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 : 5-7

Key to adults of tachinid parasitoids of Nearctic Choristoneura species

1. Eye bare or very sparsely haired .................................................................................. 2

– Eye densely haired ( Figs. 1–3 )...................................................................................... 4

2. Wing vein R 1 bare dorsally ...................................................... Ceromasia auricaudata

– Wing vein R 1 haired dorsally along most of its length ( Figs. 12–13 ) ........................... 3

3. Wing vein CuA 1 usually bare dorsally (very rarely with 1–3 hairs) and distal portion of CuA 1 0.27–0.38 length of proximal portion ( Fig. 12 ); male with flagellomere 1 not enlarged ( Fig. 37 ) .................................................................................... Actia diffidens

– Wing vein CuA 1 usually haired dorsally most of distance to crossvein dm­cu (very rarely with as few as 4 hairs) and distal portion of CuA 1 0.37–0.51 length of proximal portion ( Fig. 13 ); male with flagellomere 1 enlarged ( Fig. 38 ) ........... Actia interrupta

4. Prosternum bare .................................................................................. Lypha fumipennis

– Prosternum haired ( Fig. 14 ) ......................................................................................... 5

5. Katepisternum with four setae ( Fig. 4 ) ........................................................ Nilea erecta

– Katepisternum with two or three setae ( Figs. 5–6 , 11 ) ................................................. 6

6. Facial ridge haired on 1/2 or more of distance between vibrissa and lower margin of scape ( Figs. 1–2 ) .......................................................................................................... 7

– Facial ridge haired on 1/3 or less of distance between vibrissa and lower margin of scape ( Fig. 3 )............................................................................................................... 11

7. Eye very large, distance between eye and lower margin of head in lateral view not wider than basal width of maxillary palpus ( Fig. 43 ); two katepisternal setae; katepimeron haired along most of length ......................................... Hemisturmia parva

– Eye smaller, distance between eye and lower margin of head in lateral view several times wider than basal width of maxillary palpus ( Figs. 1–2 ); three katepisternal setae ( Figs. 5–6 ); katepimeron bare or with one to several hairs anteriorly ( Fig. 11 ) ........... 8

8. Maxillary palpus ( Fig. 2 ) dark coloured; katepisternum with lowermost seta nearly equidistant between outer two setae ( Fig. 6 ) ................................................................ 9

– Maxillary palpus yellow; katepisternum with lowermost katepisternal seta closer to anterior than posterior seta (as in Fig. 5 )..................................................................... 10

Abbreviations: ad s, anterodorsal setae; a kepst s, anterior katepisternal seta; ar 3, aristomere 3; a scut s, apical scutellar seta; d scut s, discal scutellar seta; fc rd s, facial ridge setae; l fr s, lowermost frontal seta; l kepst s, lowermost katepisternal seta; max plp, maxillary palpus; oc s, ocellar seta; pafc h, parafacial hairs; p kepst s, posterior katepisternal seta.

Abbreviations (not including veins and crossveins): f cx, fore coxa; h cx, hind coxa; kepm, katepimeron; kepst, katepisternum; trn sut, transverse suture.

9. Facial ridge with hairs decreasing to tiny size on upper portion of haired area ( Fig. 1 ); aristomere 3 evenly tapered to tip ( Fig. 1 ) ........................... Phryxe pecosensis , in part

– Facial ridge with strong setae only ( Fig. 2 ); aristomere 3 thickened along most of length and tapered near tip ( Fig. 2 ) ............................................ Madremyia saundersii

10. Scutellum ( Fig. 11 ) with posterior half orange; discal scutellar setae narrowly separated, distance between them not greater than distance between apical scutellar setae ( Fig. 7 ); female with tiny non­piercing ovipositor; ocellar setae well developed (as in Fig. 3 ) ............................................................................................... Cyzenis incrassata

– Scutellum mostly gray; discal scutellar setae more widely spaced, distance between them twice the distance between apical scutellar setae ( Fig. 8 ); female with long piercing ovipositor ( Fig. 40 ); ocellar setae usually absent or very weak ............................... ................................................................................................... Compsilura concinnata

11. Parafacial with fine hairs on middle portion ( Fig. 3 ) ..................... Smidtia fumiferanae

– Parafacial bare ( Figs. 1–2 ) or with a few hairs directly below lowermost frontal seta... ..................................................................................................................................... 12

12. Mid tibia with one anterodorsal seta ( Fig. 9 ) ............................................................. 13

– Mid tibia with two or more anterodorsal setae ( Fig. 10 ) ............................................ 15

Figures

FIGURES 1 – 10. 1. Phryxe pecosensis, male head. 2. Madremyia saundersii, male head. 3. Smidtia fumiferanae, male head. 4. Nilea erecta, katepisternum. 5. Eumea caesar, katepisternum. 6. Phryxe pecosensis, katepisternum. 7. Cyzenis incrassata, scutellum. 8. Compsilura concinnata, scutellum. 9. Hyphantrophaga blanda, dorsal view of mid leg. 10. Eumea caesar, dorsal view of mid leg.

FIGURES 11 – 13. 11. Lateral view of tachinid thorax. 12. Actia diffidens, right wing. 13. Actia interrupta, right wing.

FIGURES 37 – 42. Habitus images. 37. Actia diffidens. 38. Actia interrupta. 39. Ceromasia auricaudata. 40. Compsilura concinnata. 41. Cyzenis incrassata. 42. Eumea caesar.

FIGURES 14 – 21. 14. Ventral view of prosternum of Hyphantrophaga virilis. 15. Posteroventral view of hind coxae of Hyphantrophaga blanda. 16. Posterior view of head of Hyphantrophaga blanda, female. 17. Posterior view of head of Hyphantrophaga virilis, female. 18. Ventral view of abdomen of Hyphantrophaga blanda, male. 19. Magnified view of area shown in Fig. 18. 20. Ventral view of abdomen of Hyphantrophaga virilis, male. 21. Magnified view of area shown in Fig. 20.

FIGURES 43 – 48. 43. Habitus images. Hemisturmia parva. 44. Hyphantrophaga virilis. 45. Lypha fumipennis. 46. Madremyia saundersii. 47. Nemorilla pyste. 48. Nilea erecta.