. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE CONCHUELA. 63 history and habits treated of in connection with the description of the species. The following table summarizes the data on parasitism by Teleno- 7nus asJimeadi obtained during the season of 1905: Table XXX.—Parasitism of eggs of the conchuela by Telenomus ashmeadi in 1905. When collected. Locality. Egg-batches. Number collected Number parasit- ized. Eggs. Number. Per cent from which parasite emerged. Per cent from, which bugs hatched. 1905. July 7 July 12 July 17 August 11-12. September 12. T l
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE CONCHUELA. 63 history and habits treated of in connection with the description of the species. The following table summarizes the data on parasitism by Teleno- 7nus asJimeadi obtained during the season of 1905: Table XXX.—Parasitism of eggs of the conchuela by Telenomus ashmeadi in 1905. When collected. Locality. Egg-batches. Number collected Number parasit- ized. Eggs. Number. Per cent from which parasite emerged. Per cent from, which bugs hatched. 1905. July 7 July 12 July 17 August 11-12. September 12. T lah ualilo, D uran go, Mexico do do Barstow, Tex do 75 229 181 246 49 22 54 Summary. 36 1,221 a Fifty-one per cent contained parasites; 25 per cent failed to emerge. As stated by the writer in previous publications, the percentage of eggs from which adult parasites emerge does not indicate necessarily the number of bug eggs which are ac- tually prevented from hatching by these beneficial in- sects. Both in the laboratory and in the field many par- asites reach matu- rity, but for some unknown reason fail to emerge. In many cases the parasites make holes with their mandibles in the egg-shells of the bugs in which they are incased, nearly large enough to permit of escape, and then die, apparently becoming exhausted by their efforts. Other eggs in parasitized batches fail to hatch, or produce adult parasites, containing nothing but a shriveled, brownish, and structureless mass. The failure of such eggs to produce nymphs seems to be usually due to parasitism. Possibly in such cases the larva of the parasite died soon after having accomplished the destruction of the host egg. The table leaves unexplained the failure to hatch of about 30 per cent of. Fig. 8.— Telenomus ashmeadi, an important egg parasite of Pentatoma ligata: Adult female and antenna of male. Highly magnified. (Author's illustration.). Please note that these images are extracted from scanned page images t
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