known from Illinois. It probably exists in widely scat- 
tered, strongly localized colonies throughout its range. 
From the limited material which has been available 
for study, we have learned that there are two subspecies 
of phaeton in Illinois. The nominate subspecies ap- 
pears to be limited to the northern half of the state; 
all specimens which we have seen from Ogle, Kane, and 
Lake counties are clearly typical phaeton. Southward, 
the subspecies E. p. ozarkae Masters occurs, and there 
is an abrupt clinal separation between the two popula- 
tions. A specimen from Peoria, Peoria County, June 6, 
1959, Taylor (INHS) seems to be somewhat intermediate 
but closer to E. p. phaeton. The butterfly is single- 
brooded, and it has been taken in Illinois between June 
6 and July 4. 
Our distribution map depicts Illinois records of both 
subspecies of phaeton, as well as records based on speci- 
mens which were not studied, and which were there- 
fore not determinable to subspecies, although from their 
geographic location in the state this may be inferred. 
Euphydryas phaeton ozarkae Masters 
Euphydryas phaeton ozarkae Masters 1968:87 (type- 
locality “Lynch Hollow, Camden County, Missouri’). 
Illinois records.—Map 85. 
This recently described subspecies occurs in the south- 
ern half of Illinois. It is readily separable from nomi- 
nate E. p. phaeton by its larger size and reduction in 
the red coloring. The marginal red spots are smaller, 
and those in the fore-wing cell are reduced or absertt; 
the red is paler and more yellowish than in E. p. phae- 
ton. Masters (loc. cit.) indicates that there are striking 
differences in the biology of E. p. phaeton and E. p. 
ozarkae; the latter is associated with Aureolaria rather 
than Chelone glabra, the host of nominate phaeton. It 
flies on high, dry hillsides rather than in marshy areas; 
the flight is faster and stronger, and the males tend to 
stray farther from the host plant than do those of E. p. 
phaeton. 
Material which we have examined from Macoupin, 
Jackson, and Union counties may be assigned to this 
taxon. A female from Carlinville, Macoupin County, 
with a fore wing length of 33 mm, was compared with 
a paratype of E. p. ozarkae and found to agree well 
with it, whereas a male taken in Giant City State Park, 
Jackson County (Fig. 3), conforms to this subspecies 
m | respects and lacks all trace of red in the fore wing 
cell. 
Dates of capture of E. p. ozarkae in Illinois are be- 
tween May 30 and June 13, coinciding with the flight 
period described by Masters (loc. cit.). 
Boloria selene myrina (Cramer) 
Silver bordered fritillary 
_ myrina Cramer 1777(2) :141 (type-locality “New 
ork”). 
Argynnis myrina: Worthington 1880:47. 
Brenthis myrina: Holland 1931:105. 
Boloria selene myrina: Klots 1951:89; dos Passos 1964: 
89 (No. 598b). 
Illinois records.—Map 86. 
€ have records of this species only from the north- 
m half of Illinois. Although Klots (1951) referred to 
788) 
its presence in southern Illinois, we doubt its occur- 
rence there. It appears to have increased in distribution 
and numbers in recent years. It was first taken at 
Streator, La Salle County, in 1968 and was locally abun- 
dant there in 1968-1969. It was also abundant at Goose 
Lake Prairie, Grundy County, in 1968-1970. Probably 
three broods occur in Illinois. The earliest date of cap- 
ture is May 12 and the latest is September 20. 
Boloria bellona (Fabricius) 
Meadow fritillary 
Papilio bellona Fabricius (nec Cramer) 1775:517 (type- 
locality “North America”). 
Argynnis bellona: Worthington 1880:47. 
Brenthis bellona: Holland 1931:111. 
Boloria toddi ammiralis: Klots 1951:92; dos Passos 
1964:89 (No. 599b). 
Illinois records.—Map 87. 
This fritillary is restricted primarily to northeastern 
Illinois. Although locally common, it does not appear 
to be as generally distributed as myrina. There are many 
records of the species from Cook County, but none are 
recent. We have records from Goose Lake Township, 
Grundy County, and Streator, La Salle County, in asso- 
ciation with the more numerous selene. It is locally 
abundant near Danville, Vermilion County, but selene 
has not been recorded from there. This species is a 
denizen of wet meadows, the habitat also favored by 
selene. It is probably triple-brooded. It has been record- 
ed from May 1 through September 14. 
The name bellona (Fabricius) was validated by the 
International -Commission on Zoological Nomenclature 
in Opinion 516 of January 12, 1958. 
Speyeria idalia (Drury) 
Regal fritillary 
Papilio idalia Drury 1773(1) :25 (type-locality restricted 
to “New York City, New York County, New York” 
by dos Passos & Grey 1947:9). 
Argynnis idalia: Worthington 1880:47; Holland 1931: 
84. 
Speyeria idalia: 
(No. 611). 
Illinois records.—Map 88. 
This species is exceedingly local but widely distrib- 
uted and often common where found. It is apparently 
limited primarily to northern Illinois. Its numbers are 
subject to a certain amount of fluctuation from year to 
year. In some areas it occurs very rarely, as at Streator, 
La Salle County, where two have been taken and a 
third observed between 1941 and 1971. As in most 
species of Speyeria in Illinois, males tend to appear and 
disappear earlier in the season than do females. We 
have records of capture between June 5 and September 
25, 
Klots 1951:86; dos Passos 1964:91 
Speyeria atlantis (Edwards) 
Atlantis fritillary 
Argynnis atlantis Edwards 1862a:54 (type-locality re- 
stricted to “Hunter, [Greene County,] New York” by 
dos Passos 1935:86); Worthington 1880:47; Hol- 
land 1931:90. 
