. The insect book [microform] : a popular account of the bees, wasps, ants, grasshoppers, flies and other North American insects exclusive of the butterflies, moths and beetles, with full life histories, tables and bibliographies. Insectes; Insects. Tf I 'I : J ¥ < hill?' "' J w 1 =1 THH CHALCIS FLIPS (Super-family I 'lialci-ioutca.) This group of punisitic is proluMy tlii' larpest in number of species ol'iiny otthe corresponding Hymenopteroiis groups. It IS A well delineJ and well limited group structurjiiv speaking and comprises undoubtedly many thousands ot species. On
. The insect book [microform] : a popular account of the bees, wasps, ants, grasshoppers, flies and other North American insects exclusive of the butterflies, moths and beetles, with full life histories, tables and bibliographies. Insectes; Insects. Tf I 'I : J Â¥ < hill?' "' J w 1 =1 THH CHALCIS FLIPS (Super-family I 'lialci-ioutca.) This group of punisitic is proluMy tlii' larpest in number of species ol'iiny otthe corresponding Hymenopteroiis groups. It IS A well delineJ and well limited group structurjiiv speaking and comprises undoubtedly many thousands ot species. Only a small proportion ot the species have as yet been described. As a rule the insects are so small that they attract no attention from the averai^e collector and the paucity of our specific knowledge of the group possibly arises from this fact. The writer was the lirst entomologist in America to undertake the systematic study of the Chalcidoidea and he and his colleague, Mr. , have »â y had the field practically to themselves lor the past lo years. In the course of this I time, houever, we have described many of species and have learned many interesting tacts about the strange life histories and relationships with other in- sects, many more of which remain to be noted by care- ful observers. Almost all of the forms are truly parasitic, the exceptions being certain gall- making species belonging to the genus Isosoma and its allies and possibly the seed inhabiting species of the genus Megastigmus. Nowhere in nature is there a more marked example of the co- relation between structure and habits than occurs in this family. This co-relation descends to the relation between the parasites and their hosts so that it is possible for an experienced person on seeing a new species of Chalcis tly to tell precisely what kind of an insect it will be found to be parasitic upon. For example, the 56. Kig. jt;.â Pachyiieunjn micans, How. ( Author i ). Pleas
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1901
