Scudder.] 
374 
[ Jan. 20, 
Rhynchitinae, but they have narrow metasternal side pieces. 
This subfamily, thus clearly distinguished, is for Rhynchitidae 
exceptionally rich in forms, since it contains no less than seven 
genera and thirteen species about equally divided between two 
distinct tribes, all extinct. This brings the total number of fossil 
American Rhynchitidae up to four fifths that of the existing 
forms, — a proportion which altogether surpasses that yet found 
in any other family of insects. The abundance and variety of 
the Rhynchitidae may therefore be looked upon as the most 
striking feature in the Tertiary Rhynchophorous fauna of North 
America. Of the twenty species found in our Tertiaries, three 
fourths are found exclusively at Florissant, the others occurring 
either at Green River, Wyo., or on the Roan Mountains, west- 
ern Colorado. 
The relative representation of the different families of Rhyn- 
chophora in the American and European Tertiaries as well as 
their representation in America today (according to Henshaw’s 
Catalogue of 1885) is set forth succinctly in the following table. 
Comparative View of Recent and Fossil Rhynchophora. 
In Numbers. 
In Percentages. 
Families. 
Recent 
North 
American 
Tertiary 
North 
American 
Tertiary 
European 
Recent 
North 
American 
Tertiary 
North 
American 
Tertiary 
European 
Rhinomaceridae 
5 
0 
0 
0.5 
0.0 
0.0 
Rhynchitidae 
25 
20 
5 
2.3 
10.3 
3.3 
Attelabidae 
5 
0 
1 
0.5 
0.0 
0.7 
Byrsopidae 
1 
0 
7 
0.1 
0.0 
4.7 
Otiorhynchidae 
115 
47 
17 
10.7 
24.3 
11.3 
Curculionidae 
640 
100 
100 
59.4 
51.8 
66.7 
Brenthidae 
5 
0 
0 
0.5 
0.0 
0.0 
Calandridae 
82 
10 
7 
7.6 
5.2 
4.7 
Scolytidae 
163 
5 
7 
15.1 
2.6 
4.7 
Anthribidae 
37 
11 
6 
3.4 
5.7 
4.0 
Totals 
1078 
193 
150 
100.1 
99.9 
100.1 
This table shows better than any words can describe some 
striking features in the American Tertiary fauna when compared 
with that now existing in North America, and indeed to a certain 
extent (and in the same direction) when compared with the 
