. 
The Deltoide are very rich in species, being nearly equal to the Zygenide in this 
respect. Sixty-one genera, twenty-four of which are characterized for the first time, 
and 206 species, with 128 new, are enumerated ; of the species, no fewer than 147 
seem to be peculiar. The moths belonging to this family are almost all found in the 
forests, and we have to thank Messrs. G. C. Champion and H. H. Smith for most of 
the specimens described. They are overlooked by most collectors. 
The Euschemide and Uraniide together include only five genera and twenty-two 
species, one of each being described as new; eleven of the species have not been 
recorded from elsewhere. The Uraniide, however, number some large and conspicuous 
forms. 
The Geometride, as already stated, rank next to the Noctuide as regards the 
number of species, but the number of genera is very much less. Of the latter, 148 (as 
against 196 Noctuide), with three new, are enumerated. These include 689 species, 
more than half of them (355) being treated as new; 409 of them, so far as at present 
known, are peculiar to Central America. 
_ The Siculide is a family of limited extent, and the Central-American forms call for 
