1889.] hilt ontology. 1025 
The specimens collected in the northern and the north-western por- 
tions of Nebraska were made during the months of July and August, 
1889. The line of counties from which collections were made, it will 
be noticed, runs from south-east Nebraska, the lowest portion of the 
State, to north-west Nebraska, the part of the State having the greatest 
1. Papilio aj'ax. — Ajax Butterfly. Adams, Dodge and Nemaha 
counties. Found from the first of April till the last of October, 
though at no time abundant. Several forms. 
2. F. philenor.—Oxaxxge-handedi Butterfly. Dodge and Nemaha. 
Somewhat rare. Earliest found about the first of June, though prob- 
ably may be collected in May. 
3- jP. asterias. — Black Swallow-tail Butterfly. Dodge and Nemaha. 
Appears about the middle of May, but most plentiful the first of June, 
though at no time very common. 
4- P. palamedes.—0\\^^-\A3.cV Swallow-tail Butterfly. Dodge, Mr. 
E. A. Dodge mentions capturing one specimen. Not seen by us. 
5. P. turnus. — Yellow Swallow-tail. Dodge and Nemaha. Found 
as early as April 15th, becoming very common the last of this month 
and the first of May. Rare in the fall, and but few males and some 
variations in markings of females. 
6. P. r;rj//^£7«/'^'.y.— Yellow-banded Swallow-tail. Dodge and Nema. 
ha. The first brood appear in abundance the last of May and first of 
June. Second brood common in August, becoming very rare by the 
last of September. 
FAMILY PIERID.t. 
7. Picris protodice — Banded-white Butterfly. Dawes, Dodge, Lan- 
caster, Nemaha and Sheridan. Found as early as the first of May, and 
continuing till late in the fall. According to Mr. C. Cr. McMillan, 
Nebraska species, as at other points, " commonly appear twice during 
the season, first in May and last in July or early in August." Some- 
what common in eastern Nebraska, but more common in north-western 
Nebraska, where we have observed it, and in south-western part of the 
State where it was (,bser\ed by Mr. McMillan. 
8. P. y/<?^/._white Butterfly. Lancaster and Nemaha.- One speci- 
men taken near Peru, May i6th, 1889, and Mr. McMillan mentions, 
one specimen collected by him in Lancaster county. 
9. P. n?/^.— Cabbage Butterfly. Dodge, Lancaster and Nemaha. 
Found as early as the first of April, and abundant by the middle of 
