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Genus Arethaea - Thread-legged Katydids

Dichopetala nymph female - Arethaea brevicauda - female Thread-legged Katydid, Arethaea - Arethaea gracilipes - male Thin-footed Thread-leg Katydid - Arethaea gracilipes - male Thin-footed Thread-leg Katydid - Arethaea gracilipes - male   - Arethaea gracilipes - female thread-legged katydid - Arethaea ambulator - male south Texas orthopteran - Arethaea katydid, big - Arethaea - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Orthoptera (Grasshoppers, Crickets, Katydids)
Suborder Ensifera (Long-horned Orthoptera)
Infraorder Tettigoniidea (Katydids, Camel Crickets, and relatives)
Family Tettigoniidae (Katydids)
Subfamily Phaneropterinae (Phaneropterine Katydids)
Genus Arethaea (Thread-legged Katydids)
Numbers
15 spp. in our area, 16 spp. total(1)(2)
Size
30-35 mm (A. gracilipes). 42-53 mm (A. phalangium)
Identification
A katydid that seems to have had all parts stretched out to the thinnest possible structures--legs, antennae, and wings. Legs extremely long and slender--hind femora twice as long as abodmen(3). Forewing typically more than 8 times as long as wide:

(NB: wings are shorter than abdomen in females of some sw. spp.)
Eyes elongated, elliptical; pronotum saddle-like, with rounded edges(2):

Structure of face is different from that of similar Insara(4)
Range
se. US + states w. of the Mississippi; Mexico(1)
in our area, A. phalangium is southeastern, others spp. southwestern (many with limited ranges)(4)
A. gracilipes common in AZ(5)
A. constricta KS to central TX
Habitat
Grasses, weeds, and brush in open and in open pine woodlands (A. phalangium).
Season
May-September (A. phalangium); A. constricta comanche is abundant in May in TX(6)
Food
Foliage of herbaceous vegetation, and perhaps of woody plants as well(6)
See Also
Scudderia, especially long-legged spp. (e.g., S. texensis)
Insara (see key in(4))
Works Cited
1.Orthoptera Species File Online
2.Field Guide To Grasshoppers, Katydids, And Crickets Of The United States
John L. Capinera, Ralph D. Scott, Thomas J. Walker. 2004. Cornell University Press.
3.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
4.Singing Insects of North America
5.How to Know the Grasshoppers, Cockroaches, and Their Allies
Jacques R. Helfer. 1962. Wm. C. Brown Company.
6.Insects of the Texas Lost Pines (W.L. Moody, Jr., Natural History Series, No. 33)
Stephen W. Taber, Scott B. Fleenor. 2003. M University Press.