Centrodera LeConte, 1850

Centrodera LeConte, 1850:325
     Rhamnusium; Haldeman, 1847:58
     Centrodera (Apatophysis); Gressitt, 1947:191
     Parapachyta Casey, 1913:216
           dayi Leech, 1963:178
           spurca (LeConte, 1857:63)
                 cervinus Walker, 1866:332

Centrodera is an endemic North American genus comprising a number of pale, or darkly-colored species which are nocturnal in habit and attracted to lights. Only one species, C. quadrimaculata (Champlain & Knull, 1922) is somewhat brightly colored, and might in fact be diurnal, as it does not quite have the "coarsely faceted" eyes that are common to the rest of Centrodera and other nocturnal lepturines, like the Ortholeptura. However that species is fairly rare and there are no published records of its habits. 

Currently, there are thought to be 11 species and two subspecies in North America, but only two of these occur in the Pacific Northwest. 

Above. Paratype of Centrodera dayi Leech at the Oregon State Arthropod Collection. 

Biology
See Leech (1963)  ... 

We are still learning very basic facts about the species of Centrodera. For example, Swift (2008, p.4):

Centrodera osburni Knull. The host plant of this rare species was previously unknown. Two male specimens were reared from the living root crowns of Ceanothus integerrimus in the San Gabriel Mountains of Los Angeles County, California (ISPC, LACM). The type locality is the New York Mountains in the Mojave Desert, a very different biogeographic region than that of the more coastal populations, and likely more than one host is involved. The female of this species remains undescribed.”

Notes

1. Gressitt (1947) argued that the Palearctic genus Apatophysis should be considered a subgenus of Centrodera Leech (1963) considered the genera distinct.  
2. Svacha and Danilevsky (1989, p. 15) comment on taxonomic problems in the North American Centrodera.  
3. Wings have closed cell in the anal sector. 

Type Specimen Images
Images of the type specimens for each species have been made available on Larry Bezark's Photographic Catalog of the Cerambycidae of the World. 

References

1. Casey, T. L. 1913. Further studies amongst the American Longicornia. Memoirs on the Coleoptera, 4:193-388. <Link to Biodiversity Heritage Library>
2. Gressitt, J. L. 1947. Notes on the Lepturinae (Coleoptera: Cerambycidae). Proceedings of the Entomological Society of Washington. 49 (7), 190-192.
3. Haldeman, S. S. 1847. Material towards a history of the Coleoptera Longicornia of the United States. Trans. Amer. Philos. Soc., 10:27-66.
4. LeConte, J. L. 1850. An attempt to classify the longicorn Coleoptera of the part of America, north of Mexico. J. Acad. Nat. Sci. Phila., (2)1: 311-340. <Link to BHL>
5. 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.
6. Leech, H. B. 1963. Centrodera spurca (LeConte) and two new species resembling it, with biological and other notes. Proc. Calif. Acad. Sci., 32:149-218, 28 figs.
7. Swift, Ian. 2008. Ecological and biogeographical observations on Cerambycidae (Coleoptera) from California, USA. Insecta Mundi, 0026: 1-7.
8. Švácha P. and Danilevsky M.L., 1989. Cerambycoid larvae of Europe and Soviet Union (Coleoptera, Cerambycoidea). Part III. Acta Univ. Carolinae, 32, 1-2: 1-205. PDF.
9. Walker, F. 1866. Appendix, in J. K. Lord, The Naturalist in Vancouver Island and British Columbia. London,
   Richard Bentley, 2: x + 375 pp., 4 pls. (Walker's Appendix, p. 289-375).