THE POTATO TUBER MOTH. 
47 
parasites are undoubtedly of value in limiting the increase of the tuber 
moth while itworksinthe tops, thus decreasing infestation of the tubers. 
Fig. 44. — Nepeira bcncvola: Adult female. Much enlarged. (Original.) 
A review of the parasites shows that they attack the tuber moth 
under the following conditions: 
On leaf-mining tuber moth. 
On storage tubers. 
] 2230 01 . Zagrammosoma flavolineatum. 
2230 02 . Sympiesis stigmatipennis. 
2230 0:5 and 2230 013 . Campoplex phlhori- 
maeae. 
2230 04 . Habrobracon johannseni. 
1 2230 04 . 
Ha bro bracon johan nsev i . 
2230 05 . Chelonus shoshoneaaorum. 
1 2230°'. 
Chelonus shoshoneanorum. 
1 2230 06 . Bassus gibbosus. 
2230 07 . Apanteles sp. 
1 2230 08 . Mierogaster sp. 
2230 09 . Dibrachys clisiocampae . 
1 2230 09 . 
Dibrachys clisiocampae. 
1 2230 012 . Nepeira benevolo, var . fuscifemora. 
1 Of doubtful importance. 
PREDATORS. 
Predacious enemies of the tuber moth appear economically unim- 
portant and will be considered very briefly. 
TrijjJdeps insidiosus Say and the larva of Chrysopa calif ornica Coq. 
have on a few occasions been noted to destroy the eggs and newly 
hatched larvae. As both these insects prefer aphids to the tuber 
moth, and as aphids are generally present on the potato tops, it 
