- 41 - 



In other countT-ies locusts are often infested by another genus 

 of these hair worms viz., those known as Gordius, but these are 

 aquatic save when living in the bodies of their hosts. Perhaps 

 some of the Gordii also thrive in the Argentine Republic. 



Locust Mites. 



Ver_y frequently the voladoras are infested with certain small, 

 red, tick-like creatures, or mites, and less often these same 

 parasites may be seen clinging to the legs and other parts of 

 saltonas. Different writers mention at least two distinct species 

 of these parasites that have been known to attack our locust. 



During the past year the writer has seen but few of these 

 mites and therefore has not had an opportunity to study their 

 life-historv- 



Fi^-. Ill, — Trombidium locustarLim a, i>r T..mjusI Mite; /'. ihu larva as seen 

 on locust's wini;'; cmaK-, mile; d . I'eniale, the two latter as the\' appear when 

 egfii-d estro vers— all greatly enlarged. (After Riley), 



But, if thej^ are at all similar in habits to those of allied 

 species which attack the Rocky Mountain and a few others of 

 our North American locusts, they are an important enemy 

 which at times do much to check the increase of the pest. 



The two species of the locust mites that have been described 

 as enemies of ScJiistocerca pardnciisis in this country are 

 Tyoiiibidiitm acridii pe>'ei:;riiii and rroiidjidinni clegaus. 



