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TaxonomyBrowse
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Genus Scytodes

Please identify this spider - Scytodes thoracica Strange Spider - Scytodes Scytodes sp. - Scytodes Unknown 6-eyed spider - Scytodes fusca Spider 061716bar - Scytodes longipes Scytodes lugubris - female Scytodes lugubris - female Spitting Spider - Scytodes thoracica
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Haplogynes)
Family Scytodidae (Spitting Spiders)
Genus Scytodes
Numbers
7 species in the USA & Canada.
Identification
Carapace Patterns compared to drawings in Valerio, 1981 (1)
Carapace Patterns and leg qualities compared to specimens on BOLDSYSTEMS.org website species pages (updated:2017) (see Internet References below)

S. atlacoya: ♂ (spotted or ringed legs, with darker joints)

S. fusca: ♂ (clear legs, with darker joints)

S. longipes: ♂ (spotted, splotched or ringed legs, with darker joints)

S. lugubris: ♂ (long-thin stripes on legs, with dark joints)

S. Thoracica: ♂ (thickly-banded legs)

S. univittata: ♂ (clear legs, males have modified fore-legs, with two rows of spines)
Range
S. atlacoya - TX (from the Texas Spider List, linked below)
S. dorothea - USA, (CO, TX that I'm sure of)
S. fusca - FL (2)
S. longipes - Pantropical
S. lugubris - Pantropical
S. thoracica - Eastern States and adjacent Canada to Indiana (2)
S. univittata - TX to CA (2)
S. zapatana - USA
Internet References
~ Texas Spider List - List of species found in Texas.
~ http://digitallibrary.amnh.org - Spiders From the Southwestern United States with Descriptions of New Species, Gertsch, 1935.
~ Possible Scytodes lugubris by Pen Araneae on Flickr
~ Comparative Biology of cave-dwelling Spitting Spiders - 2011 Article with images and information about this genus.
~ BOLDSYSTEMS page for the genus Scytodes - These are specimens verified by DNA testing.
Works Cited
1.Spitting Spiders (Araneae, Scytodidae, Scytodes) from Central America.
Valerio, C.E. (1981). 1981. Bull. AMNH 170: 80-89.
2.How to Know the Spiders
B. J. Kaston. 1978. WCB/McGraw-Hill.