178 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 92 
Pseudopityophthorus Swaine breeds in the bark of broadleaf trees. 
Myeloborus Blackman breeds in the small twigs of pines. Conoph- 
thorus Hopkins breeds in the cones of pines. G'nathotrichus Kichhoft 
lives as an ambrosia beetle in the wood of conifers. 
So far as known the habits of the genera peculiar to tropical America 
are as follows: The two known species of Pityophthoroides, new genus, 
breed in the bark of deciduous trees or shrubs. The two known species 
of the genus Spermophthorus Costa Lima breed in the seeds of Caesal- 
piniaceae. Thamnophthorus Schedl (as represented by 7. schwarzi, 
new species) breeds in the seeds of Persea spp. of the family Lauraceae. 
All species of the typical Neodryocoetes Eggers and also some of the 
subgenus Veopityophthorus Sched! are found in the seeds or pods of 
various members of the families Asclepiadaceae, Sterculaceae, Pal- 
maceae, Fabaceae, Leguminosae, and Caesalpiniaceae. One species 
of the subgenus Neopityophthorus Schedl was taken on several occa- 
sions from the bark of unidentified wood used in shipping crates. It 
is very probable that several species of this subgenus will be found to 
breed in bark, and it is not at all improbable that some species of WVeo- 
dryocoetes s. str. may also be found in such material. 
Genus THAMNOPHTHORUS Schedl 
Thamnophthorus ScHept, Arch. fiir Naturg., vol. 7, p. 174, 1938. 
No genotype is indicated, but the author described three species, 
Thamnophthorus linearis Schedl, 7. volastos Schedl, and 7. nudus 
Schedl. 7’. volastos Schedl is hereby designated as the genotype. 
THAMNOPHTHORUS SCHWARZI, new species 
PLATE 20, FIGURES 1, 2 
Female.—Piceous-black, with elytra piceous-brown, shining; 2.43 
mm. long, 2.41 times as long as wide. 
Frons mostly concealed in. type, but dissected paratype with frons 
transversely flattened, subconclave between upper angles of eyes, sub- 
opaque, very finely and densely punctured, with fine, short hairs, me- 
dian line shining, not carinate; epistomal region in middle third ele- 
vated and shining. Eye moderately large, rather coarsely faceted, 
inner border rather widely, not deeply emarginate. Antenna (fig. 1) 
with club and scape nearly equal in length, funiculus slightly less than 
half as long as either; club irregulary obovate, nearly 1.5 times as long 
as wide, first suture notched on upper border, strongly, diagonally 
septate on upper half, lower half with no indication of annulation, 
septum, or setal row. 
Pronotum nearly exactly as wide as long, widest at base, which is 
margined and feebly arcuate, posterior angles somewhat rounded, 
