The gall's range is computed from the range of all hosts that the gall occurs on. In some cases we have evidence that the gall does not occur across the full range of the hosts and we will remove these places from the range. For undescribed species we will show the expected range based on hosts plus where the galls have been observed.
Created Feb 4, 2026 1:47 PM UTC
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Last updated Feb 4, 2026 1:47 PM UTC
68th report of the State Entomologist on injurious and other insects of the State of New York
EP Felt
(1914)
Oligotrophus salicifolius
Galls on Salix humilis, July 12. Same gall on Salix, September 22.
The irregular, yellowish, red-spotted galls of this species on the leaves of Salix humilis were taken at Karner September 7, 1909, adults being reared in March and April of the following year. The deep orange larvae appear to desert the galls in late fall, spinning oval, yellowish cocoons attached to any hard substance such as a leaf. The gall is very similar to that of O. capreae Winn. and the adults are evidently closely allied though separable in color characteristics.
Gall. Length 2 to 3 mm, irregular, ovoid, monothalamous, yellowish, red-spotted and usually most evident on the under surface of the leaves of Salix humilis.
