| Importantly, sexual selection favors apterous males in several natural populations of a water strider species. |
| In apterous beetles the elytra are often connate, or have both sutures as it were soldered together. |
| Why it is, in the Insecta, that islands should predispose to an apterous state more than continents, it is not easy to speculate. |
| The ratio of alate to apterous adults indicated that relatively higher numbers of alates were found in the control areas. |
| From this egg in the spring emerges an apterous female who makes a gall in the new leaf and lays therein a large number of eggs. |
| It appears to be apterous, and is said in scent and colour to resemble the bed-bug. |
