. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 10.— Triphleps insMiosus, an important enemy of the red spider: Adult. Muchi enlarged. (McGregor). (1914); and Parker (1913) states tliat a closely allied species, ticolor, WSLS tlie most numerous red-spider enemy in the hop fields, but that no controlling effect could be detected. This predator, coming upon a red spider like a flash, thrusts its sharp proboscis through the mite's back and siphons out the body contents. In the case of one bug, the first mite was drained in about five minutes, but each succ
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 10.— Triphleps insMiosus, an important enemy of the red spider: Adult. Muchi enlarged. (McGregor). (1914); and Parker (1913) states tliat a closely allied species, ticolor, WSLS tlie most numerous red-spider enemy in the hop fields, but that no controlling effect could be detected. This predator, coming upon a red spider like a flash, thrusts its sharp proboscis through the mite's back and siphons out the body contents. In the case of one bug, the first mite was drained in about five minutes, but each succeeding meal was of shorter dui'ation, so that the average time rec[uired for each meal was found to be about three minutes. The ac- tions of the nymph (fig. 11) are similar. Both adults and nymphs feed upon the mites in all stages from egg to adult, but the Triphleps adult will not ordinarily consume mite eggs unless other food is scarce. The operation of draining an egg requires about two minutes. These bugs pass the winter in the adult stage and usually become active some time in April, although they have been seen as early as the middle of March. Triphleps becomes ex- tremely abundant by the first of July, and assists greatly in the reduction of the red spiders. Although it seeks hibernation toward the end of October, in- dividuals are commonly seen some years as late as the middle of this month. By referring to Tables VIII and IX it will be seen that 8 in- dividuals collected as various of the nymph drained 1,856 red spiders in 57 feeding days. The average daily consumption of the nymph was mites, that of the adult was , and the daily average for all individuals was. Fir;. II. • Triphleps ifuidifjsut: X ymph. larged. (McGregor.) Greully en-. 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 origin
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