252 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 5 



from others, were stripped, there is reason for suspecting that they 

 must have been present the previous summer. 



Plant lice of many species were also unusually prevalent during the 

 early part of the season but later became greatly reduced through 

 their usual predaceous and parasitical enemies. 



From a stockman's point of view an interesting event was an exten- 

 sive outbreak of the well-known fungous disease, Empusa muscce, during 

 June and early July. Strangely enough only the smaller flies were 

 attacked, but these included the Hornfly which was so severely in- 

 fected that it was of little annoyance to cattle, though promising a 

 severe outbreak early in the season. 



I may mention here that careful observations with both this and 

 the locust fungus have led me to believe that cold — with possibly lack 

 of sunlight, is the chief factor in the encouragement of these diseases, 

 and that wet "muggy" weather has little to do with their spread. A 

 moment's thought will bring to mind the fact that there is but one 

 period of the year when Empusa muscce is nearly always present, 

 namely late autumn when the temperature is becoming low. In 

 1911 low temperatures were invariably followed by an increased 

 number of deaths from E. grylli and so it was with E. muscce and flies.^ 



Among other troublesome insects may be mentioned an unusually 

 severe outbreak of mosquitoes covering most of the province, also 

 an abnormal number of stable flies, Stomoxys calcitrans, and Horse 

 bot flies, Gastrophilus equi. 



THE COTTON S QUARE- WEEVIL OF PERU AND ITS 

 PARASITES 



By Charles H. T. Townsend, Piura, Peru 



At the 1910 meeting of the Association of Economic Entomologists, 

 a paper by the writer was presented announcing the discovery of this 

 new cotton pest of the boll-weevil class and giving such notes upon it 

 as had been possible of accumulation within two months after first 

 making its acquaintance. The article appeared in the April, 1911, 

 issue of the Journal of Economic Entomology. The present article 

 gives fuller information concerning it and its parasites, being such 

 additional facts as have come to light during the past year. 



Mr. W. Dwight Pierce has examined specimens of the weevil and 

 states that it may be called Anthonomus vestitus, the description by 



il am indebted to Mr. H. T. Glissow, Dominion Botanist, for the determination 

 of both these fungi. 



