INSECT ENEMIES OF EASTERN FORESTS 295 
KEY TO MORE IMPORTANT POWDER-POST LARVAE—Continued 
hes Chitinization of labium broken in middle; prothoracic spiracle 
larger) than antennal ring 22 = 2202-2 2 Dendr obiella; Xylobiops 
Chitinization of labium continuous across middle; prothoracic 
Spiracleysimallile reuse e728 Seales ee ey a lis ahs et een ia Scobicia 
18. iworocelitalaiorum entines ses wa. eo | Lichenophanes armiger 
INO RO Ce lies eee eye ee ee See dh ee I 19 
19. Spiracle with a spoutlike process; style shorter than lacinia 
Iichenophanes bicornis 
Spiracles without process; style longer than lacinia 
Amphicerus; Apatides 
SPECIES OF PTINIDAE 
The white-marked spider beetle (Ptinus fur L.) is a small (about 
3 mm.), brown, oval, long-legged beetle, whose habitus suggests a 
spider, is cosmopolitan and frequently found in buildings and ware- 
houses, where it feeds on dried vegetable or animal matter. It is 
sometimes injurious to collections of seeds and dried plants and has 
been found boring in pine and oak woodwork. The brown spider 
beetle (Ptinus brunneus Dufts.) has been taken from pine boards in 
old buildings. 
SPECIES OF ANOBIIDAE 
Anobium punctatum Deg. and Petalium bistriatum Say have simi- 
a habits. The former is a small elongate subcylindrical brown beetle, 
5 to 4 mm. in length, which is cosmopolitan, and infests pine floor- 
ae joists, and furniture, and the larvae often cause much damage. 
Some species of Catorama sometimes infest stored pine cones 1n the 
South; another has been found in the seeds of juniper in Arizona. 
Dorcatoma spp. are found in woody fungi. 
Ernobius mollis (Li.), a small brown beetle 4 to 5 mm. in length, 
native to Europe, is established in this country, occasionally doing 
much damage to pine and spruce woodwork, especially flooring, in 
houses. Apparently it is becoming more abundant. It sometimes 
damages lumber containing bark, especially that held for 2 or 3 years. 
EL’. granulatus Lec. is recorded as attacking stored pine cones in Lout- 
siana, and /. alutaceus Lec. as attacking the sapwood of larch and 
spruce logs in the Northeast. 
Hadrobregmus carinatus (Say) and H. gibbicollis (Lec.) are small, 
elongate, subcylindrical, reddish-brown beetles from 3.5 to 6.5 mm, 
in length, whose larvae feed in flooring and beams of buildings, often 
causing much damage. H. wmbrosus “Fall attacks the woodwork of 
furniture. 
The cigarette beetle (Lasioderma serricorne (¥.)) is a smal. elon- 
gate, oval, light-brown beetle, which is a common pest of tobacco and 
a great variety of stored vegetable matter, and, occasionally, of stored 
animal products. It interests the foresters chiefly because of its dam- 
age to herbarium specimens and seeds. 
"iM tcrobregma emarginatum (Duft.) is a brown beetle, 4 to 5 mm. 
in length, which feeds in the outer bark of pine and hemlock trees. 
It has also been recorded from hickory wood but is seldom injurious. 
Nicobium hirtum (Ill.) is a European species found in furniture in 
Virginia, South Carolina, and Louisiana, and is probably well estab- 
lished in this country. Snyder (392) reported it as having been found 
