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TRICHOGRAMMA PRETIOSA, RILEY: COLOUR VARIATION IN THE ADULT, WITH DESCRIPTION OF A NEW VARIETY

Published online by Cambridge University Press:  31 May 2012

A. Arsene Girault
A. Arsene Girault
Affiliation:
Washington, D. C.
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Extract

In the original description of this insect, * Dr.Riley says that on account of its uniform pale yellow colour it is easily distinguished from Trichogramma minutum, Riley, which is black. Unfortunately, this does not hold.† Out of the hundreds of specimens of pretiosa reared during the enire season of 1904, at Paris, Texas, from the eggs of Heliothis obsoleta, Fabricius, there appeared from a lot of host eggs on Sept. 20th a number of dark individuals, which could easily have been mistaken for a distinct species.

Type
Articles
Information
The Canadian Entomologist , Volume 38 , Issue 3 , March 1906 , pp. 81 - 82
Copyright
Copyright © Entomological Society of Canada 1906

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References

* Canadian Ent., 1879, XI., pp 161–162.

† Dyar, 1893, Canadian Ent., XXV., p. 256, mentioned that the males of pretiosa are often black on the dorsum of the abdomen.