18 
taken by Mares at Ingalton, Du Page County, on Octo- 
ber 13 of the same year may have been a member of 
the same migration. Apparently such occurrences of 
mexicana in Illinois are sporadic and irregular. 
There are also two records of this butterfly from 
Hessville, Lake County, Indiana, both at the same time 
of year as most of those from Illinois: October 16, 
1904, and October 7, 1917, Wyatt (FMNH). 
Eurema lisa (Boisduval & Le Conte) 
Little sulphur 
Xanthidia lisa Boisduval & Le Conte 1829:53 (type- 
locality “United States’). 
Terias lisa: Worthington 1880:47. 
Eurema lisa: Holland 1931:302; Klots 1951:198; dos 
Passos 1964:47 (No. 315). 
Illinois records.—Map 43. 
The little sulphur is found throughout Illinois and 
is common. Light yellow to white females are frequent- 
ly found. Earliest and latest dates on record are April 
54 and October 23, and the species is most numerous 
from late July through early September. 
Eurema nicippe (Cramer) 
Sleepy orange 
Papilio nicippe Cramer 1780(3) :31 (type-locality “Vir- 
ginia’”’). 
Terias nicippe: Worthington 1880: 47. 
Eurema nicippe: Holland 1931:301; Klots 1951:197; 
dos Passos 1964:47 (No. 319). 
Illinois records—Map 44. 
We have records of nicippe from throughout Ilh- 
nois except the extreme northwestern counties, where, 
however, it probably also occurs. It is rare in the Chi- 
cago area, where there is only one recent record. Else- 
where in northern Illinois it is intensely local but often 
abundant where it is found. It is probably commoner 
and more widespread in the southern half of the state; 
Holland (1931) spoke of its abundance there. In north- 
ern Livingston County, just south of Streator along 
the Vermilion River, it occupies a locality only a few 
acres in extent, where it has fluctuated in numbers from 
extreme abundance (1943-1954) through a decline 
(1955-1958) and period of apparent absence (1959— 
1962) to reappearance in 1963 and a gradual increase 
since then. Similar restricted habitats probably occur 
elsewhere in northern Illinois, where the host plant wild 
senna (Cassia) occurs. Its decline at the Streator local- 
ity was probably attributable to the rarity of its host; 
the plant was not seen during the period the butterfly 
was not present. 
Of the thousands of nicippe we have seen and cap- 
tured, only one has been of the rare yellow form 
flava, a male taken at the above locality south of 
Streator in Livingston County, September 101903; 
Irwin (INHS). There is another form with the under- 
side reddish instead of the normal yellow, which is un- 
known to us from the state. A few dwarfs of both sexes 
have been taken. 
There are probably three broods, with the third 
emerging in mid-August and flying through September 
(Streator) being the largest. The earliest and latest 
records are April 15 (Evanston, Cook County) and ear- 
ly November (Elsah, Jersey County). 
Nathalis iole Boisduval 
Dainty sulphur 
Nathalis iole Boisduval 1836:589 (type-locality “Mexi- 
co”): Worthington 1880:47; Holland 1931:283: 
Klots 1951:199; dos Passos 1964:48 (No. 320). 
Illinois records.—Map 45. 
This tiny pierid is found throughout Illinois. I 
varies in numbers from season to season, in some years 
such as 1931 and 1944, it was very abundant and ir 
other years it has been completely absent. It is rare i 
Cook County, where the only records are as follows 
Chicago, October 4, 1931, 10 specimens, Wyatt an 
Lustig (FMNH) ; Chicago, November 13, 1931, Wee 
(FMNH) ; locality and date not specified, two spec 
mens, Leuschner (RL). Frison (INHS) took 51 spec 
mens at Havana, Mason County, October 7, 1931. Th 
earliest date on record is July 4 and the latest is Noverr 
ber 13. Most records are from mid-August throug 
mid-October. 
Anthocharis midea (Hiibner) 
Falcate orange tip 
Mancipium vorax midea Hubner “1806” [1809]: Pla 
142 (type-locality restricted to “Wilmington Islan 
near Savannah, Georgia” by dos Passos & Klc 
1969:6 by designation of neotype) . 
Anthocaris genutia: Worthington 1880:47; Klots 195 
181. 
Euchloé genutta: 
Anthocaris midea: 
Holland 1931:287. 
dos Passos 1964:49 (No. 325). 
Illinois records.—Map 46. 
Apparently locally common to abundant in spri 
in southern Illinois, A. midea is rare or absent no! 
of the approximate latitude of East St. Louis. 7 
northernmost record was in Putnam County, May 
1939, Glenn (MOG). Nielsen took 14 é 4 and 12 $ 
at Wolf Lake Swamp, Union County, April 24, 19 
and reported that he saw “a thousand or more” (GI 
The species was reported as common in open woc 
mid-March to mid-May, at Elsah, Jersey Cou! 
(CLR eye ltaas single-brooded and appears from m1 
March through May 14. 
Cowan (1969) pointed out that the generic nz 
is properly spelled as we have indicated. The Illu 
population may be referable to the recently descri 
subspecies annickae dos Passos and Klots (loc. cit.): 
Euchloé olympia (Edwards) 
Olympia 
Anthocaris olympia Edwards “1871” [1872]:266 (t 
locality “Coalburgh, West Virginia; Dallas, Texa 
Worthington 1880:47. 
Euchloé olympia: Holland 1931:285; Klots 1951: 
dos Passos 1964:50 (No. 329). 
Illinois records —BuREAU COUNTY: probably ( 
Township, G. M. Dodge (Edwards 1884). Cook Cc 
ty: Chicago, May 13, 1917, Wyatt (FMNH). Je 
County: Elsah, “local and rare” (CLR). Lake Cc 
ty: Waukegan Dunes (Illinois Beach State Park) | 
2), well established, common to abundant; many 
ords, May 10 through May 28. 
E. olympia probably occurs locally. elsewhere in 
