Appearance1. Spilopteron franclemonti, new species
(from pages 569 and 570 of THE US. NATIONAL MUSEUM BULLETIN 216, Part 2, 1960)
Front wing 11 to 14 mm. long; head about 0.91 as wide across midlength of temples as across eyes; punctures on metapleurum of moderate size, separated by about 0.5 to 0.8 their diameter; scutellum with indistinct lateral carina extending most of its length; ovipositor sheath about 1.04 as long as front wing.
Head yellow with the top of head, frons except laterally, and occiput black. In the female the central part of face is usually partly or entirely black or dark brown, a common pattern being a median longitudinal and a sublateral, concentrically curved, dark brown stripe. Antenna with a subapical broad pale yellow band,
the apical 7 ± segments blackish, and more or less pale yellow beneath, basad of the band. Thorax with more or less of lower part of propleurum, narrow anteroventral margin and hind corner of pronotum, tegula, subtegular ridge, usually a spot on mesopleurum next to base of middle coxa, mesepimeron, sometimes a narrow stripe on meso- sternum next to sternaulus, large elliptical spot in upper hind part of metapleurum, usually the apex and sides of median lobe of meso- scutum, lateral edge and rarely mesal edge of lateral lobe of meso- scutum, scutellum, postscutellum and adjacent part of metanotum, and apical 0.35± of propodeum, pale yellow; front and middle legs pale yellow, in the female the coxae partly black basally and the femora partly pale brown behind; hind coxa black, in the male pale yellow below, its apex narrowly pale yellow; hind trochanters and hind tarsus pale yellow; narrow apex and obscure subbasal ring on hind femur pale yellow, the hind femur of male more or less pale yellow below; hind tibia of male pale yellow basally, below, and at apex, the rest somewhat infuscate; hind tibia of female pale yellow basally, the rest yellowish fulvous, brownish toward apex, but at the extreme apex fulvous; first tergite often more or less pale yellow basally; first four through six tergites of male with a broad pale yellow apical band; first two tergites of female with a broad pale yellow subapical band which does not reach the lateral margin; third through fifth tergites of female with variously developed or interrupted, narrow subapical pale yellow bands; ventral part of fourth through seventh tergites and under side of abdomen pale yellow; female subgenital plate pale yellow with a subventral brown stripe that is strongest apically; wings hyaline, the front wing with a large, subcircular, fuscous spot in its apex, and in some females with a small faint fuscous spot over base of radius. The specimens from Michigan and Minnesota have the punctures on the metapleurum denser (separated by about 0.5 their diameter) and the yellow markings a little less extensive than in specimens from farther east. They may represent a distinguishable subspecies.
NamingSpilopteron franclemonti Townes, 1960
DistributionNB to s. MB & MN, south to NY & so. OH
FoodSpilopteron species are parasites on the larvae of wood-boring beetles (Coleoptera).
Some text fragments are auto parsed from Wikipedia.http://www.americaninsects.net/hy/spilopteron-franclemonti.html
THE US. NATIONAL MUSEUM BULLETIN 216, Part 2 https://ia801407.us.archive.org/5/items/bulletinunitedst21621960unit/bulletinunitedst21621960unit.pdf
Ito M. & Maeto K. 2017. Revision of the genus Spilopteron Townes, 1965 (Hymenoptera: Ichneumonidae:
Acaenitinae) from Japan. European Journal of Taxonomy 356: 1–33. https://doi.org/10.5852/ejt.2017.356