THE POTATO TUBEE MOTH. 



47 



parasites are undoubtedly of value in limiting tlie increase of the tuber 

 moth while itworksinthetops, thus decreasing infestation of the tubers. 



Fig. 44. — Nepeira benevola: Adult female. Much enlarged. (Original.) 



A review of the parasites shows that they attack the tuber moth 

 under the followins conditions: 



On leaf-mining tuber moth. 





On storage tubers. 



' 2230^' . Zagrammosoma flavoUneatum . 







2230"^. Sympiesis stigmatipennis . 

 2230"-' and 2230'"-^ Campoplex phlhori- 











maeae. 







2230"*. Hahrobracon johannseni. 



1 2230"*. 



ITahrobrncon johannseni. 



2230"*. Oielonus shoshoneanorum. 



1 2230''\ 



Chelonus shoshoneanorum. 



• 22.30"«. Bfmvs O'ihhosus. 

 2230'^. ApuntdcsKp. 











' 2230'^". Mvroqdnlcr sp. 







2230"'^. Dihrachys clixiocampae. 



' 2230"«. 



lJil)rachys chsioatmpae . 



'2230"'^. Xepeira benevola Vdr . fusci/emoru. 







' Of doubtful importanre. 



PREDATORS. 



Predacious (iiiomios of tlio tuber motli appear ocoiiomically unim- 

 I)()rtant and will bo considorod very briefly. 



TrijjJdejjsi'fifiidiofius vSiiyaiid the* larva of f'liryfiopacdl'iforiiica Coq. 

 have on a f(!W occasions bcion noted to destroy the eggs and newly 

 hatched larva;. As both those insects prefer aphids to the tuber 

 moth, and as aphids are generally present on the potato tops, it 



