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Subspecies
No subspecies are recognized.


Original description
Original spelling: Helorus ruficornis

Foerster A (1856). Hymenopterologische Studien, II. Heft: Chalcidiae und Proctotrupii. Verlag von Ernst ter Meer, Aachen (p. 143).

Locus typicus: Not specified in the original publication, but probably Aachen (Germany) where Foerster lived. The whereabouts of the type(s) are unknown.


Synonyms
Helorus ruficornis Foerster, 1856 (p. 143)
Helorus corruscus Dalla Torre, 1898 (misidentification, misspelling) (nec Haliday, 1857)
Helorus flavipes auct. nec Kieffer, 1907 (misidentification)


Identification
Forewing length 2,8-3,7 mm. Very similar to Helorus coruscus (see there for more information). The specimens figured by Von Achterberg (2006) are in fact Helorus coruscus based on the figure of the pterostigma.


Distribution
The species is often confused (or synonymized) with Helorus coruscus, and therefore most records are unclear. Confirmed records exist for Switzerland, Germany, Austria, Czech Republic, and Scandinavia, but the species is certainly more widespread. Helorus ruficornis also appears to be the species that has recently been introduced to Canada, the USA, and South Africa.
Germany: Niedersachsen, Nordrhein-Westfalen, Bayern, Baden-Württemberg.
 

Biology
Adults have been collected in July to September in Central Europe. The species parasitizes in lacewings (Neuroptera), so far Dichochrysa ventralis and Dichochrysa prasina have been reported as the host species; however, the reports of Dichochrysa ventralis may actually refer to Helorus coruscus.



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