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



insect became reversed in some way, so that when the anterior 

 end of the puparum was pushed off the apex of the abdomen 

 was revealed instead of the head. These flies invariably died 

 in this condition. Although only a small number behaved in 

 this way, it may have some significance in nature. 



As for the hibernation of this species the dates of collection 

 give partial evidence in favor of the immature stages. 



Calliphora erythrocephala Meig. 



The large bluebottle was taken in the insectary until the 

 8th of December, 1916, collected outside on the south and west 

 walls of the animal house during a brief warm period on the 

 6th of January and again in a meat trap on the 31st of March. 

 Among those taken on the 6th of January there was one whose 

 wings were not quite entirely expanded and its ptilinum still 

 extended. On the 8th of December, 1916, eggs of this species 

 were taken in the insectary from the cloth sleeve of a breeding 

 box containing fish. These hatched the next day after their 

 transfer to the fish, December 9th. Adults emerged in the 

 insectary from 26 to 28 days (Jan. 5, 1917) later. 



A puparium taken on the 6th of January, 1917, from the 

 guinea pig manure pile containing carcasses was transferred 

 to a breeding vial in the laboratory where a female emerged in 

 38 days (Feb. 13, 1917). 



A maggot taken on the 6th of January from wet earth 

 2 inches deep and 13^ feet southwest of the sheep manure pile 

 produced an adult female in 24 days (February 24, 1917). 



The adult distribution and the occurrence of the living 

 maggots and puparia indicate the immature stages as the 

 hibernating forms. 



Calliphora vomitoria. L. 



This bluebottle was not found as adult in early winter, but 

 was collected in a meat trap on the 31st of March, 1917. On 

 January 31st, 1917, in the earth l^^ feet southwest of sheep 

 manure pile a maggot of this species was taken, then placed 

 in a breeding vial in the laboratory where an adult female 

 emerged on the 24th of February. 



As for hibernation then this species resembles the Calliphora 

 previously noted. 



