Ichneumon stramentor ♀︎

Last update: 15 March 2020
SPECIES: Ichneumon stramentor
GENUS: ICHNEUMON
FAMILY: Ichneumon wasps (ICHNEUMONIDAE)



OBSERVATION:
2019-IV-05

YEARS:
2019

MONTHS:
JanFebMarAprMayJunJulAugSepOctNovDec


Ichneumon stramentor ♀︎

1. DISTRIBUTION

Ichneumon stramentor [1,2,3,4,5] is a common wasp and one of the most occurring wasps throughout the Netherlands [2].

In some older literature it is called I. stramentarius, which is another Ichneumon species [7].

 

2. BEHAVIOUR

2.1. ACTIVITY

The species is active from February to October [2].

2.2. DEVELOPMENT

The species overwinters as larva and has possibly more generations per year [6]. The larvae pupate in the ground in May [6].

Development take on average 27 days for females and 26 days for males [6].

 

3. PARASITIC RELATIONS

I. stramentor is a. probably polyphagous [6], endoparasitoid on moths from the Noctuidae family [6], on the following species occurring in the Netherlands [7]:

Owlet moths
(NOCTUIDAE)
Anaplectoides prasinus [6]
Apamea sordens [6]
Diarsia brunnea [6]
Noctua fimbriata [6]
Orthosia cerasi [6]
Orthosia incerta [6]
Phlogophora meticulosa [6]
Xestia baja [6]
Xestia ditrapezium [6]
Xestia stigmatica (syn. X. rhomboidae [8]) [6]
Xestia trianglum [6]

The following hosts have been observed in the garden:

Owlet moths
(NOCTUIDAE)
Large yellow underwing (Noctua pronuba) [6]
Angle shades (Phlogophora meticulosa) [6]
Setaceous Hebrew character (Xestia c-nigrum) [6]

 

3. IDENTIFICATION

It is a large wasp with a length of 13 – 15 mm [2].

The characteristics of I. stramentor are [5]:

Females

Ichneumon stramentor ♀︎
  1. Tergites 2 and 3 yellow
Ichneumon stramentor ♀︎, tergites 2 and 3 yellow

2. Tergites 5, 6 and 7 with yellow spot, spot 5 smaller than spot 6

Ichneumon stramentor ♀︎, tegites 7, 6 and 5 with spot, spot 5 smaller than 6

3. Scutellum yellow

Ichneumon stramentor ♀︎, scutellum yellow

4. Pronotum black

Ichneumon stramentor ♀︎, pronotum black

5. Hind leg black
6. Hind tibia with yellow band, black on extreme base and lower edge

Ichneumon stramentor ♀︎, hind leg with yellow band, black on extreme base and lower edge

7. Tarsus members hind leg black
8. Tarsus members 2 and 3 with lightbrown base

Ichneumon stramentor ♀︎, hindleg tarsus members black with members 1 and 2 lightbrown

9. Tarsus member 3 hind leg length = 1,5 x width in middle

Ichneumon stramentor ♀︎, 3rd tarsus member length is 1,5 x width

10. Temples directly behind eyes converging

Ichneumon stramentor ♀︎, temples directy behind eyes converging

11. Underside coxa hind leg with scopa (hair patch)

Ichneumon stramentor ♀︎, coxa hindleg with scopa (hair patch)

References

1 Nederlands Soortenregister

2 Waarneming.nl

3 BROAD, Gavin. Identification key to the subfamilies of Ichneumonidae (Hymenoptera). Natural History Museum, London, 2011.

4 PERKINS, James F. Hymenoptera: Ichneumonoidea, Ichneumonidae, key to subfamilies and Ichneumoninae.

5 PERKINS, John Frederick. Hymenoptera, Ichneumonoidea: Ichneumonidae I.[and] Ichneumoninae II, Alomyinae, Agriotypinae and Lycorininae.

6 HINZ, Rolf; HORSTMANN, Klaus. Über Wirtsbeziehungen europäischer Ichneumon-Arten.

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