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Document Type

Research

Abstract

The family Tachinidae is one of the most important families of flies. Well over 1500 species are known for our continent and more than 5000 species have been named for the entire world. Their chief value to man lies in their parasitic habits. Many of the species are highly destructive to injurious insects, especially the caterpillars of the Lepidoptera. Their usual procedure is to search out a prospective host and attach one or more eggs to the surface, often in some place which the victim cannot reach with its jaws. The maggot upon hatching immediately enters its host and lives in the open blood sinuses where the nutriment is rich but no vital parts of the host are injured. The maggots may leave their host when they have completed their growth and pupate in the ground or other protected place, but in the case of many species remain within the host to pupate and later emerge as an adult. The host caterpillar frequently pupates before the maggot has completed its growth. That makes but little difference to the tachinid larva which then feeds upon the contents of the pupa and in turn pupates within it. Presently, then, instead of a moth or butterfly emerging from the pupal case one or more tachinid flies appear.

Publication Date

1949

Journal Title

Proceedings of the Iowa Academy of Science

Volume

56

Issue

1

First Page

363

Last Page

365

Copyright

© Copyright 1949 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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