Choristoneura

O’Hara, James E., 2005, A review of the tachinid parasitoids (Diptera: Tachinidae) of Nearctic Choristoneura species (Lepidoptera: Tortricidae), with keys to adults and puparia, Zootaxa 938, pp. 1-46 : 9

Key to puparia of tachinid parasitoids of Nearctic Choristoneura species

1. Posterior spiracular discs borne on a cylindrical projection that is about as long as wide ( Fig. 36 ) ...................................................................................... Actia interrupta

– Posterior end of puparium without such a projection ( Figs. 22–35 ) ............................ 2

2. Slits of posterior spiracular discs broadened considerably ( Fig. 35 ) ...... Actia diffidens

– Slits narrow ( Figs. 22–34 ) ............................................................................................ 3

3. Each posterior spiracular disc with three slits ( Figs. 27–34 ) ....................................... 4

– Each posterior spiracular disc with four slits ( Figs. 22–26 ) ....................................... 12

4. Prominent bulge present below posterior spiracular discs, much broader and higher than a single disc ( Figs. 31, 33 ) .................................................................................... 5

– Bulge below posterior spiracular discs absent or small, not higher or broader than a single disc ( Figs. 28–30, 32 ) ........................................................................................ 7

5. Posterior spiracular discs scarcely raised above surface of puparium, with shallow grooves between spiracular slits; bulge below spiracular discs rarely extended dorsally to region between discs ( Fig. 33 ) ................................................... Smidtia fumiferanae

– Posterior spiracular discs protruding above surface of puparium, with deep grooves between spiracular slits; bulge below spiracular discs varied along dorsal edge ( Figs. 28, 31 ) ......................................................................................................................... 6

Figures

FIGURES 34 – 36. Tachinid puparia. a, posterior view of posterior spiracular discs (scale bar = 0.1 mm); b, posterior view of posterior spiracular discs and surrounding region; c, lateral view of posterior half of puparium. 34. Lypha fumipennis. 35. Actia diffidens. 36. Actia interrupta.

FIGURES 22 – 27. Tachinid puparia. a, posterior view of posterior spiracular discs (scale bar = 0.1 mm); b, posterior view of posterior spiracular discs and surrounding region; c, lateral view of posterior half of puparium. 22. Cyzenis incrassata. 23. Hyphantrophaga blanda. 24. Madremyia saundersii. 25. Phryxe pecosensis. 26. Nilea erecta. 27. Hyphantrophaga virilis.

FIGURES 28 – 33. Tachinid puparia. a, posterior view of posterior spiracular discs (scale bar = 0.1 mm); b, posterior view of posterior spiracular discs and surrounding region; c, lateral view of posterior half of puparium. 28. Ceromasia auricaudata. 29. Compsilura concinnata. 30. Eumea caesar. 31. Hemisturmia parva. 32. Nemorilla pyste. 33. Smidtia fumiferanae.