. Circular. Insect pests; Insect pests. 11 bug," is illustrated at figure 0. Other natural enemies are robber flies,'' spiders, and a tachina fly.'' This last develops within the body of the potato beetle larva and has been observed so abundant in potato fields that its buzzing resembled the noise made by the SAvarm- ing of bees. Wasps of some species attack the larva\ and the rust- red social wasp '^ has been seen carrying them to provision its nest. Not infrequently the beetle is found partl}^ covered by dull, yellowish, rounded mites. These are external parasites-' and help somewhat in
. Circular. Insect pests; Insect pests. 11 bug," is illustrated at figure 0. Other natural enemies are robber flies,'' spiders, and a tachina fly.'' This last develops within the body of the potato beetle larva and has been observed so abundant in potato fields that its buzzing resembled the noise made by the SAvarm- ing of bees. Wasps of some species attack the larva\ and the rust- red social wasp '^ has been seen carrying them to provision its nest. Not infrequently the beetle is found partl}^ covered by dull, yellowish, rounded mites. These are external parasites-' and help somewhat in reducing their hosts. A species of daddy-long-legs is also a natural enemy.'' Other predatory insects include a tiger beetle {Tetracha virginica L.) and two rove-beetles (Flrilontht/s apicalis Say and Quedius inolo- chinus Grav.). Most of the species listed above have been recorded by Iviley, but many have also been observed independently by others, and correspondents of this Bureau fre- quently call atten- tion to the com- moner forms. Thus far only in- sect foes of the po- tato beetle h a v e been discussed, but certain mammals, birds, amphibians or batrachians, and reptiles are well- known enemies. One of the most im- portant of the birds is the rose-breasted grosbeak, whose services as an enemy of this beetle have been little appreciated until comi:)aratively recent times. The bobwhite or quail» a The soldier-bugs include Podisus maculiventris Say [spinostts^. P. cynicus Say, the bordered soldier-bug (Stirctrus (inchora<jo Fab., Perillus circumciiictus Stal., P. claudits Say, Milyas ductus Fab., and Siiira diadcma Fab. These com- monly attack the larval potato beetle. Nezani hilaris Say and Euschistus ra- Beauv. are said to have the same habit, but can not be important enemies, as they are naturally herbivorous. ^ Proctacanthus niilbertii Muo(i. c Phorocera (LydeUa) doryphonr RUey. ^ PoUstes ruhiginosns Lep. P. pallipes Lep. is said to have the same habit. e
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1904
