In the photo above -- the common netspinner Arctopsyche grandis from the Blackfoot River near Missoula, Montana. The genus Arctopsyche does occur in the East, but I've not yet found it in our streams.
III. Trichoptera: Annulipalpia (continuation)
Hydropsychidae (Common netspinners)
1. Ceratopsyche alhedra. Size: not given by Beaty; Season: Summer
2. Ceratopsyche bronta. Size: not given by Beaty; Season: Summer.
3. Ceratopsyche morosa, morosa form. Size: 14 mm; Season: Summer.
4. Ceratopsyche morosa, bifida form. Size: 14mm; Season: Fall.
5. Ceratopsyche slossonae. Size: 16 mm; Season: Summer.
6. Ceratopsyche sparna. Size: not given by Beaty; Season: Summer.
7. Cheumatopsyche. Size: up to 13 mm; Season: Summer.
8. Diplectrona modesta. Size: 15 mm; Season: Winter into Spring.
9. Hydropsyche betteni. Size: 16 mm; Season: Spring and Summer.
10. Hydropsyche rossi. size not given by Beaty; Season: Summer.
11. Hydropsyche venularis. Size: size not given by Beaty; Season: Summer.
12. Macrostemum. Size: not given by Beaty -- large; Season: Summer into Fall.
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