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World Genera of Tachinidae | Manual of Nearctic Diptera | Bertha Armyworm | Choristoneura species
| Tachinids of Bertha Armyworm |
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Key to Tachinid Genera |
This version of the key includes text only with links to the illustrated couplets for convenience. Click here to return to the home page of the illustrated key to the tachinid parasitoids of bertha armyworm.
| 1. | Prosternum haired | Go to 2 | |
| 1'. | Prosternum bare | Go to 8 | |
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| 2. | Parafacial haired | Go to 3 | |
| 2'. | Parafacial bare | Go to 4 | |
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| 3. | Ocellar setae directed forward; katepisternum with two (rarely three) setae | Winthemia R.-D. | |
| 3'. | Ocellar setae directed backward; katepisternum with four or more setae | Spallanzania R.-D. | |
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| 4. | Eye densely haired | Go to 5 | |
| 4'. | Eye not more than sparsely haired | Go to 6 | |
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| 5. | Palpus yellow, facial ridge with erect setae on lower two-thirds or more | Chetogena Rondani | |
| 5'. | Palpus dark coloured, facial ridge with decumbent hairs on lower half or less | Phryxe R.-D. | |
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| 6. | Four katepisternal setae | Lespesia R.-D. | |
| 6'. | Three katepisternal setae | Go to 7 | |
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| 7. | Wing vein M forming a right angle at bend; female with ovipositor unmodified, not sharp and pointed | Exorista Meigen | |
| 7'. | Wing vein M forming an obtuse angle at bend; female with piercing, stinger-like, ovipositor | Blondelia R.-D. | |
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| 8. | Parafacial with down-turned setae; eye bare | Athrycia R.-D. | |
| 8'. | Parafacial bare; eye haired | Go to 9 | |
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| 9. | Male genitalia with basal projection of cerci short, bifid in ventral view; abdominal tergite 5 in female and syntergite 7+8 in male mostly reddish yellow; female with pedicel of antenna yellow | Panzeria R.-D. | |
| 9'. | Male genitalia with basal projection of cerci large, triangular, not bifid in ventral view; abdominal tergite 5 in female and syntergite 7+8 in male black except for silver highlights (pruinosity); female with pedicel of antenna black | Eurithia R.-D. | |
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First published on the Internet in 1998
Last update: 16 March 2003
J.E. O'Hara