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Grahamia Erdös, 1966 comparative info return to: prev home
Mandibular formula 3:3. Clypeus not set off by sutures. Transverse frontal groove nearly straight; scrobal depressions uniting shortly before reaching transverse groove, interscrobal process not reaching groove. Flagellar formula strictly 1,4,1 [anellus very tiny, could easily be interpreted as absent]; scape relatively long and narrow: about 5x longer than broad, strongly flattened laterally; flagellum with symmetrical (type 1) peg sensilla. Mesoscutal midlobe with 2 pairs of setae. Forewing always strongly wedge-shaped: nearly 4x longer beyond venation than at parastigma; apical fringe setae short; postmarginal vein about 2x stigmal vein length; no setal tracks radiating from stigma; forewing without fuscate areas. Propodeum without median carina; callus with 2 setae. Petiole distinct, slightly broader than long. Compare with: Chrysocharis, Achrysocharoides.

1a: Grahamia

2a-b: Grahamia face (left), and female antenna (right)

Biology: Grahamia clinius (Walker) is a parasitoid of Haplodiplosis equestris [Cecidomyiidae].

Comments: 2 described species, nearly identical with one another. Very similar to Chrysocharis, but possibly not rendering it paraphyletic.

Comparative information:

Chrysocharis: Always with three anelli, the 3rd large in females: about 0.33x first funicular segment length, but all three anelli disclike in most males, sometimes hard to distinguish. Many species with 2 (rarely 3) claval segments. Transverse frontal groove usually distinctly v-shaped.

Achrysocharoides: Eyes very strongly setose. Flagellar formula usually 3,3,2, sometimes 3,4,1 in males. Mesoscutum and especially scutellum often with distinct groups of pits or longitudinal foveae. Postmarginal vein usually about 1x stigmal vein length, rarely up to 1.4x stigmal vein length (in which case the scutellum has groups of pits). Usually not confusable.

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References

Hansson, 1988. A revision of the genus Mestocharis and a review of the genus Grahamia (Hymenoptera: Eulophidae). Proceedings of the Entomological Society of Washington. 90: 28-36.

Image credits: Hansson (1988).