ois but may be overlooked. It strongly resembles Pieris 
apae in flight; for this reason, a sight record from 
eru, La Salle County, cannot be accepted. It is single- 
rooded, with a short flight period. 
RIODINIDAE 
Calephelis muticum McAlpine 
Swamp metalmark 
alephelis muticum McAlpine 1937:43 (type-locality 
“Willis, Washtenaw County, Michigan”). 
ephelisca muticum: Klots 1951:123; dos Passos 1964: 
ei (No. 343). 
Illinois records—Kane County: Elgin, July 12, 
930, July 19, 1930, Herz (FMNH); Elgin, July 12, 
939, (INHS) (Fig. 2); Elgin, July 31, 1920, July 19, 
931, Bristol (AKW). 
Scudder (1889:790) recorded Calephelis borealis 
om the “Township of Ohio” in Bureau County, G. M. 
lodge. The record probably refers to muticum, which 
as undistinguished from borealis at that time, but 
cudder’s date of May 7 is inconsistent with the known 
ight periods of both muticum and borealis. Records 
y Worthington (1880) and Holland (1931) of bore- 
is from Illinois are probably traceable to the same 
uurce. ‘There is one brood, flying in late July as above. 
ristol (personal communication) reported the larvae 
n swamp thistle in June. 
Specimens from the “Chicago, Illinois . . . area” tak- 
1 by Wyatt are mentioned in the original description. 
othing further is known of these specimens; the local- 
y citation may refer to Elgin, which lies within the 
‘eater metropolitan area. 
The generic name Calephelis has recently been vali- 
ated, and Lephelisca suppressed, by’ the International 
ommission on Zoological Nomenclature (McAlpine 
N71). 
LYCAENIDAE 
Harkenclenus titus (Fabricius) 
Coral hairstreak 
esperia titus Fabricius 1793:297 (type-locality “in 
Anglia’) . 
hecla titus: Worthington 1880:48; Holland 1931:242. 
rymon titus: Klots 1951:134. 
arkenclenus titus: dos Passos 1970:28 (No2309)2 
Illinois records.—Map 47. 
It is likely that titus occurs throughout Illinois. It is 
ther common. H. titus is single-brooded, with dates 
Capture between June 2 and August 22. 
Satyrium liparops strigosa (Harris) 
Striped hairstreak 
lecla strigosa Harris 1862a:101 (type-locality “Blue 
Hill, Massachusetts”) ; Worthington 1880:48. 
hecla liparops: Holland 1931:235. 
‘ymon liparops strigosus: Klots 1951:138. 
. 
— liparops strigosa: dos Passos 1970:29 (No. 
. 
19 
Illinois records.—Map 48. 
S. liparops strigosa is widespread in Illinois, but ap- 
parently local and usually occurring only as single in- 
dividuals. Occasionally one finds it in greater num- 
bers, as in the forest preserves near Willow Springs, Cook 
County. Even at such times and places, however, it 
never reaches the abundance of some of its congeners. 
As an example of the nature of its occurrence, in August, 
1966, Irwin took one specimen of strigosa during each 
of four visits to the above locality, on the 5th, 6th, 9th, 
and 12th. There is one brood, with dates of capture 
from June 10 through August 12, but the insect is sel- 
dom encountered after the end of July. 
Satyrium calanus falacer (Godart) 
Banded hairstreak 
Polyommatus falacer Godart “1819” [1824]:633 (type- 
locality “vicinity of Philadelphia, North America”). 
Thecla calanus: Worthington 1880:48; Holland 1931: 
234. 
Strymon falacer: Klots 1951:137. 
Satyrium calanus falacer: dos Passos 1970:29 (No. 
363b). 
Illinois records.—Map 49. 
Recorded from throughout the state, this and H. 
titus are our most common and widespread hairstreaks. 
S. calanus favors much the same habitat as S. edward- 
sw and is frequently found in association with it. This 
hairstreak may be confused with edwardsii and also with 
S. caryaevorus, from which it may not always be dis- 
tinguished by superficial characters. S$. calanus is ap- 
parently also single-brooded but has a longer flight 
season than edwardsii. We have records from May 24 
through August 9. 
Lafontaine (1969, 1970) has recently described Sa- 
tyrium boreale, a new hairstreak very close to falacer 
but apparently founded upon good superficial as well 
as genitalic differences. Inasmuch as. this description 
appeared during an advanced stage of the preparation 
of the present list, it was not feasible to re-examine all 
Illinois falacer to determine the possible occurrence of 
the new species in the state. Lafontaine (loc. cit.) re- 
corded it from Michigan, Ohio, and Pennsylvania, and 
its presence in I]linois is a distinct possibility. 
Satyrium caryaevorus ( McDunnough) 
Hickory hairstreak 
Strymon caryaevorus McDunnough 1942:1 (type-local- 
ity “Merivale, Ontario”); Klots 1951: 137. 
Satyrium caryaevorus: dos Passos 1970:29 (No. 364). 
Illinois records—Apams County: 
1899, Poling, determined by Orley R. Taylor, Jr. 
(USNM). Jackson County: Carbondale, June 9, 
1963, determined by J. C. Downey (JCD). 
Downey (1966) listed caryaevorus only from Cook 
County. Subsequent genitalic study of the material on 
which this record was based has proven it to be S. cala- 
nus falacer. The above records, not listed by Downey 
(Joc. cit.), are the only authenticated ones of caryae- 
vorus from Illinois, but it may be expected to occur 
anywhere in the state. S. caryaevorus is often virtually 
indistinguishable from falacer by superficial characters, 
so that genitalic examination is essential for correct de- 
Quincy, July 
