. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 132 THE PERIODICAL CICADA. within the egg period of seven or eight weeks of the Cicada, and tliis accounts for its excessive multipHcation, as described by Mr. Hart- man, and ]:)robal)ly makes it wherever it occurs one of tlie most efficient agencies in keeping the Cicada in check. THE LARGER DIGGER WASl'. I have already referred to the probabiHty of the larger digger wasp (Sphecius sneciosus Dru.) nreying on belated individuals of the period- ical Cicada. That . ... ^ --^:»S3»>^'. the bulk of the brood h
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 132 THE PERIODICAL CICADA. within the egg period of seven or eight weeks of the Cicada, and tliis accounts for its excessive multipHcation, as described by Mr. Hart- man, and ]:)robal)ly makes it wherever it occurs one of tlie most efficient agencies in keeping the Cicada in check. THE LARGER DIGGER WASl'. I have already referred to the probabiHty of the larger digger wasp (Sphecius sneciosus Dru.) nreying on belated individuals of the period- ical Cicada. That . ... ^ --^:»S3»>^'. the bulk of the brood has disap- peared, however, before this wasp becomes at all abundant has been often pointed out and is not to be questioned, and it is well known that the most of its work is with the later-appearing dog-day harvest fly (Cicada tibicen L.). With the assistance of Mr. Pergande and the writer, Pro- fessor Riley worked out the natural history of this wasp in detail in its relation to the dog-day harvest fly, and published a full illus- FlG .. :.,,. ..1 oi/li>_L,aa, iviiii iuU-growii larva of latter feeding. Natural size (after Kiley).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Entomology. Washington : G. P. O.
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