THE POTATO TUBER MOTH. 
43 
APANTELES SP. 1 
This small active parasite (figs. 36-38) was not observed until 
1914, and seems quite scarce except in the vicinity of Pasadena. 
The half -grown leaf -mining tuber- 
moth larvse are attacked. When 
the parasite has discovered a leaf 
mine, it cautiously examines it until 
it has located the position of the tu- 
ber-moth larva. The parasite then 
quickly inserts its ovipositor in the 
mine. In case it strikes the larva, 
it oviposits; otherwise it quickly 
withdraws its ovipositor, inserting 
it again in a new place. This is 
repeated until the larva is parasi- 
tized, although the difficulty in lo- 
cating the larva may require a sec- 
ond examination of the mine. 
Should the parasite discover a larva, 
however, it seldom leaves until it 
has been successful in oviposition. 
This Apanteles is a most promis- 
ing parasite. The record of an average winter life cycle follows: 
Fig. 34. — Bassus gibbosus: 
Mature larva. Much 
enlarged. (Original.) 
Fig. 35.— B assus gib- 
b o s us : Pupa. 
Much enlarged. 
(Original.) 
Fig. 36.— Apanteles sp. (Chttn. No. 2230<"), a parasite of the potato tuber moth: 
Adult female. Much enlarged. (Original.) 
1915. 
January 25. — Tuber-moth larvae parasitized by Apanteles sp. 
March 3.— 1 adult Apanteles sp. issued. (Female.) 
March 5. — 2 adult Apanteles sp. issued. (Males.) 
March 6. — 1 adult Apanteles sp. issued. (Male.) 
Length of life cycle 37 days at average mean temperature of 53° F. 
i Chittenden No. 2230°*. 
