Sub-order II. CYCLORRHAPHA (families XXVI—LX); flies which escape from a puparium, formed of the indurated larval skin, through a circular orifice made by pushing off its head end (plate VI, 37).

PROBOSCIDEA—

53 (54). Antennæ (plate III, 39, 40) with a long seta or bristle.

Platypezidæ, XXVI

54 (53). Antennæ (plate III, 48) with a short seta or spine.

Part of Conopidæ, XXIX

55 (33). Arista dorsal (plate III, 27, 33, 34, 41-47, 49-55).

56 (61). O, 61 long (plate V, 18-21-1/2) extending nearly to hind margin: D without strong bristles (macrochætæ).

57 (60). Proboscis of moderate length (plate VI, 12-16) generally retracted.

58 (59). Vena spuria (plate V, 18) absent; A, II very large; O, 42 open.