Pharnacia rigida Redtenbacher, 1908 Pharnacia sumatrana[1] or Sumatran Stick Insect is a species of stick insect endemic to Peninsular Malaysia, Sumatra, Java.

Females are large and have a body length over 200 mm (7.9 in).

Males are much smaller, with a body length of about 120 mm (4.7 in).

Males have wings but are poor fliers.

This Phasmatodea related article is a stub.