CII E RAI IDA E These interesting little insects form a quite conspicuous element in the insect fauna of the Cranberry Lake region, especially Psyllia floccose, trimueulate on fire cherry, and carpinicola, apparently on numerous host plants, being taken in immense numbers. All the species are leaf feeders, living on the under surface of the leaves. The common gall making species occurring on hackberry trees are wanting here as the host plant does not occur.
A very striking feature is presented in the white cottony masses covering the bodies of the nymphs in P. floccosa on alder and P. 3-maculate on fire cherry. The latter form may be• counted as destructive and merits a more detailed study of life history and ecology for economic reasons.
Aphalara veaziei Patch.
Cranberry Lake, July 5, 1920; .Tune 9, 1920.
Trioza nigrilla Crawford.
This species is widely distributed and a fairly common species on willows. Cranberry Lake, Aug. 4, 1919.
Psyllia striata (Patch.) I refer here a very abundant species occurring commonly on yellow birch, but as adult found on a wide variety of plants. Nymphs with small flocculent covering have been noted on birch leaves, but I have not verified the connection. Evidently very
close to carpin ico/a. Cranberry Lake, July 2-25, 1920.
Psyllia carpinicola (Crawford).
The species occurs in great abundance and a great of I rees, but was especially plentiful as adults on yellow birch, white pine and the cherry. Barber Point and Cranberry Lake, July 8, 14 and 28, 1919; July 1920.
Psyllia floccosa Patch.
Cranberry Lake, Barber Point, Plains, Childwold and Ranger School in abundance on alder. Agrees with description of floccosa, especially in genitalia. No nymphs with flocculent covering seen on alder at camp, but these may have matured before my arrival. The Ranger School specimens were taken in alder clump on rocky hillside which was very moist during July and August. 1920.
Psyllia 3=maculata Crawford (Figs. 42 and 43).
A very abundant form on great variety of plants in adult stage. Nymphs, the flocculent form, are very abundant on 1'11111 us pevusylrailica. The adults have more or less varying shades of yellow to red on thorax (trimactdala life history notes).