116 PAPERS ON CEREAL AND FORAGE INSECTS. 
which is bluntly oval, mottled with brown, and measures 6.53 mm. 
in length. 
On August 27 a dead larva of the alfalfa looper with a mass of 
hymenopterous cocoons fastened to it (Pl. XI, fig. 1) was found 
in an alfalfa field in Pullman, Wash. 
The cocoons were enveloped in a loose, 
white, silken ball 18 mm. in diameter. 
On August 29, 34 specimens of A panteles 
hyslopi Vier. (fig. 49) emerged from this 
mass. 
Ameloctonus n. sp., determined by Mr. 
H. L. Viereck, was reared from the larva 
of this moth at Salt Lake City, Utah, in 
1911, by Mr. T. H. Parks, of this office. 
Fie. 48.—-Cocoons of alfalfa looper "The cocoon of the parasite was spun on 
parasites: a, Microplitis sp.; r 3 
b, Sargaritis websteri; c, Micro. August 17,and the adult parasite emerged 
plitis Ciera. mnie gen > on August 93. 
ea eee One of the alfalfa looper larve in the 
insectary rearing cages started to spin a cocoon on January 11, 1909. 
On examining the cocoon two days later it was found to contain 
puparia of Plagia americana Van der Wulp, one entirely and one 
partly within the dried larval skin. On July 23 one adult emerged, 

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a — 

Fic, 49.—Apanteles hyslopi, a hymenopterous parasite of the alfalfa looper. Greatly 
enlarged. (Original.) 
and on either July 24 or 25 another emerged (fig. 50). Several more 
of these flies were reared, and the number that would emerge from a 
larva was always directly associated with the size of the larva. A 
very small larva in our cages produced one fly, a medium-sized larva 
two, and a full-grown larva produced five of these parasites. 
