27 
kind, general conclusions, I will give here the lists of the North Ameri¬ 
can species of Pieris as given by three authors, Dr. Morris, Mr. Ed¬ 
wards and Mr. Strecker. The latter will, as a matter of course, include 
species described since Dr. Morris’ Synopsis was published, but as 
will be perceived by the lists which show the names considered as 
synonyms, which are unnumbered and belong to the numbered name 
under which they are respectively placed, there is little unanimity in 
reference to what are true species. 
Morris. 
1. Mnnusta. Hub. 
Orseis. Godt. 
Cleomes. Boisd. 
2. Protodice. Boisd. 
3. Sisymbrii. Boisd. 
4. Leucodice. Eversm. 
5. Autodice. Hub-. 
6. Oleracea. Harr. 
7. Casta. Kirb. 
Crucifercuum. Boisd. 
8. Menapia. Feld. 
9. Frigida. Scurid. 
10. Venosa. Scudd. 
11. Marginalia. Scudd. 
12. Pallida Scudd. 
13. Tau. Scudd. 
Edwards. 
1. Oleracea. Boisd. 
(asta: Kirb. 
Crucifer arum. Boisd, 
2 Frigida. Scudd. 
3. Castoria. Reak. 
Resedaz. Boisd. 
4. Rapae. Linn. , 
5. Yreka. Reak. 
6. Venosa. Scudd. 
Nasturtii. Boisd. 
7. Margiualis. Scudd. 
8. Pallida Scudd. 
lberidis Boisd. 
9. Protodice. Boisd. 
10. Occidentalis. Reak. 
11. Sisymbrii. Boisd. 
12. Vernalis. Edw. 
13. Beckerii. Edw. 
14. Monuste. Linn. 
Cleomes. Boisd. 
Orseis. Godt. 
Strecker. 
1. Napi. Linn. 
Venosa. Scudd. 
Nasturtii, Boisd. 
Pallida. Scudd. 
lberidis. Boisd. 
Castor ia. Heak. 
R sedoe. Boisd. 
Olrrac'a. Harr. 
Cruciferarum. Boisd. 
Casta Kiri). 
Frigida. Scudd. 
Huhla. Edw 
2. Virginiensis Edw. 
3. Ranae. Lion. 
M.rginalis. Scudd. 
Yreka. Reak. 
Novanglice "Scudd. 
4. Monuste. Linn. 
Cleomes. Boisd. 
Orseis. Godt. 
Albusta. Sept. 
Phileta. Fabr. 
Suasa Boisd. 
5. Protodice. Boisd. 
Vernalis. Edw. 
6. Occidentalis. Reak. 
7. Sisymbrii. Boisd. 
8. Chjoridice. Hub. 
. Beckerii. Edw. 
9. Calyce. Edw. 
In the midst of this confusion it is difficult to come to a satisfactory 
conclusion as to which are true species and which mere varities unless 
we had specimens of each before us, and even then we should find 
ourselves still involved in doubt. I shall therefore undertake nothing 
more than to present some remarks that may be of some value 
especially to young Entomologists who are studying our butterflies, 
and which will give a general idea of the characteristics and distribu¬ 
tion of the species. 
First we may lessen the list by eliminating those 'in referance to 
which there appears to be now a general agreement that they are but 
varities or foreign. 
Orseis and Cleomes are but synonyms of Mdmiste\ Lcucoclice and 
Autodice of Morris’ list are foreign and not represented in this country; 
Casta and Cruciferarum are synonyms or varities of Oleracea; Mtn- 
apia does not belong to this genus and Tau is but a synonym or 
at most but a varity of that species, and hence does not belong to Pieris. 
The following may also be omitted as confessedly synonyms, varities or 
unknown in this country; Resedae, Nasturtii , lberidis , Ilulda , JLovan- 
glice , ' Albusta , Phileta , and Suasa. 
Monuste is a tropical species found in the extreme southern states, 
West Indies and southward to Brazil. 
/ 
