284 
Beetles 
narrow, with the margins of the body nearly parallel. In the south occurs 
the genus Mallodon, and on the Pacific coast the genus Ergates (with a 
single species, spiculatus), both 2J inches long, and with the lateral margins 
of the prothorax with many fine sharp teeth. The larvae (Fig. 393) of 
Ergates live in the giant sugar and yellow pines of the Sierra Nevada forests. 
The cloaked knotty-horn, Desmocerus palliatus (PI. II, Fig. 1), is a 
beautiful species, dark greenish blue with the bases of the elytra orange- 
yellow ; the larvae bore in elder-pith. Cyllene robinice, the locust-borer (PI. II, 
Fig. 395.—Maple-tree borer, Elaphidion villosum, larva, pupa, and adult beetle. 
(After Felt; natural size.) 
Fig. 15), is black, with striking yellow bands often found on goldenrod; 
its larvae live in locust-trees. A similar species, Cyllene pictus , attacks the 
hickory. The red milkweed-beetle, Tetraopes tetraopthalmus (PL II, 
Fig. 10), brick-red with black spots, is a common species on milkweeds; 
the larvae bore into the lower stems and roots. Two beautiful Cerambycids 
of California are shown in Figs. 2 and 16 of PL II. 
The sugar-maple borer, Plagionotus speciosus (Fig. 394), is a serious 
pest of sugar-maples in New York and elsewhere in the East. The beetle, 
1 inch long, is black, brilliantly marked with yellow; the eggs are laid in 
