Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


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
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)
15 spp. in our area, 16 spp. total(1)(2)
30-35 mm (A. gracilipes). 42-53 mm (A. phalangium)
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)
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
Grasses, weeds, and brush in open and in open pine woodlands (A. phalangium).
May-September (A. phalangium); A. constricta comanche is abundant in May in TX(6)
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.