Pacific Beetle Cockroaches

Facts, Identification, & Control

Scientific Name

Diploptera punctata


What Do They Look Like?
  • Size: Adult females are about 5/8 to an inch long, and the male is smaller than the female.
  • Characteristics: This cockroach is also commonly called the cypress cockroach. and has a beetle-like appearance.
  • Body: Adults and nymphs are both dark brown.
  • Wings: Male and female adults have well-developed wings that are dark-brown and covered with small pits. The wings cover the abdomen up to the last abdominal segment.

How Did I Get Pacific Beetle Cockroaches?

The cockroaches are native to Hawaii and are generally found outdoors. However, Pacific beetle cockroaches can enter homes by hitching rides on imported plants that are brought inside. The pests depend on trees to survive. Without their natural food source, Pacific beetle cockroaches do not live for long when trapped indoors.

How Serious Are Pacific Beetle Cockroaches?

These cockroaches feed on tree bark. If left alone they will strip the bark from branches, often leaving the wood underneath bare. A Pacific beetle cockroach also produces a foul-smelling chemical spray that it shoots out to protect itself against predators. For people, this liquid may irritate the eyes or stain skin.

Signs of Infestation

The appearance of the nymphs, adults, or their damage to tree crowns and other plants indicates an infestation.

How Do I Get Rid of Pacific Beetle Cockroaches?

What You Can Do

In the process of feeding on the tree’s branches and bark, they girdle the tree and cause dead areas in the tree’s crown. To manage this problem, remove leaf litter from the crown and below the tree – locations that serve as nesting areas for Pacific beetle cockroaches.

What Orkin Does

Your local Orkin technician is trained to help manage Pacific beetle cockroaches and similar pests. Since every building or home is different, your Orkin technician will design a unique program for your situation.

Orkin can provide the right solution to keep Pacific beetle cockroaches in their place…out of your home, or business.

Behavior, Diet, & Habits

What Do They Eat?

These cockroaches are serious pests of:

  • Cypress Trees
  • Juniper Trees
  • Norway Pine Trees
Life Cycle

The female Pacific beetle cockroach nurtures her offspring internally and gives birth to a brood of about 12 living young every 2-3 weeks. Females mate immediately after they become adults and are protected by the males.

Geographic Range

Pacific beetle cockroaches are commonly found in landscapes of Hawaii. This species may also show up in plant materials that are shipped from regions of the world where the populations are firmly established.