DIVISION OF INSECTS—ALDRICH. 377 
PLATE 8. 
Conspicuous beetles (order Coleoptera) from the vicinity of Washington, D. C. 
Natural size. 
1. Scaphinotus shoemakeri Leng. A bluish-bronzed bettle found rarely in the 
wooded ravines of Rock Creek Park and along the Virginia shore of the 
Potomac above the city; adults are found in September. They feed on 
snails. 
2. Calosoma scrutator Fabr. <A tree-climbing, green “ caterpillar hunter,” often 
abundant in early summer. 
8. Alaus oculatus Linn. The “ eyed elater,” the most conspicuous of our native 
“ snapping beetles,” whose larvae follow and prey upon the young of wood- 
boring beetles. The black spots are, of course, not the eyes, which are 
situated on the head. 
4, Dorcus parallelus Say. One of the less common stag beetles, family 
Luecanidae. 
. Acanthocinus nodosus Fabr. A gray and black “long horn” beetle, whose 
larvae develop under bark of pine, and whose protective coloration makes 
the adult almost invisible when resting in the crevices of pine bark. 
6. Osmoderma scabra Beauv. A scarabaeid breeding abundantly in the decayed 
eontents of hollows in the trunks of living deciduous trees. Sometimes 
called ‘ Russia-leather beetle,” because of the similariy of its strong but 
not unpleasant odor. 
7. Merinus laevis Oliv. A dull black beetle breeding in rotten logs; the larva 
resembles a wireworm. 
8. Lucanus elaphus Fabr. A stag beetle, very rare in the vicinity, but more 
abundant in the Middle States. The females have small jaws. 
9. Lucanus dama Thunb. The common stag beetle. The female also has small 
jaws. The larvae are “ white grubs,” and live under old hardwood logs 
or stumps. ; 
10. Passalus cornutus Fabr. The “ Betsy bug.” Occurs commonly in galleries 
in the soft outer wood of decaying deciduous logs, and is unique among 
beetles in that the pair of adults are supposed to attend and care for their 
young. Both adults and young are able to squeak. 
11. Pinotus carolinus Linn. The largest native “tumble bug.” It flies about at 
night and is often attracted to lamplight. 
1 
PLATE 9. 
Beetles (order Coleoptera) photographed by H. S. Barber. 
1,1la, 1b. Paratyndaris chamaeleonis Skinner, from Brownsville, Texas. En- 
larged nearly six diameters. Adults occurred on the shrub Condalia obo- 
vata. 
2. Lycostomus lateralis Melsh. Male, from Paradise Key, Florida. Enlarged 
nearly six diameters. 
3, 8a. Cossonus hubbardi Schwarz. Type. Tucson, Arizona; the larve live in 
dead giant cactus. Enlarged nearly six diameters. 
4, 4a. Chionanthobius schwarz Pierce. Potomac River above Washington, 
District of Columbia (the type locality) ; breeds in fruit of fringe tree, 
Chionanthus virginica. Enlarged about eight diameters. 
