ABSTRACT
After four years’ experimental work on parthenogenesis in saw-flies, the writer proposes to recount certain of the results in a series of papers under the above general title, and in doing so is desirous of designating as the first study of the series a former contribution to this Journal (Peacock, 1924). Hence, although this is the first time the general title has been used, the following paper is really the second study.
The question of the homologies of these parts is being investigated by dissection and microtomy on this and other species. The results, to date, unless the conditions vary considerably in different species, do not corroborate the interpretation for the genus Cimbex in Enslin’s “Die Blatt und Holzwespen (Tenthredinoidea),” p. 109 of Schröder’s Die Insekten Mitteleuropas inbesondere Deutchlands, Bd. iii. What Enslin names the “begattungstache” or “bursa copulatrix” and “kittdrüsen,” I take to be the “gland reservoir” and “accessory glands” respectively. The “kittdrüsen” are stated to open into the ends of the oviducts but the accessory glands certainly open into the reservoir. (See also under “Corrections “at end of this paper.)
In a previous paper (Peacock, 1924) such forms were discussed. Of the remainder, one forms the subject of the contribution and another (P. pallipes), from the writer’s experiments, will be described in a subsequent paper in which reference will also be made to the others.
Of the special dorsal meta-thoracic areas in both male and female saw-flies known as the cenchri, I am informed by the kindness of the Rev. F. D. Morice and Dr H. Eltringham, who cut sections of them, that no conclusions were obtained.
