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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
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1a. Tarsi with fewer than 5 segments and clawless
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1b. Tarsi with 5 segments and clawed
......... Mengeidae
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2a. Tarsi with 4 segments
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2b. Tarsi with 2-3 segments
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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
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Females
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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
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2a. Cephalothorax without hook-like projections behind spiracles
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2b. Cephalothorax with hook-like projections
behind spiracles .......... Stichotrematidae
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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
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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
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