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Key to the species of Rhagoletotrypeta

The following key is copied from Norrbom (1994).

1. Scutum with white mark on transverse suture, usually extended to intra-alar seta as postsutural lateral stripe (similar to Fig. 2C,E). Aculeus tip length < 0.4x aculeus length (Fig. 10C), in ventral view, apex deeply trilobed (Fig. 10G). 3 spermathecae. (Argentina, southern Brazil, Paraguay, Uruguay). . . . . . . . . . . . 2

- Scutum entirely brown along transverse suture and without lateral postsutural white stripe (similar to Fig. 2D). Aculeus tip length > 0.4x aculeus length (Fig. 10A-B,D-E), in ventral view, apex not trilobed. 2 spermathecae. . . . . . . . . . 4

2. Accessory costal band absent (Fig. 6F). Discal and subapical bands parallel. White area on transverse suture extended across notopleuron. Scutellar basal seta within white area. . . . . . . . parallela Norrbom

- Accessory costal band at least faintly present. Discal and subapical bands divergent anteriorly. Notopleuron entirely brown. Scutellar basal seta within brown area. . . . . . . . . . 3

3. Scutum with complete lateral white stripe from transverse suture to intra-alar seta (similar to Fig. 2E), and anteriorly with pair of submedial stripes of dense microtrichia. Postpronotal lobe entirely white. . . . . . . . . pastranai Aczél

- Scutal lateral white mark comma-shaped, not extended posteriorly beyond level of postsutural supra-alar seta (see Aczél 1951a, Fig. 2B). Scutum without microtrichia. Postpronotal lobe entirely brown or at least with brown margins. . . . . . . . . . . xanthogastra Aczél

4. Wing bands narrow (Fig. 6D-E); width of discal band at R-M < 1.2x length of R-M; width of apical band in cell r₄₊₅ usually < 0.7x length of R-M. Hyaline area between subapical and apical bands often extended slightly into cell r₁. Subbasal band usually extended to apex of vein A₁+Cu₂. Postgena usually brown posteriorly. Aculeus tip simple or flattened in sagittal plane and trilobed in lateral view. . . . . . . . . . . . 5

- Wing bands broad; width of discal band at R-M > 1.5x length of R-M; width of apical band in cell r₄₊₅ usually > length of R-M. Hyaline area between subapical and apical bands not extended into cell r₁. Subbasal band not extended to apex of vein A₁+Cu₂. Postgena entirely yellow. Aculeus tip not flattened in sagittal plane, simple in lateral view (Fig. 10H,I). . . . . . . . . . 8

5. Only syntergite 1+2 and tergite 5 with apical white band, tergites 3-4 entirely brown. (southern Brazil). . . . . . . . . . morgantei Norrbom

- All tergites with apical white bands. . . . . . . . . . 6

6. Subapical band with anterior end strongly basally curved, reaching costa basal to level of posterior end of DM-Cu (Fig. 6C). Accessory costal band absent. Aculeus tip flattened in sagittal plane, trilobed in lateral view (similar to Fig. 10F). (Argentina). . . . . . . . . argentinensis (Aczél)

- Subapical band with anterior end at most slightly basally curved, reaching costa apical to level of posterior end of DM-Cu. Accessory costal band at least faintly present. Aculeus tip variable. (Mexico to Costa Rica). . . . . . . . . . . . 7

7. Aculeus tip flattened in sagittal plane, trilobed in lateral view (Fig. 10F). (Mexico, Costa Rica). . . . . . . . . annulata Aczél

- Aculeus tip slender but not flattened in sagittal plane (Fig. 10B), simple in lateral view (similar to Fig. 10I). (Mexico). . . . . . . . . . . intermedia Norrbom

8. Apical band moderately broad at base, hyaline area between it and subapical band extended at least halfway across cell r₂₊₃. Scutum with submedial stripes of dense microtrichia absent or small and widely separated from lateral microtrichial stripe. Aculeus tip straight in lateral view (Fig. 10I). (New Mexico, Texas). . . . . . . . . . . uniformis Steyskal

- Apical band very broad at base, hyaline area between it and subapical band not extended more than halfway across cell r₂₊₃. Scutum with submedial stripes of dense microtrichia broad and narrowly separated from lateral microtrichial stripe. Aculeus tip with sharp subapical dorsal bend in lateral view (Fig. 10H). (northeastern and midwestern U.S.A.). . . . . . . . . . . rohweri Foote