All of the true ants belong to the group: Super-family Formicoidea. They are all very characteristic in appearance and there are very few other insects which can be mistaken for them.
This is a group of insects commonly known by the popular name of "harvest flies" or cicadas, and frequently in this country by the erroneous term "locust". The family cicadae is a group of large insects containing very many tropical species. Their bodies are large, with a wide, blunt head and with prominent eyes on the outer angles.
The insects of this group are very abundant in the tropics but several species have become spec domesticated and are very abundant in the colder parts of the world. The cockroach type is a very persistent one, and insects of this family cockroaches, existed in great numbers in geologic periods prior to the tertiary.
The insects of this order, comprising all of the true fleas, are ail contained in a single family, the Pulicidae. They are all wingless, the mouth-parts are formed for sucking, and the body is compressed from side to side.
All the true flies, that is, those insects which are called flies and have but two wings, belong to the order Diptera. They are the only insects which possess but two wings, with the exception of the males of the scale insects, and a very few May flies (genera Cloeon and Coenis).
The insects of this family are everywhere abundant both in number of species and individuals. They comprise some of the most destructive insects known and the migratory species have devastated the crops of many countries in the world, more especially Russia, portions of South Europe and Africa, Algeria, India, Cape Colony, the Argentine Republic and some parts of the United States.
Mosquitoes belong to the group Family Culicidae. It's not a large group, but a very important one, not only from the fact that mosquitoes abound in so many localities and are great annoyances to man and animals, but also from the fact that they are active agents in the transfer of disease.
The very small insects known as "thrips" belong to the Order Physopoda., which is a very well differentiated group and has apparently no very close relatives among the insects. They are very minute, slender insects, with four wings which are also very slender and very short, perfectly transparent and practically without veins. They are fringed, however, with long delicate hairs and lie along the back of the abdomen when at rest.
Visit also Insect Identification to identify insects.