6 ENTOMOLOGICAL NEWS [xxxii, '21 



While an infested field is likely to contain several species, 

 there will be occasional areas containing a large majority of 

 specimens of a single species, which constitutes the principal 

 pest of that immediate locality. Hence collections made on 

 July 31 at Ford, Kansas, around newly stacked wheat in up- 

 land sandy loam, furnished practically all adults of Eleodes 

 opaca Say, whereas collections made at Dodge City, Kansas, 

 15 miles away, three days later, under the same general con- 

 ditions, furnished practically all adults of Eleodes obsolete 

 Say. Again collections made on July 22 at Plains, Kansas, 

 from beneath wheat shocks in an upland field recently in native 

 sod, were nearly all adults of Eleodes sutitralis Say, whereas 

 collections made at Liberal, Kansas, 20 miles distant, two days 

 later, under the same general conditions, furnished practically 

 all adults of Eleodes opaca Say. The complexity of distribu- 

 tion points to the necessity for more careful study of the dif- 

 ferent species of similar habits from a greater number of col- 

 lections made over more extended and diverse territory before 

 deductions as to control should be considered absolutely trust- 

 worthy. 



While the scope of this paper does not include a discussion 

 in detail of prevention and control, it is believed that a study 

 of the factors as outlined, affecting the distribution of these 

 pests in relation to possible control measures, will indicate that 

 a .carefully worked out system of crop rotation will prove to be 

 one of the best measures to be advocated. However, the keep^ 

 ing down of weeds, and destruction of all debris, especially 

 dead and decaying vegetable matter upon or near to infested 

 tracts, together with late winter or early spring plowing doubt- 

 less also will prove to be of much value. 



A New Pterophorus (Lepid.). 



By W r . S. WRIGHT, San Diego, California. 



Pterophorus fieldi, n. sp. 



Expanse 21 to 26 mm. 



Palpi, front and vertex mottled light brown and white; antennae 

 whitish with very fine brown annulations. 



Anterior part of thorax but?, this color spreading out into the base 



