6 



therefore, be taken into consideration when limiting the 

 distribution of this insect. Especially is this liable to be true 

 with reference to records for Ecuador and central Brazil. 



Habits. — Nothing further has been added to our knowledge 

 concerning the habits, wintering or egg-laying. Though on 

 this last mentioned topic considerable effort has been made 

 to decide whether or not each female insect deposits but a 

 single cartuclto, or several cartuchos of eggs at intervals 

 during the spring and summer months. Neither has the 

 data thus far obtained enlightened us as to whether or not a 

 partial second brood is reared in the northwest provinces 

 late in the fall — during the months of April and May. Bj^ 

 compiling the data accumulated on this point and covering 

 a period of something over three years it is found that only 

 12 records occur of egg-laying during the month of August, 

 78 records for September, 326 records for October, 116 for 

 November, 10 for December, 14 for January, 9 for February 

 and 5 for March, while for April there occurs no definite 

 record and but a single one for May. From these figures it 

 can readily be seen that egg-laying occurs chiefly in spring, 

 and for that matter mostly within 40 or 45 days with the 

 month of October as the height of the season. This fact 

 in itself would jDoint quite conclusively that the rule must 

 be but a single brood as well as a single cartucho of eggs per 

 female. The irregularity noted later in the year could be 

 readily accounted for by the supposition of retarded devel- 

 opment of the eggs in many females that had become weak- 

 ened either by disease, accident, or climatic influences during 

 winter or early spring and later recovering sufficientlj' to 

 migrate and develop their eggs. 



The late layings in the northwest provinces are as jqX, 

 hard to account for unless we are led to believe as Mr. Oli- 

 ver C. James intimates in a letter. ''From Rioja and Cata- 

 marca reliable reports of locusts depositing eggs in Febru- 

 ary and March were received. These were, doubtless, the 

 progeny of the mangas which were hatched in these locali- 

 ties at a little later jjeriod last year. ' ' 



