Semanotus amplus sequoiae ( Van Dyke, 1923 ) Van Dyke, 1923

James Hammond, H. E. & Williams, Daryl J., 2013, Casey’s conundrum, a review of the genus Semanotus Mulsant (Coleoptera: Cerambycidae: Cerambycinae: Callidiini) in North America, Zootaxa 3670 (2), pp. 101-136 : 128-130

Semanotus amplus sequoiae ( Van Dyke, 1923) , new status

( Figs 5 C,E, 15A, 16G; Map 9)

Semanotus ligneus sequoiae Van Dyke, 1923

Material examined. 91 males, 118 females.

Diagnosis. This subspecies can be separated from other subspecies of S. amplus by the following combination of characters: elytral disk usually distinctly bicolored with basal 1/3 light brown to red and apical 2/3 dark brown to black; elytral humeral angles usually light brown but occasionally markedly darkened similarly to S. a. basalis ; antennae are dark brown to black.

Hosts. Sequoia sempervirens (redwood).

Flower and Associated Vegetation Records. Libocedrus decurrens (incense-cedar).

Distribution. California. One population located near Falls Church, Virginia (see Remarks).

Remarks. This subspecies tends to be the most characteristic form among subspecies of S. amplus . The coloration is fairly distinctive in that it ranges from completely black to the basal 1/3 of elytra orange to red and the apical 2/3 black. The legs and antennae generally are entirely black, however, there is variation in this character. The punctures in the apical ½ of the elytra tend to be closer together than in the basal pale area, with slightly more foveate punctures which gives the surface a somewhat wrinkled appearance.

We examined one series of specimens (9 males, 11 females) reared from Sequoia sempervirens , March 24, 1920, from Falls Church Virginia. The specimens all had the same Hopkins Number [Hopk. U.S. 16160a], however, there was no collector information. We presume that these specimens were either collected from a transplanted tree, nursery stock, arboretum, or a log, that originated from the west coast and was shipped to Virginia.

Figures

FIGURE 5. A. Pronotum of male S. australis, B. Mandibles of male S. australis, C. Pronotum of male S. a. sequoiae, D. Profemur of male S. japonicus, E. Profemur of S. a. sequoiae, F. Elytral pubescence of female S. ligneus, G. Elytral pubescence of female S. a. amplus.