■ Taxonomic and Host Catalogue of the Tachinidae of America North of Mexico
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Genus ACTIA Robineau-Desvoidy, 1830

ACTIA Robineau-Desvoidy, 1830: 85. Type species: Roeselia lamia Meigen, 1838, by designation under Plenary Powers of ICZN, 1987: 71 [Palearctic].
ACTIOPSIS Townsend, 1917a: 121. Type species: Actiopsis autumnalis Townsend, 1917, by original designation.

autumnalis (Townsend, 1917).– Ontario to New Brunswick, south to Missouri and North Carolina (O'Hara, 1991), New Mexico (CNC).
– Actiopsis autumnalis Townsend, 1917a: 122. Type data: holotype female (USNM). Type locality: USA, Maryland, Grove Hill.

dasymyia O'Hara, 1991.– Northwest Territories [and Nunavut], Yukon, Colorado (O'Hara, 1991).
– Actia dasymyia O'Hara, 1991: 761. Type data: holotype male (CNC). Type locality: Canada, Northwest Territories, 21 miles east of Tuktoyaktuk.

diffidens Curran, 1933.– Widespread throughout Canada and northern and eastern United States, also California, Colorado, Mexico and Texas (O'Hara, 1991), New Mexico (CNC).
– Actia diffidens Curran, 1933a: 5. Type data: holotype male (CNC). Type locality: Canada, Nova Scotia, Kentville.

Hosts from Arnaud (1978: 52)*
Lepidoptera, Olethreutidae
Spilonota ocellana (Denis & Schiffermüller)
Lepidoptera, Tortricidae
Acleris variana (Fernald), Choristoneura conflictana (Walker)

dimorpha O'Hara, 1991.– Ontario, New York, New Hampshire, South Carolina, Georgia, Florida (O'Hara, 1991).
– Actia dimorpha O'Hara, 1991: 755. Type data: holotype male (CNC). Type locality: USA, Georgia, McIntosh County, Sapelo Island.

interrupta Curran, 1933.– Alaska and British Columbia to Newfoundland, south to California in west and Virginia and Tennessee in east, not recorded from most of central United States except for Colorado (O'Hara, 1991).
– Actia interrupta Curran, 1933a: 6. Type data: holotype male (AMNH). Type locality: USA, New York, Tuxedo, Station for the Study of Insects.

Hosts from Arnaud (1978: 53)*
Lepidoptera, Geometridae
Melanolophia imitata (Walker)
Lepidoptera, Notodontidae
Schizura concinna (J.E. Smith)
Lepidoptera, Olethreutidae
Epinotia crenana (Hübner), Epinotia emarginana (Walsingham), Grapholitha molesta (Busck)
Lepidoptera, Tortricidae
Acleris variana (Fernald), Acleris variegana (Denis & Schiffermüller), Amorbia cuneana (Walsingham), Archippus packardianus (Fernald), Archips argyrospilus (Walker), Archips rosanus (Linnaeus), Archips spp. (including A. argyrospilus (Walker) and/or A. griseus (Robinson)), Choristoneura conflictana (Walker), Choristoneura fumiferana (Clemens), Choristoneura pinus Freeman, Choristoneura rosaceana (Harris), Croesia albicomana (Clemens), Phalonia oenotherana Riley, Xenotemna pallorana (Robinson)
Hosts from Arnaud (1978: 54) for sp. near interrupta Curran*
Lepidoptera, Tortricidae
Archips cerasivoranus (Fitch), Archips fervidanus (Clemens)

labellata Kamran, 1980.
– Actia labellata Kamran, 1980: 52. Nomen nudum.

pauciseta Kamran, 1980.
– Actia pauciseta Kamran, 1980: 52. Nomen nudum.

radialis O'Hara, 1991.– Ontario, Québec (O'Hara, 1991).
– Actia radialis O'Hara, 1991: 763. Type data: holotype male (CNC). Type locality: Canada, Québec, Gatineau Park (on Fomes fomentarius).

rufescens (Greene, 1934).– North Dakota, South Dakota, Iowa, Illinois, Michigan, Ohio, Québec, District of Columbia (O'Hara, 1991).
– Actiopsis rufescens Greene, 1934: 34. Type data: holotype female (USNM). Type locality: USA, South Dakota.

sternalis O'Hara, 1991.– Yukon (O'Hara, 1991).
– Actia sternalis O'Hara, 1991: 765. Type data: holotype male (CNC). Type locality: Canada, Yukon, mile 51 of Dempster Highway.

Actia species

Hosts from Arnaud (1978: 56) for Actia spp.*
Lepidoptera, Dioptidae
Phryganidia californica Packard
Lepidoptera, Gelechiidae
Gnorimoschema spp.
Lepidoptera, Noctuidae
Catocala relicta Walker
Lepidoptera, Notodontidae
Heterocampa guttivitta (Walker)
Lepidoptera, Olethreutidae
Epinotia similana (Hübner), Episimus argutanus (Clemens)
Lepidoptera, Tortricidae
Choristoneura pinus Freeman


Arnaud, P.H., Jr. 1978. A host-parasite catalog of North American Tachinidae (Diptera). United States Department of Agriculture. Miscellaneous Publication 1319: 1–860.

*Host names (family and species) have not been changed from those given in Arnaud (1978). Each host is listed under the appropriate current tachinid name, with the tachinid name used in Arnaud (1978) cited if different from the current one. For more information about Arnaud (1978), and to see a complete list of tachinid names used in that work and their modern equivalents, click here.

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