. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 28 OUR SHADE TREES AND THEIR DEFOLIATORS. primary but are probably secondary, are reared from the bags. Three of these are Ichneumouids, viz: (1) Phnpla conquisitor Say (Fig. 11); (2) £impla inquisitor Say, aud (3) Hcmiteles thyridopterigis Eiley (Fig. 12).. Fir,. 12.—Hemitelcs thyridopterigis: «, male: b. feninlo; c, sack of baj; worm cut open, sbowiuij cocoous of parasite, natural size. Of these, the last-named is most abundantly bred, and we have always considered it as the most important parasite of t
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 28 OUR SHADE TREES AND THEIR DEFOLIATORS. primary but are probably secondary, are reared from the bags. Three of these are Ichneumouids, viz: (1) Phnpla conquisitor Say (Fig. 11); (2) £impla inquisitor Say, aud (3) Hcmiteles thyridopterigis Eiley (Fig. 12).. Fir,. 12.—Hemitelcs thyridopterigis: «, male: b. feninlo; c, sack of baj; worm cut open, sbowiuij cocoous of parasite, natural size. Of these, the last-named is most abundantly bred, and we have always considered it as the most important parasite of the Bag-worm. The past season, however, we have ascertained that three species of the genus Hemiteles, viz: H. utilis, and two undescribed species, are un- questionably secondary parasites, and this renders it quite likely that H. thyridopterigis xwdj also be secondary, or, in other words, a parasite of one of the true parasites of the Bag-worm. It is a question, how- ever, which only the most careful study, with abundant material, can decide, as the law of unity of habit in the same genus finds many exce])- tious in insect life. The other parasites are as follows: (4) Chalcis ovata Say. This parasite is a very general feeder on Lepidopterous larvie, and we have bred it from seven widely different species. (5) iSpilochalcis mari(c (Riley). This species, while parasitic on T]iyridoi)teryx, is more partial to the large silk-spinning caterpillars, we have reared it from the cocoons of all of our large native Silk-woiiiis. (6) Pteromalns sp. This undescribed Ohalcid is found very abundantly in the Bags, bat maj' be a secondary parasite. (7) Dinocarsis thyridopterygis Ashmead. This parasite was bred from the Bags in Florida by Mr. William H. Ashmead, who believes it to be parasitic on the eggs. (8) Tachina sp. We have bred a large bluish Tachiuid from the Bags. Its eggs are commonly attached to the Bags externally, near the neck, and the young larviX', on hatching, work their
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