MACROLEPIDOPTERA AND THEIR PARASITES 15 
FAMILY HESPERIIDAE 
EPARGYREUS TITYRUS Fas. 
Food plants: Black locust, ground nut, wisteria. 
Occurrence: Collections from Vermont, Massachusetts, Rhode Island, Connecti- 
cut, New York, New Jersey, and Pennsylvania. Larvae solitary and usually 
found between leaves spun together with silk. 
Totals received: Collections, 157; larvae, 2,777; years, 11. 
Larvae: July to October. 
Pupae: Fall to spring, and late July to August. 
Adults: Late May to July, and August to September. 
Generations: One or two (at least a partial second generation). 
Parasites 
Collections yielding 
this parasite 
i Parasite Years 
specimens | recovered Sah, 
Number of | Number of 
collections larvae 
Diptera: 
Achaetoneura aletiae Riley___--.----------_--------- 2 2 2 63 
Compsilura concinnata Meig__._.--------------+---- 23 4 9 151 
Phorocera claripennis Macq------------------------- 7 2 3 43 
Tachinidae (unidentified puparia)_____-____-_____- 3 2 3 90 
Zen ultagoland ay OS ees= =: aaa ue eee 3 2 3 76 
ZC TUAOROLTALESp Nei ATIC WV pe ee ro as 1 1 1 54 
Hymenoptera: 
Apanteles arguanidis Riley. o..-22 2-2-2 *29 § 20 511 
CONDO DICTIS Oey eee ek ge eee 1 1 1 9 
ERYNNIS ICELUS ScuD. AND BurRG. 
Food plants: Black locust, aspen, willow. 
Occurrence: Collections from Maine, Massachusetts, New York, and New 
Jersey. Larvae solitary and usually found between leaves spun together with 
silk. 
Totals received: Collections, 15; larvae, 30; years, 4. 
Larvae: August and September, and through to spring. (Hibernates as full- 
grown larva.) 
Pupae:. May and June. 
Adults: June and July. 
Parasites 
| Collections yielding 
this parasite 
Parasite Years 
specimens } recovered 
ra Number of | Number of 
collections larvae 
Diptera: 
Compsilura concinnata Meig_._.----_-.------------- 2 1 1 
Sturmia fraudulenta v.d.W_...-.--------.----------- 1 1 i 4 
4 
- Tachinidae (unidentified puparia)__.._.____________ 2 2 2 
ERYNNIS SP. (HORATIUS S. AND B. AND JUVENALIS FAB.) . 
Food plants: Oak—black, red, and serub.. 
Occurrence: All collections from eastern Massachusetts. Larvae solitary; 
usually found on upper side’ of leaf, a part of which is folded over to afford it 
protection. ee TO TR oes 
Totals received: Collections, 24; larvae, 148; years, 6. 
Larvae: Active June to October, hibernating in last instar. 
Pupae: July to August, and late April to May. 
Adults: Late May to June, and late July to August. 
