Coleotechnites thujaella

(Kearfott, 1903)
Brown Cedar Leafminer

Sort #: 1137 | P #: 590751 | MPG #: 1832
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Larval feeding type: The larva mines the the leaves in the Fall and feeds again in the Spring. In the Spring the frass is ejected from the mine and the larva pupates in this portion of the mine. The larva and pupa are red or brown.
Larval substrate: Thuja occidentalis* (Northern White Cedar)
Phenology: Adult: 6/09 (1 record)

Comment: Similar feeding pattern to Argyresthia thuiella, but the larva is red, not green.

Status in MA (automated assessment): Restricted distribution, rare
Status in N. America: Native
MA Endangered Species Act status: None
First Year Reported: 1932
Last Year Reported: 2020

Distribution by County: Franklin, Middlesex, Norfolk
Number of Records: 6