A

 

Document Type

Article

Journal/Book Title/Conference

Journal of Hokkaido University of Education

Volume

18

Publication Date

9-1-1967

First Page

24

Last Page

42

Abstract

There are many publications concerning Hymenopteran corpora allata, including anatomica l descriptions, biometrical studies, and studies of endocrinological interaction with the ot her o rgans, especially with the reproductive system, or the development of worker ovaries (Hanstrom, 1939; Nabert, 1913; Palm, 1948; Williams, 1958, etc.). According to our studies, on the other hand, it has been verified that among colonies of the so-called stingless bees three types of development of worker ovaries exist under normal queen-right condition, i.e., 1) a type having well-developed worker ovaries, for example, Scaptotrigona postica, Melipona group, and others; 2) a type in which worker ovaries never develop, for example, Frieseomelitta group, Hypotrigona mullerii, Duckeola ghilianii, Partamona group, and others ; 3) a type having partially developed worker ovaries, for example, Plebeia droryana, Nannotrigona testaceicornis, and others (Sakagami et al., 1963).

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