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Thomson, 1878 comparative info return to: prev home
4 funicular segments. Notauli complete to scutellar margin or ending in axillae
near the scutellar margin; sublateral grooves of scutellum apparently incomplete
or absent under normal (up to 50x) magnification, extending as distinct grooves
no further than sockets of posterior pair of scutellar setae [but can be seen to be
complete under high magnification with careful observation]. Propodeum in some
species with irregular rugae; median carina present, simple or with a short
anterior split; plicae absent; costula absent. Compare with: Elachertus,
described species. Very similar to Elachertus, and difficult to separate from it
in some cases. It is often difficult to determine degrees of "faintness" of the
sublateral scutellar grooves, and in reality there is no specimen of either genus with
truly incomplete grooves. Careful examination with a high-resolution microscope or
electron microscope can show signs of the groove along the posterior scutellar margin and
the lateral margins immediately posterior to the setal sockets. There are also some
species of Nearctic Elachertus with legitimately "incomplete"
sublateral grooves. These species may more rightly be placed in Miotropis, but
transferring the species is difficult to recommend due to the confused state of the
taxonomy of genera near Elachertus. I strongly doubt that faint sublateral
grooves are homologous in all occurrences in this group. It is likely that the genus is
polyphyletic and that each monophyletic portion of it renders Elachertus paraphyletic
in turn. Nearctic species identifiable as Miotropis using this key may be
currently placed in either genus, and this should be kept in mind by researchers needing a
correct identification of such specimens.
Elachertus: Scutellar grooves in most
species distinctly complete, meeting at posterior margin of scutellum. Some species of Miotropis,
formerly in Cirrospiloideus, have a propodeum with rugulose median panels (the
rugulose areas often marked by a different color from the rest of the propodeum), which
never occurs in Elachertus.
Diglyphomorpha: Scutellar grooves complete,
meeting posteriorly. Plicae present and complete. Scutellum with a sometimes faint median
Askew, R.R. 1968. Hymenoptera 2. Chalcidoidea section (b). Handbooks
for the Identification of British Insects. 8(2)b.
Boucek, Z. 1959. A study of central European Eulophidae, 1:
Eulophinae (Hymenoptera). Acta Entomologica Musei Nationalis Pragae. 33:
Boucek, Z. 1977. Descriptions of two new species of Neotropical
Eulophidae (Hymenoptera) of economic interest, with taxonomic notes on related species and
genera. Bulletin of Entomological Research. 67(1): 1-15.
LaSalle, J. & M.E. Schauff. 1992. Preliminary studies on
Neotropical Eulophidae (Hymenoptera: Chalcidoidea): Ashmead, Cameron, Howard, and Walker
species. Contributions of the American Entomological Institute 27.
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.
Image credits: 1a: Schauff, et al. (1997).