290 The Ohio Journal of Science [Vol. XVII, No. 8, 



of these persisting maggots was 27; 4-?, 15 and 16 days 

 respectively, thereby completing the developmental or im- 

 mature stage as follows : 



One male on 11th November, 1916 — 27 days; one female 16th 

 of November — 32 days; one male on 15th January, 1917 — 92 

 days; one female 9th of February — 117 days; one male on 10th 

 of February — 118 days. 



The variation of from 17 to 101 days in the maggot stage, 

 and this under conditions which ordinarily hastens their 

 development is particularly noteworthy. 



Maggots of this species were taken November 10, 1916, 

 from the sheep manure pile, previously described. These 

 pupated in vials 3 days later and were placed in the laboratory 

 where they remained until February 28th, 1917, where 1 male 

 appeared after resting in puparia 107 days. 



Maggots were again taken from this same manure pile on 

 January 6th, 1917. These pupated in vials in the laboratory 

 11, 17 and 19 days later and brought forth adults in 11, 15 and 

 16 days respectively — these emerging from January 28th to 

 February 10th. 



vSome of the sheep manure taken January 6th was placed 

 in a breeding box in the cool chamber of the insectary. This 

 chamber became very hot, however, on sunny days. Adults 

 appeared in this box from 49 to 64 days after, thus emerging 

 from the 24th of February to the 10th of March. 



Lucilia sericata Meig. was also bred from maggots found on a 

 dead sparrow in the autumn, from decaying cantaloupe and 

 from guinea-pig manure. 



The above data points to the larval and pupal stages as 

 the hibernating condition for Lucilia sericata Meig. 



Lucilia caesar L. 



This species does not seem to be as common in the vicinity 

 of Columbus as does the sericata. Maggots, however, were taken 

 on the 27th of October, from the guinea-pig manure pile, 

 containing carcasses. One pupated in a vial in the laboratory 

 on the 10th of March (135 da3i^s after its removal from its 

 habitat). The male emerging 10 days afterward or on March 

 20, 1917. This remarkable period of m.ore than one-third of a 

 year in the immature stages of this fly is comparable with that 

 of the L. sericata just described. 



