. The American entomologist. Entomology. Plagiodera scripta : showing variations (after Riley). feeds more particularly on Willow, as we have found it quite commonly on Black Willow in Missouri. The accompanying figure will show the more perceptible color- ational differences between this and the preceding species, the more constant struc- tural difference between the two consisting in the claw-joint being dentate beneath in scripta, and simple in lapponica* But the larvae of the two are so much alike as not to be easily distinguished even upon the closest scrutiny. A third species of the genu
. The American entomologist. Entomology. Plagiodera scripta : showing variations (after Riley). feeds more particularly on Willow, as we have found it quite commonly on Black Willow in Missouri. The accompanying figure will show the more perceptible color- ational differences between this and the preceding species, the more constant struc- tural difference between the two consisting in the claw-joint being dentate beneath in scripta, and simple in lapponica* But the larvae of the two are so much alike as not to be easily distinguished even upon the closest scrutiny. A third species of the genus, viz., P. tremulcB Fabr., is found in the more northern parts of the conti- nent, and like P. lapponica, it is common to both Europe and America. Here it injures the leaves of the common Aspen {Populus tremuloides), the beetle itself being easily distinguished by the uniformly steel-blue color, with the exception of the wing-cov- ers, which are just as uniformly clay-yel- * As both species are very variable and both have the uni- formly steel-blue form, and as their larvse are undistinguish- able, it may be questioned whether this structural feature can be relied on, and we opine that lapponica (Linn.) like conflu ens (Rogers) and perhaps obsoleta (Say) are but pronounced forms of this scripta^ though science will be best served by referring to them under their several Plagiodera Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Metcalf Collection (North Carolina State University). NCRS. New York : Max Jaegerhuber
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectentomology, bookyear1
