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Chisos Katydid (Paracyrtophyllus excelsus)
Identification: Length 35-44 mm. Forewings similar in shape to those of common true katydid; males have no knob on third abdominal tergite.
Habitat: Oak woodland.
Season: July to Oct.
Song at 25°C: A raucous wonk produced at a rate of about 1 per s.
Similar species: Paracyrtophyllus robustus has truncated forewings and males that have a large stout erect knob on the third abdominal tergite.
More information: subfamily Pseudophyllinae, genus Paracyrtophyllus
References: Rehn and Hebard 1914, Hebard 1941.