. Annals. Entomology. 174 Annals Entomological Society of America [Vol. XV, A brief account of a typical instance of hatching follows: The embryo began a series of movements calculated to pull the tip of the abdomen towards the posterior pole of the egg. This region became crowded and the embryo pushed upwards and outwards slowly. The upward movement was rather quick and with some effort, while the downward one appeared to be a slipping back to its previous position. Along with these movements, there was some outward nrp-^'^iirp brought tn hear. Fig. 4. An egg mass of Chaiiliodes pectinicornis
. Annals. Entomology. 174 Annals Entomological Society of America [Vol. XV, A brief account of a typical instance of hatching follows: The embryo began a series of movements calculated to pull the tip of the abdomen towards the posterior pole of the egg. This region became crowded and the embryo pushed upwards and outwards slowly. The upward movement was rather quick and with some effort, while the downward one appeared to be a slipping back to its previous position. Along with these movements, there was some outward nrp-^'^iirp brought tn hear. Fig. 4. An egg mass of Chaiiliodes pectinicornis halchmg (Photo bj' H. S. Barber, 1912). on the head region which culminated in the penetration of the chorion by the upper lobe of the burster. It was later observed that it is frequently difficult to ascertain if it has cut through the chorion or whether it is merely closely appressed. In this case, two whitish triangular areas appeared on each side of the burster, their bases next to it. The writer interpreted these as air bubbles beneath the chorion, the edges of which had been raised up in the cutting process. As the embryo con- tinued the upward pressure, the burster was pushed through. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Entomological Society of America. Baltimore [etc. ]
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