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For educational purposes only; do not review, quote or abstract:--

A Public Service on the basics of Insect Identification

 

 

STREPSIPTERA

 

(From Bohart, 1941 and Schlinger & Doutt, 1964)

 

(Email Contacts)

 

All known species of Strepsiptera are parasitic, thus a complete key to the order is given.  It is derived from Bohart (1941) and Schlinger & Doutt (1964).  It was noted by Schlinger & Doutt (1964) that males are unknown for Stichotrematidae and females are unknown for Myrmecolacidae.

 

Key to Adults of Families of Strepsiptera

 

[Please refer to <Guide> for illustrations & <Strepsiptera> for order details]

 

Males

 

2

1a.  Tarsi with fewer than 5 segments and clawless

 

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1b.  Tarsi with 5 segments and clawed ......... Mengeidae

 

3

2a.  Tarsi with 4 segments

 

5

2b.  Tarsi with 2-3 segments

 

4

3a.  Antennae with less than 7 segments

 

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3b.  Antennae with 7 segments ......... Myrmecolacidae

 

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4a.  Third and 4th antennal segments laterally fan-like .......... Callipharixenidae

 

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4b.  Only 3rd antennal segment laterally fan-like .......... Stylopidae

 

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5a.  Tarsi with 2 segments; antennae with 4 segments .......... Elenchidae

 

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5b.  Tarsi with 3 segments; antennae with 7 segments ......... Halictophagidae

 

Females

 

 

2

1a.  Adult stage partially endoparasitic, without legs, antennae or eyes

 

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1b.  Adult stage free living, with legs, antennae and eyes ........... Mengeidae

 

3

2a.  Cephalothorax without hook-like projections behind spiracles

 

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2b.  Cephalothorax with hook-like projections behind spiracles .......... Stichotrematidae

 

4

3a.  Cephalothorax with single pair of spiracles; thoracic segments not well defined

 

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3b.  Cephalothorax greatly elongated, with 2 pairs of spiracles, or with head and thoracic segments distinct ............ Callipharixenidae

 

5

4a.  Parasitoids of Homoptera or Gryllidae

 

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4b.  Parasitoids of Hymenoptera ............. Stylopidae

 

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5a.  Brood-passage opening a narrow, linear or oblong slit; thorax prominent .......... Halictophagidae

 

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5b.  Brood-passage opening broad and semicircular; thorax reduced and ringlike in back of brood-passage opening. ............. Elenchidae