16 JOHN B. SMITH. 



Not even for localities are our lists used, much less are our other 

 publications referred to in matters of distribution. Demonstrations 

 of structural identity or differences go for nothing. The races of 

 Smeriuthits cerysii are separated generically, while species very dif- 

 ferent in structure are associated. 



To the Bombycid?e, Family XXII, only 28 genera are referred, 

 and the first of these, represented in our fauna, is Bombyx with mori 

 as type. I am glad Mr. Kirby has so typified the old Linnaean 

 genus. 'I'he only other si)ecies from our fauna is Thauma ribis Hy. 

 Edw., only species of the genus. 



Family XXIII, the Drepanulidse, contains 31 genera, 17, or more 

 than half of them, monotypic. Perophora, with 25 species, is re- 

 ferred here, our fauna credited with one name only, which, however, 

 typifies the genus. Oreta Wlk., supplants Dryopteris Grt., and our 

 species are here listed : marginata is here given as a synonym of 

 rosea, instead of a variety, as it stands in our lists. Lacosoma, with 

 chlridota as type and only species, is also referred here. Under 

 Platypteryx, our species appear without change, save that fasciata 

 Steph. is referred to " N. Amer. ?"; it is quite likely that the ? is 

 justified. The Prionia bilineata of our lists reappears here in Fal- 

 caria Haw., and that ends our representation in the family. Scanning 

 the association here made, rather clo.sely, leaves it an open question 

 whether superficial resemblances rather than structural characters 

 have not been too much controlling. 



Next follows the family Ceratocampidse, and in Aiiisota, which 

 heads the series, we find our three species unchanged, two of them 

 referred from Georgia only, the third from America. Dnjocampa 

 follows, with rubicHiida as type, and six other species from Central 

 and South America. Sphingieampa contains our species only, and 

 var. immacidata Jewett is missing. QuadrUineata and alboUneata 

 by the bye, are credited to Mexico only. Citheronia Hiib. and Ea- 

 des Hiib. are united, and our species otherwise are unchanged. 

 Coloradla ends the series. Omitting the last, the family is a sharply 

 limited one. I confess that I would have hesitated about uniting 

 Eacle-i and Citheronia, but am not prepared to say the union is not 

 justifiable. It is only surprising to find it made by Mr. Kirbv, who 

 elsewhere finds no difficulty in separating much more nearly allied 

 forms. 



To Family XXV, the Saturniidoe, 68 genera are referred. Under 

 Attacus we find cinctns, from Arizona, and eryclna Shaw, as doubt- 



