18 CIRCULAR 8 4 9, U. 8. DEPT. OF AGRICULTURE 



corn near there on May 25, 1937. No other injury is known or has 

 been reported. However, the larvae of this species are easily con- 

 fused with those of Chorizagrotis auxiliaris. 



Seasonal history. — This species has a single generation annually. 

 Light-trap records for Scottsbluff showed adults to be present during 

 September and early October. The larvae taken at Chadron on Ma}~ 

 25 ceased feeding the first week in June and entered the soil. They 

 remained in their cells until the first week in August, when pupation 

 began, the adults emerging during the early part of September. 



Natural enemies. — Of 18 larvae reared from a single lot, 1 was 

 parasitized by an undetermined Hymenoptera and 1 died from an 

 unidentified disease. 



Euxoa pallipennis (Smith) 



Distribution. — Adults of Euxoa pallipennis were captured at lights 

 in Hays, Kans., and Lincoln and ScottsblufT, Nebr. They have been 

 reported from Utah by Davis and Dorst (6). Larvae were collected 

 at Bird City, Kans., and Lamar, Colo. 



Economic status. — This species is of no known economic importance. 



Food plants. — Larvae were taken in wheat and in roadside vegeta- 

 tion. 



Seasonal history. — This species appears to have but a single genera- 

 tion annually. The adults are present from late in August to early 

 in October. Larvae collected in the field on May 18, 1939, ceased 

 feeding the last week in May, and after constructing their pupal cells 

 estivated until the middle of August, when pupation began. The 

 adults emerged in September. The overwintering stage is not known, 

 but this species probably hibernates as a partly grown larva. 



Natural enemies. — No parasites were reared from the limited num- 

 ber of larvae observed, and no disease was noted. 



Euxoa detersa (Walker) 



Distribution. — Whelan (23) reports that this species is found in 

 eastern Canada, Nova Scotia, and the northern Lnited States as far 

 west as Nebraska and Colorado. Tietz (16) reports it from Penn- 

 sylvania; Dirks (7), from Maine. The writer has captured adults 

 at lights at Manhattan, Hays, and Garden City, Kans., and Lincoln 

 and ScottsblufT, Nebr. 



Economic status. — This cutworm is of considerable economic im- 

 portance locally in the sandy-soil section of Nebraska, principally in 

 Holt, Antelope, and Pierce Counties. 



Food plants. — Corn is the chief crop attacked, but the species has 

 been reported in other grasses. 



Seasonal history. — There is a single generation annually. The 

 adults are present late in August and throughout September. This 

 species probably hibernates as a partly grown larva. Larvae taken 

 late in May ceased feeding early in June, and estivated as larvae 

 within their cells. The adults emerged in August and September. 



Xatural enemies. — Of 67 larvae that were reared, 7 were parasitized 

 by unidentified Hymenoptera and 2 by unidentified Diptera. 



