. Circular. Insect pests; Insect pests. THE RED SPIDER ON COTTONi 9. Fig —Triphleps iiisidiosu'^ in impoitant enemy of the red spider. Much enlarged. (Original.) the body contents. The first victim observed was '' drained" in about five minutes, but each succeeding meal was of shorter duration as the appetite became satisfied. The actions of the nymph (fig. 5) are similar, but the in- dividuals observed were seen only to destroy eggs of the spider. In this operation the pro- boscis was not inserted far into the ovum, and two minutes sufficed for draining an egg. A species of Chry- sopa or
. Circular. Insect pests; Insect pests. THE RED SPIDER ON COTTONi 9. Fig —Triphleps iiisidiosu'^ in impoitant enemy of the red spider. Much enlarged. (Original.) the body contents. The first victim observed was '' drained" in about five minutes, but each succeeding meal was of shorter duration as the appetite became satisfied. The actions of the nymph (fig. 5) are similar, but the in- dividuals observed were seen only to destroy eggs of the spider. In this operation the pro- boscis was not inserted far into the ovum, and two minutes sufficed for draining an egg. A species of Chry- sopa or lace-winged fly was s-een abundantly throughout most of the summer, the larva of which is doubtless very active in reducing the pest. Two species of thrips, Euthrips fuscus Hinds and E. occidentaUs Pergande, have been determined this season from cotton. They are commonly found throughout the season about red spider colonies, and may be very in- strimiental in spider destruc- tion. Scolothrips sexmacnlata Pergande has been recorded as an enemy of the red spider by Pergande and by Duffy. Lady-beetle larvfe and adults of several species were com- monly seen on infested loaves. These were usually either Coccinella 9-notata Hbst. or Ilippodamia convergens Gucr., but a small black species, {ScyTunus) Steth/)rus punrtum Lee, was occasionally observed. The larger beetles were prob- ably more intent upon cotton aphides, but the last-mentioned species, although late in appearing and not very numerous, seems to be more restricted to the cotton mite than are other 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, D. C. : The Bureau
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1904
