Iteomyia salicifolia

Host: Salix sp.

Salix
Leaf gall
Spherical gall protruding from only one side of leaf

[A drawing of this gall appears on page 282, Figure 414b]

Galls are monothalamous and about 2 mm in diameter. Full-grown larvae leave the galls in late summer and spin cocoons in which they overwinter.

Range: NY

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.

Oligotrophus salicifolius, n. sp.

Salix
Leaf galls

Yellowish, truncate, greenish yellow, lipped gall, diameter 2 mm.

[Fritz et al report a higher prevalence of Iteomyia salicifolia on hybrids between Salix eriocephala and sericea than on either parent species]

Oligotrophus salicifolius

Yellow, red-spotted, flattened gall, diameter 2-3 mm.

Oligotrophus salicifolius

Salix
Leaf galls

Ovoid, yellowish, red-spotted blister gall, diameter .1 to .125 inch, most evident on under surface, gall midge, summer