. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 1913 ENTOMOLOGICAL SOCIETY. 105 five per cent., and not every apple that had been punctured was sufficiently deformed to consider it a cull though very few could be classed as No. 1. I regret that descriptions of nymphs were not made with sufficient care to be reliable, and that we have not yet had a chance to make a study of the life history of each species. So far as I can see, however, from the fact that the attacking nymphs are very small when the apples are just forming and that both nubilus a
. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 1913 ENTOMOLOGICAL SOCIETY. 105 five per cent., and not every apple that had been punctured was sufficiently deformed to consider it a cull though very few could be classed as No. 1. I regret that descriptions of nymphs were not made with sufficient care to be reliable, and that we have not yet had a chance to make a study of the life history of each species. So far as I can see, however, from the fact that the attacking nymphs are very small when the apples are just forming and that both nubilus and colon seem to keep pace with mendax in development, the life history of the former two will probably closely correspond to that of Lygidea mendax and Heterocordylus malinus as given by Crosby. It may perhaps be of interest to note that Mr. Van Duzee states that he usually finds Neurocolpus nubilus on Sumach and Paracalacoris colon on Bladder-. Fig. 41.—Tips of tender shoots killed by young plant bugs. Nut. I examined carefully sumachs about half a mile from the orchard, but could find no Capsids on any part of them. There were no Bladder-Nut bushes near. I have taken specimens of Heterocordylus malinus on a couple of occasions in the vicinity of Guelph, but have not yet been able to prove that they cause any damage to apples in Ontario. Professor Parrot has found that another Capsid, Lygus invitus, does considerable damage to pears. I have not yet hap- pened to observe any injury from it in this Province, though probably it is doing some. Almost every place I go, and especially at Institute meetings deformed apples and pears are brought in by farmers who are anxious to know the cause. From the nature of these deformities I feel that a large field for investigation is etill open to entomologists, though of course a good many deformities come under the province of the plant pathologist equally as much as under that of the ento- Please note that these images are ex
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