Leptalia macilenta (Mannerheim, 1853)

macilenta (Mannerheim, 1853: 253)
     frankenhaeuseri Mannerheim, 1853
     fuscicollis LeConte, 1857

Distribution

Ranges in the Pacific Northwest from Alaska southward along the Cascade and Coastal ranges to Central California. A single dot on Linsley and Chemsak's (1972) distribution map (Fig. 32) apparently represents an isolated population in Montana.

Notes on Biology

The host plants recorded for Leptalia macilenta are Alnus spp., Umbellularia californica, Salix spp., Prunus emarginata (Dougl.) Walp., Acer macrophyllum Pursh, and Quercus agrifola. Updates since L&C'72 are the following: 

Penrose and Westcott (1974):

"Chemsak and Powell (1971) discussed the mating behavior and habits of the immatures of this species on one of its hosts, Umbellularia californica (H. & A.) Nutt., in the central Coast Range of California. Alnus and Salix were also listed as host genera. In Oregon, 2 previously unreported host plant associations were discovered during the spring of 1971. Teneral adults and pupae were collected April 17 under the bark of decayed logs of bitter cherry, Prunus emarginata (Dougl.) Walp., at Salem, Marion Co., and adults were reared from pupae collected April 5 from portions of a dead trunk section of big leaf maple, Acer macrophyllum Pursh., in McDonald Forest, near Corvallis, Benton Co."

Ian Swift (2008): 

Linsley and Chemsak (1972) list Alnus, Umbellularia californica (Hooker and Arnott) Nuttall, and Salix as hosts for this species. To this list can be included Quercus agrifolia, from Marin County, California (ISPC, CASC). Adults were reared from long-dead logs that were covered in thick moss and lichens. The larval development is similar to that reported by Chemsak and Powell (1971).

References

1. Chemsak, J.A. and J.A. Powell. 1971. Behavior of Leptalia macilenta (Mannerhiem), with a description of the pupa (Coleoptera: Cerambycidae). The Pan-Pacific Entomologist 47(2):101-104.
2. LeConte, J. L. 1857. Report upon Insects collected on the survey. In, Report of Explorations and Surveys to ascertain the most practicable and economical route for a railroad from the Mississippi river to the Pacific Ocean. Made under the Direction of the Secretary of War, in 1853-5, according to Acts of Congress of March 3, 1853, May 31, 1854 and August 5, 1854, 12:1-72, 2 pls.
3. Linsley, E. G., and J. A. Chemsak. 1972. Cerambycidae of North America. Part VI. No. 1. Taxonomy and Classification of the Subfamily Lepturinae. University of California Publications in Entomology 69,  xiii+138 pp, 2 pl.
4. Mannerheim, C. G. von. 1853. Dritter Nachtrag zur Käfer-Fauna der Nord-Amerikanischen Länder des Russischen Reiches. Bull. Soc. Imp. Natur. Moscou, 26(2):96-273.
5. Penrose, R. L. and Richard L. Westcott.  1974b. Notes on the Distribution, Hosts and Bionomics of Some Pacific Northwest Cerambycidae (Coleoptera). The Coleopterists Bulletin, Vol. 28, No. 4 (Dec.), pp. 233-236
6. Swift, Ian. 2008. Ecological and biogeographical observations on Cerambycidae (Coleoptera) from California, USA. Insecta Mundi, 0026: 1-7.