OTIORHYNCHID.A—PHYLLOBIINI. 57 
The species from the Rocky mountain Tertiaries included here are 
known only by their elytra, and are consequently not placed here with any 
certainty. They are, however, very similar to, though coarser in their 
sculpture than, other remains referred to the allied genus Seythropus, 
the latter of which are regarded as more definitely placed from the testi- 
mony of other parts of their structure. 
Table of the species of Phyllobius. 
Interspaces between elytral strive flat or broadly rounded. 
Strial punctures of elytra very large and coarse, as wide as or wider than the 
IMIDOLS WA CES ie ise et tite ae oe eas cae reise 2 Saye Agere ws Sew antecessor. 
Strial punctures of elytra only moderately large, narrower than the inter- 
G/DUMODE) oS ooeis Somes Rem ORES Oooo See etee ee AC eneioees .--- -Carcerarius. 
Interspaces between elytral strie with a median carina.........-..----.--..-- WUUus. 
PHYLLOBIUS ANTECESSOR. 
PL. 1x, Fig. 16. 
A single elytron with its reverse is all that 1s preserved. It is a little 
less than two and a quarter times as long as broad, gently vaulted, nearly 
straight, but with a scarcely perceptible arcuation, the humeral angle scarcely 
rounded, the apex rounded subacuminate. There are ten series of large, 
circular puncta, as large as or larger than the intervening interspaces, 
abruptly and rather heavily impressed, those in each row. separated from 
their neighbors by about the same distance as those of neighboring rows, 
but irregular, and with the intervening space barely channeled. — Inter- 
spaces flat or broadly arched, smooth. 
Length of elytron, 4""; breadth, 1:8". 
Roan mountains, western Colorado, from the richest beds at crest of 
bluff overlooking lead of East Salt creek. One specimen, Nos. 264 and 
301, U.S. Geological Survey. 
PHYLLOBIUS CARCERARIUS. 
PA, xe, ies 1A 
Only elytra are known. They differ from the preceding species, prin- 
cipally in having the markings less coarse. The breadth is contained a little 
