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Haliday, 1844 comparative info return to: prev home
Flagellomeres in males of most species similar to those of females, but
pedicellate with whorls of setae in some species; some species with pedicellate
flagellomeres have an incomplete second whorl of setae on the basal funicular segment.
Scutellum slightly overhanging dorsellum. Forewing almost never with fuscate regions;
almost always with 2-3 setal tracks radiating from stigmal apex, rarely with tracks not
discernable; postmarginal vein 1.1-1.75x stigmal vein length. Propodeum almost
always with median carina (absent in some species where the propodeum is very
short or with strong rugae); subgenus Secodelloidea Girault with strongly rugose
propodeum. Apical gastral tergite much shorter than preceding tergite in
most species (many exceptions, but these are extralimital). Compare with: Parasecodella,
1a-b: Typical Euderus gaster (left), and forewing (right)
2a-b: Typical Euderus propodeum (left), and Euderus (Secodelloidea)
3a-b: Euderus female antenna (left), and E. viridilineatus Yoshimoto
male antenna (right, atypical of genus)
Biology: Primary or
secondary (through Ichneumonoids) parasitoids of larvae in concealed situations
(Lepidoptera, Coleoptera, Cynipidae).
genus, and difficult to define with universally applicable characters. Many exceptional
forms are locally common in certain areas, especially forms that would seem to approach or
Parasecodella: Forewing with
indistinct or no setal tracks radiating from stigma, and: females
with both pedicel and 1st funicular segment 2x longer than broad,
apical funicular segments much shorter than basal ones; males with nodose
flagellomeres and 1st funicular segment with two complete whorls of erect setae.
All characters must be present in combination, as any of them may occur in Euderus.
The character most infrequently found in Euderus is the lack of setal tracks
radiating from the stigma.
Allocerastichus: Antennal radicle
elongate, nearly as long as pedicel. Propodeum without
median carina. Gt1 with 2 or 3 dorsal carinae in females,
1 in males; last gastral tergite much longer than preceding tergite in females of
Carlyleia: No rows of setae
radiating from stigma. Propodeum without median carina. Last
gastral tergite much longer than preceding tergite in all females.
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Boucek, Z. 1963. Studien über europäische Eulophidae, III:
Euderinae (Hymenoptera: Chalcidoidea). Beiträge zur Entomologie. 13:
Coote, L.D. 1994. Review of Nearctic genera of Euderinae
(Hymenoptera: Eulophidae), with descriptions of two new species of Allocerastichus
Masi, and redescription of Carlyleia marilandica Girault. Canadian Journal of
Zoology. 72: 1044-1054.
Schauff, M.E., J. LaSalle, & L.D. Coote. 1997. Chapter 10.
Eulophidae. in "Annotated Keys to the Genera of Nearctic Chalcidoidea
(Hymenoptera)". G.A.P. Gibson & J.T. Huber, eds. NRC Research Press, Ottawa.
Yoshimoto, C. 1971. Revision of the genus Euderus of
America north of Mexico (Hymenoptera: Eulophidae). Canadian Entomologist. 103:
Image credits: 1a-b, 3a-b: Coote (1994). 2a-b: Schauff, et al.