-MACROLEPIDOPTERA AND THEIR PARASITES 13 
CYNTHIA CARDUI L. 
Food plants: Burdock, hollyhock, thistle. 
Occurrence: Collections from New England, New York, and New Jersey. 
Occasionally causes some concern to owners of gardens growing hollyhocks. 
Some years it is extremely rare, possibly entirely absent from New England, and 
in other years it appears in abundance. 
Totals received: Collections, 32; larvae, 846; years, 4. 
Larvae: June to September. 
Pupae: July to September. 
Adults: Issue July to September. 
Generations: One or two. 
Parasites 
Collections yielding 
this parasite 
Parasite Years 
specimens | recovered 
Number of | Number of 
collections larvae 
Diptera: 
Achaetoneura archippivora Will_.._.---------------- 11 2 4 162 
IE TAULL AR ELEL LA St OV. cy els we a ae een Der in 1 1 1 75 
Hymenoovtera: 
Amblyteles rufiventris Brullé__-___------------------ 114 3 | 13 682 
Coclopisthoid caine Spees ae sae eee ee aS ee ae 1 1 21 
Ephialtes (Itoplectis) conquisitor Say __-_------------- 1 1 1 28 
INTCECOTAUS/ SIO ee eye ah Ie RLS SAIC Ah oN ah cS 1 1 1 4 
BASILARCHIA ARTHEMIS DRUv. 
Food plants: Apple, wild black cherry. 
Occurrence: Collections from Middlesex, Vt., and Boxford, Mass. 
Totals received: Collections, 2; larvae, 4; years, 2. 
Larvae: Active May and June. (Hibernate as larvae.) 
Pupae: June and July. 
Adults: Issue late June to July. 
BASILARCHIA ARTHEMIS ASTYANAX FAB. 
Food plants: Apple, wild black cherry. 
Occurrence: Collections from Vermont, Massachusetts, and New Jersey. 
Totals received: Collections, 19; larvae and pupae, 24; years, 8. 
Larvae: Active May to August. (Hibernate as larvae.) 
Pupae: May to August. 
Adults: Issue late May to August. 
Generations: At least two. 
Parasites 
Collections yielding 
this parasite 
Parasite Years 
specimens | recovered 
Number of Number of 
collections | _Jarvae 
or pupae 
Diptera: 
Compsilura concinnata Meig_____-_.__-_-_-________--- 1 1 1 1 
Hymenoptera: 
Pteromalus archippi How___-_-------------_-------- yl 1 1 1 
BASILARCHIA ARCHIPPUS CRAM. 
Food plants: Aspen, willow. 
Occurrence: Collections from New England, New York, New Jersev, and 
Pennsylvania. 
Totals received: Collections, 191; larvae and pupae, 1,039; years, 15. 
