189I.] ENTOMOLOGICAL NEWS. 177 



is a slight possibility that portia may be the Antilles form and 

 troglodyta the North American, but it can never be decided with 

 certainty." 



Now, according to what Dr. Staudinger, Dr. Gundlach, W. 

 F. Kirby and Druce, all good authorities, say, on this point, the 

 home of troglodyta is the Antilles, and our North American rep- 

 resentative is a different insect, which should bear the name of 

 ayidria Scud. 



I, for my part, can only add that on a first, even superficial 

 glance, every body can at once see that the West Indian insect 

 troglodyta is entirely different from ours. A bright, reddish brown 

 color well marked, transverse lines and bands, the anal part of 

 margin of secondaries, well scalloped and longer tails, show it 

 conclusively. 



A. Morrisonii Edw. , of which I possess the types, is nearer to 

 troglodyta than andria, but a smaller insect, of duller brown, 

 and with slight indications only of the transverse line of primaries. 



All the European authors have adhered to the name of Ancea 

 Hiib., instead of Paphia, and I do not see why we should not 

 follow in their footsteps. I, therefore, propose that in the new- 

 Check List of North America Lepidoptera the names stand: 



Ancea Hiib. 



andria Scud. 



^ gly cerium Edw. 187 1 (nee. Doubl.). 

 = Ops. Druce, 1877. 



Western States, Illinois to Nebraska. 

 Morrisonii Edw. 



Arizona, Mexico. 



ELEMENTARY ENTOMOLOGY. 



In studying Lepidoptera it is necessary to have a knowledge 

 of certain anatomical details which can only be learned from in- 

 seption and dissection of the specimens themselves. The classifi- 

 cation is based on the difference in structure of various parts — as 

 the head, body, legs, antennae, and venation of the wings. Slight 

 changes in these parts separate them into families, genera and 

 species. Size and coloration are also taken into account, and 

 are good characters, although subject to individual variation. 



