^ 44 



enemies, and in the fall of 1876 it destroyed on an average about 

 ten per cent, of the eggs in Missouri, Kansas, and Nebraska, 

 and in some localities a much larger percentage. It was also 

 quite common in Iowa and Minnesota, and, as we learned dur- 

 ing the past year, occurs in Colorado and Texas. It is doubt- 

 less this species which our correspondents in many cases re- 

 fer to by the general term of grubs, white Avorms, «^c, as the 

 cause of the non-hatching of eggs. '" 



This little grub or maggot is of the same general form as the 

 common meat-maggot, but, when full-grown measures not 

 more than 5 to 7 millimeters in length. They are found in the 

 cartuchos " or egg-pods of the locust either singly or in 

 numbers. 



Here in Argentina a similar insect has been ascertained to 

 exist and to be occupied in the same good work. The accom- 

 panying illustration (Fig. 11) will give the reader some idea 

 of its general appearance, although it may not be of the 

 same species. Specimens of this insect were seen b}' the 

 writer that were reared from eggs taken here at Carcaraña 

 in 18%. AVhile Mr. Oliver C. James speaks of the insect in an 

 article entitled " Locust Killers" which was printed in the 

 Review ot" the River Plate for Saturday, September oth. 1896. 



Blister or Oil Beetles. 



The •' Bicho moro " or gray blister-beetle, which is often so 

 numerous and destructive here in various parts of the Republic, 

 deserves a " passing notice " at least, when writing of the insect- 



enemies of destructive locusts. In North America it has been 

 ascertained that a number of kinds of these blister-beetles, in 



