Pyralidas 



The insect occurs from Canada and New England in the North 

 to the Potomac and the Ohio in the South. 



(4) Crambus trisectus Walker, Plate XLVIII, Fig. 20, ? . 



Syn. inierniinellus Walker ; exsiccatus Zeller ; biliturellns Zeller. 



This is a very common and widely distributed species, rang- 

 ing from the Atlantic to the Pacific through more temperate 



latitudes. 



Genus DIATRiEA Guilding 



(1) Diatraea saccharalis Fabricius. (The Larger Corn-stalk 

 Borer.) 



Syn. leucaniellus Walker; lineosellus Walker; obliteratellus Zeller; crambi- 

 doides Grote. 



As early as the year 1828 the attention of the world was called 

 to the damage inflicted upon the sugar-cane in the West Indies 

 by the larva of a lepidopterous insect. The author of the paper 

 in which it was described was the Rev. Lansdown Guilding, who 

 was awarded a gold medal by the Society of Arts for his account 

 of the insect. About thirty years later, attention was called to 

 the ravages of 

 a similar insect 

 in the island of 

 Mauritius, into 

 which it had 

 been intro- 

 duced. From 

 the West In- 

 dies the insect 

 was transport- 

 ed to Louisi- 

 ana, and a 

 study of its 

 pernicious 

 habits was ac- 

 curately made 

 intheyean88i 

 by Dr. L. O. 

 Howard of the 



United States Department of Agriculture. It had been known in 

 Louisiana as a pest since 1855. 



403 



3 



D. saccharalis. 



b, c, varieties of larva, en- 



larged ; d, third thoracic segment ; e, eighth abdominal seg- 

 ment ; /, abdominal segment from side ; g, same from above, 

 enlarged. (After Howard, "Insect Life," Vol. IV, p. 101.) 



