. Bulletin - United States National Museum. Science. COLLECTING AND PRESERVING INSECTS BANKS. 91). Fig. 155.—One of the Pompilid wasps. Priocnemis. SPECIAL KINDS OF COLLECTING. It is of great interest to any observer to find out what occurs in a certain place or under certain conditions. For example, the insects that are associated with ants, that are to be reared from fungi, that occur along the seashore or in caves, or to be taken from a certain kind of flower. This group or eco- logical collecting is of in- creasing biological interest, since it shows what insects are associated with each o
. Bulletin - United States National Museum. Science. COLLECTING AND PRESERVING INSECTS BANKS. 91). Fig. 155.—One of the Pompilid wasps. Priocnemis. SPECIAL KINDS OF COLLECTING. It is of great interest to any observer to find out what occurs in a certain place or under certain conditions. For example, the insects that are associated with ants, that are to be reared from fungi, that occur along the seashore or in caves, or to be taken from a certain kind of flower. This group or eco- logical collecting is of in- creasing biological interest, since it shows what insects are associated with each other, compete with each other, and may influence each other's life. Many prominent biological ques- tions are opened by this collecting, such as isolation of allied species. Some of the principal lines of this kind of collecting arc noted below. All specimens collected under like surroundings should bear a label indicating the fact. Flowers.—It will soon be noted by any one observing insects that certain species prefer certain flowers. This is especially notice- able among bees, but many Diptera (fig. 156) also show such preference. Other insects prefer flowers of a certain color. By watching certain flowers year after year one will pick up many rare forms that would not have been captured by desul- tory collecting, and at the same time gather many facts about habits and occurrence of insects that are as yet far too little known to entomologists. For taking insects from flowers one should not use a large or heavy net. It is apt to break the blossoms so that they will attract but few insects on following days, and a large net is apt to frighten away other insects 88552—Bull. G7—09 8. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States.
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