Bostrichidae
Lesser grain borer ( Rhyzopertha dominica )
The borer ( Bostrichidae ) are a family of beetles while Europe contributed 47 species and sub- species occur. They are similar to bark beetles ( Scolytinae ), but differ significantly in their antennae and eyes.
Features
The beetles are 2-20 mm long and have elongated cylindrical and slightly flattened body and oval shaped eyes. They are either strong, fine hairs, or have no hair. The head of the animal is stretched slightly forward, this is uncovered and covered by the pronotum from above at the subfamilies Dinoderinae and Bostrichinae at the subfamilies Lyctinae and Polycaoninae. Some species have wing covers do not cover the entire abdomen. Their antennae have 9-11 members, where the last two or three segments are thickened into a club. These segments can be thickened comb-like in some species. Both the males and the females have five Tarsenglieder each on all legs. The tarsi are usually long and are partially overlapped by the tibiae in some species. This in turn usually have spines and hooks on the first leg pairs.
Lifestyle and deposits
The beetles bore into wood and are very heat -loving. Some species, such as the lesser grain borer ( Rhyzopertha dominica ) are pests, because they also eat in addition to wood books and their larvae seeds and grains. The borer sometimes achieve a remarkable age. Grain borer can be up to 60 years old, and their surface is then very worn.
Types (selection)
- Grained mountain forest - borer ( Stephanopachys substriatus )
- Lesser grain borer ( Rhyzopertha dominica )
- Bamboo drill ( Dinoderus minutus)
- Ruby borer ( Bostrychus capucinus )
- Horn- borer ( Bostrychoplites cornutus )
- Sinoxylon perforans
- Xylopertha retusa