Note 201 — STUDIES IN THE THEORY OF DESCENT (continued 2)

[In the most recent works dealing with this order six groups, based on the character of the imagines are recognized, viz.:—Tubulifera, Terebrantia, Pupivora, Heterogyna Fossores, and Mellifera. (See, for instance, F. P. Pascoe’s “Zoological Classification,” 2nd ed. p. 147.) Of these groups the larvæ of the Terebrantia as thus restricted are all of the caterpillar type (Tenthredinidæ and Siricidæ), whilst those of the other groups are maggot-shaped. For a description of the development of the remarkable aberrant larva of Platygaster, see Ganin in Zeit. f. wissenschaftl. Zool., vol. xix. 1869. R.M.]