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A 2.3 kg partially ossified fibroma developed apparently within a 4-1/2 month period near a tag inserted in the right ear of a 5-1/2 year old white-tailed doe (Odecoileus virginianus). This growth caused an abnormal head carriage, disturbed feeding and resulted in emaciation. Secondary partially ossified fibromas developed at the left ear tag and in the right external acoustic meatus. The latter fibroma penterated the tympanic membrane. The puncture wounds in the ears associated with the aluminum tags probably provided sites for virus infection and subsequent fibromatosis.

Chaoborus larvae were collected from the riverine drift of theMwenda River during the 1972/3 rainy season . Large numbers of larvae were found in the early stages of flow following the 1972 dry season, fewer were found ten days later .Larvae which reached the lake in this way appeared to show no ill effects . Possible mortality arising prior to reaching the sampling point was doubtful since no dead larvae or parts were found in the material collected .

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