• Cambodia, Indo-China, Asia Tropical
• Thailand, Asia Tropical
• Borneo, Asia Tropical
• Jawa, Asia Tropical
• Lesser Sunda Is., Asia Tropical
• Malaya, Asia Tropical
• Philippines, Asia Tropical
• Sumatera, Asia Tropical

First of the genus Arachnis to be described (1886); hence the type species.

Common Name: Black Scorpion Orchid, แมลงปอลาย
Etymology ‘Arachnis’ referring to floral form that resembles arachnids of the order Scorpiones, hence the popular name, Scorpion Orchid; ‘flos-aeris’, flowers of the air.

• Aerides arachnites Sw. (1800)
• Aerides matutina Willd. (1805)
• Arachnanthe flos-aeris (L.) J.J.Sm. (1905)
• Arachnanthe moschifera (Blume) Blume (1849)
• Arachnis flos-aeris var. gracilis Holttum (1935)
• Arachnis moschifera Blume (1825)
• Epidendrum aerosanthum St.-Lag. (1880)
• Epidendrum flos-aeris L. (1753)
• Limodorum flos-aeris (L.) Sw. (1799)
• Renanthera arachnites (Sw.) Lindl. (1833)
• Renanthera flos-aeris (L.) Rchb.f. (1855)
• Renanthera moschifera (Blume) Knuth (1904)

Arachnis × maingayi (27)	Arachnis flos-aeris × Arachnis hookeriana
Arachnis Brown Pixie (1)	Arachnis flos-aeris × Arachnis sulingi
Papilandachnis Floraweb	Arachnis flos-aeris × Papilionanda Emma van Deventer
Papilachnis Amanda Reha Zahran (2)	Arachnis flos-aeris × Papilionanthe Poepoe
Pararachnis Kiat Tan (1)	Arachnis flos-aeris × Paraphalaenopsis denevei
Limara Mandai Majesty (1)	Arachnis flos-aeris × Renanopsis Lena Rowold
Aranthera Bart AKA Anthony	Arachnis flos-aeris × Renanthera citrina
Aranthera Rainbow	Arachnis flos-aeris × Renanthera storiei
Arachnostylis Imron Rachmad Supeno (4)	Arachnis flos-aeris × Rhynchostylis gigantea
Arachnoglottis N. Sorapure	Arachnis flos-aeris × Trichoglottis fasciata
Aranda Ruby Pestana	Arachnis flos-aeris × Vanda coerulea
Aranda Punctata (8)	Arachnis flos-aeris × Vanda dearei
Aranda Grandeur (4)	Arachnis flos-aeris × Vanda Ellen Noa
Aranda Daniel Sato	Arachnis flos-aeris × Vanda Emily Notley
Aranda Yunos	Arachnis flos-aeris × Vanda Fair Queen
Aranda Satrya Bagaskara	Arachnis flos-aeris × Vanda flavobrunnea
Aranda Moscudder	Arachnis flos-aeris × Vanda Frank Scudder
Aranda Choo Lai Keun	Arachnis flos-aeris × Vanda insignis
Aranda Gladys Goh	Arachnis flos-aeris × Vanda Iwalani
Aranda Trias Raya Syamsurya (2)	Arachnis flos-aeris × Vanda lamellata
Aranda Eileen N. Duvauchelle	Arachnis flos-aeris × Vanda Ohuohu
Aranda Mem. Lilian Garth	Arachnis flos-aeris × Vanda Rothschildiana
Aranda Tats	Arachnis flos-aeris × Vanda Tatzeri
Aranda Bussaracum	Arachnis flos-aeris × Vanda tessellata
Aranda Arthur Dean	Arachnis flos-aeris × Vanda tricolor
Ramasamyara Rama	Arachnis flos-aeris × Vandachostylis Blue Angel
Vandachnis Premier (7)	Arachnis flos-aeris × Vandopsis lissochiloides
Aeridachnis Alexandra	Aeridachnis Bogor × Arachnis flos-aeris
Aeridachnis Doi Suthep	Aerides lawrenceae × Arachnis flos-aeris
Aeridachnis Rosemoor	Aerides odorata × Arachnis flos-aeris
Arachnis Maggie Oei (28)	Arachnis hookeriana × Arachnis flos-aeris
Arachnis Judy Wee	Arachnis Ishbel × Arachnis flos-aeris
Arachnis Maroon Maggie (4)	Arachnis Maggie Oei × Arachnis flos-aeris
Papilandachnis Sunburst	Papilionanda Josephine van Brero × Arachnis flos-aeris
Aranda Toh Chong Boon	Vanda Harvest Time × Arachnis flos-aeris
Aranda Starfire	Vanda Henrietta Ho × Arachnis flos-aeris
Aranda Le Roy Owen	Vanda Herziana × Arachnis flos-aeris
Aranda Michael Chia	Vanda Leahi × Arachnis flos-aeris
Aranda Dick Johnston	Vanda luzonica × Arachnis flos-aeris
Aranda Hermann-Josef Brinkhaus	Vanda Manisaki × Arachnis flos-aeris
Aranda Yoshiichi Nakagawa	Vanda sanderiana × Arachnis flos-aeris
Aranda Henrique G. Graf	Vanda Trisher × Arachnis flos-aeris
Aranda Cy C. Duvauchelle	Vanda Walter F. Dillingham × Arachnis flos-aeris
Vandachnis Giant	Vandopsis gigantea × Arachnis flos-aeris