_Incongruences in other Orders of Insects_, p. 481.
Hymenoptera. The imagines only possess ordinal characters, 481. Double
incongruence: different distance and different group-formation,
483. Diptera, 488. The larvæ form two types depending on different
modes of life, 489. The similarity of the grub-like larvæ of Diptera
and Hymenoptera depends upon convergence, 494. These data again
furnish strong arguments against a phyletic vital force, 496. The
tribe _Aphaniptera_, 498. Results furnished by the form-relationship
of Diptera and Hymenoptera, 499. Difference between typical and
non-typical parts transient, 501.