. Bulletin. , reared it in 1913 from an adult P. tristis taken * An undescribed species in authors collection. 113 at Columbia, S. C, and Mr. Rees Philpott reared two of the fliesMay 3, 1915, from a single Phyllophaga beetle found two days before inthe soil at Delaware, Ohio. We have not studied all the details of the general habits and lifehistory of this species, but as far as known they agree with those ofC. thelitis, the fly being nocturnal and laying its eggs on the beetles whilethey are feeding or resting on tree foliage at night. Some of the fliesissue the same season they parasitize th
. Bulletin. , reared it in 1913 from an adult P. tristis taken * An undescribed species in authors collection. 113 at Columbia, S. C, and Mr. Rees Philpott reared two of the fliesMay 3, 1915, from a single Phyllophaga beetle found two days before inthe soil at Delaware, Ohio. We have not studied all the details of the general habits and lifehistory of this species, but as far as known they agree with those ofC. thelitis, the fly being nocturnal and laying its eggs on the beetles whilethey are feeding or resting on tree foliage at night. Some of the fliesissue the same season they parasitize the beetle, that is during July, aboutone month after puparia are observed, but this is probably due to theconditions referred to in the discussion of C. thelitis, and in a natural. Fig. 41. Eutrixa exile Coq., male. environment the life cycle is probably normally one year. In cages theflies begin to appear soon after they have been removed from the com-post heap where they are kept during the winter months, but undernormal out-of-door conditions emergence is coincident with the appear-ance of May-beetles or a little later, their tirst appearance usually beinga few days or a week after that of C. theutis. Our records show thatthe male and female beetles are about equally attacked and that fromone to eight larvae develop in a single host, the average for 183 examplesbeing two to a beetle. 114 E. exile may be distinguished in the larval and pupal stages fromother parasites of May-beetles by the characteristic posterior spiracles,illustrated in Figure 42
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
