Guide to the study of insects and a treatise on those injurious and beneficial to crops, for the use of colleges, farm-schools, and agriculturists . on certain Coleoptera and Hymen-optera, and even on larv?e of Phryganidce, which live in thewater. In Europe, Pimpla Fairmairii is parasitic on a spider,Clubione holosericea, according to LaboullKne. Bohemaustates that P. ovivora lives on a spider, and species of Pimplaand Hemiteles were also found in a nest of spiders, according toGravenhorst. Bouche says that Pimpla rufata devours, duringwinter and spring, the eggs of Aranea diadema, and Ratzbur
Guide to the study of insects and a treatise on those injurious and beneficial to crops, for the use of colleges, farm-schools, and agriculturists . on certain Coleoptera and Hymen-optera, and even on larv?e of Phryganidce, which live in thewater. In Europe, Pimpla Fairmairii is parasitic on a spider,Clubione holosericea, according to LaboullKne. Bohemaustates that P. ovivora lives on a spider, and species of Pimplaand Hemiteles were also found in a nest of spiders, according toGravenhorst. Bouche says that Pimpla rufata devours, duringwinter and spring, the eggs of Aranea diadema, and Ratzburggives a list of fourteen species of Ichneumons parasitic onspiders, belonging to the genera Pimpla, Pezomachus. Ptero-malus, Cryptus, Hemiteles, Microgaster, and Mesochorus. 194 Emerton informs me that he has reared a Pezomachus fromthe egg-sac of Attus, whose eggs it undoubtecllj^ devours. Theyare not even free from attacks of members of theu own family,as some smaller species are well known to prey on the cut off from communication with the external world,the Ichneumon larva breathes by means of the two principal tracheae, whichterminate in theend of the body,and are placed,according to Ger-staecker, in com-munication with astigma of its the com-plete assimilationof the liquid 123. the intestine ends in a cul de sac, as we have seen it in the larvae of Humble-beesand of Stylops, and as probably occurs in most other larvaeof similar habits, such as young gall-flies, weevils, etc., whichlive in cells and do not eat solid food. The first subfamily, the Evaniidce, are insects of singular andvery diverse form, in which the antenrse are either straight orelbowed, and thirteen to fourteen-jointed; the fore-wings have one tothree su
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
