Glacial Period on the present fauna of N. America. 185 



[Table continued.] 



Families. 



S>N 



S+-N 



N>S 



N>D 



N + D 



D>N 



D>E 



D + E 



E>D 



Spondylidse 





1:1 







1:1 



1:1 



1:1 



1:2 



1:1 



Cerambvcidas 



27:32 



22:90 



12:14 



8:8 



23:170 



55:95 



8:11 



67:258 



51:74 



Chrysomelidae 



20:30 



21:75 



8:12 



3:4 



25:144 



40:95 



6:8 



60:431 



22:34 



Bruchidfe 



2:9 











1:7 





1:32 



3:4 



Tenebrionidas 



26:37 



12:54 



4:4 



9:15 



8:33 



22:30 



5:5 



28:97 



34:72 



Aegialitidas 



1:1 



1:1 

















Cistelidse 



2:3 











7:22 





7:33 



2:6 



Othniidas 





1:1 













1:2 



1:2 



Lagriidse 

















1:1 



1:3 



Melandryidae 



1:1 



3:6 



2:2 



2:2 



5:11 



23:33 



7:8 



19:37 



3:3 



Pytbidae 



5:5 





1:1 



1:1 



1:1 



5:5 





2:3 



1:2 



Oedemeridae 



3:3 



2:6 



1:1 





3:9 



3:3 



1:1 



5:12 



2:3 



Cepbaloidae 







1:1 





1:3 



1:2 









Mordellidas 



2:4 



1:3 







1:4 



2:14 





4:100 



3:4 



Anthicidas 



3:16 



1:6 



1:1 



1:1 



1:6 



6:35 



1:1 



6:69 



4:7 



Pyrocbroidse 







1:1 





1:3 



3:3 



1:1 



3:7 





Heloidse 



7:11 



4:33 





1:4 



4:25 



5:8 





8:69 



7:20 



Rhipiphoridas 



2:3 











3:11 





3:19 





Stylopidae 













2:2 



1:1 



1:1 





Rhinomaceridas 



1:1 



1:3 







1:2 







1:2 





Rbyncbitidse 



1:1 



1:5 







1:3 



3:7 





4:14 





Attelabidae 











1:3 



1:3 





1:4 





Byrsopidae 

















1:1 





Otiorbyncbidas 



12:16 



6:11 



3:4 



9:12 





11:15 



3:4 



8:13 



23:33 



Curculionidae 



17:22 



16:77 



10:11 



5:5 



19:138 



52:80 



14:19 



56:411 



28:44 



Brentbidas 

















1:2 



1:1 



Calandridae 



6:7 



2:7 







3:19 



5:7 





7:36 



13:17 



Scolvtidae 



1:1 



9:34 



2:2 





10:58 



12:22 



2:2 



22:99 



4:5 



Anthnbidae 



2:2 



334:521 





1:1 



81:104 



1:1 



9:11 



2:2 



8:18 



7:10 



Totals 



281:1300 



88:101 



307:2355 



690:1446 



129:169 



844:5072 



432:673 



Translating these totals into percentages we shall reach the 

 following figures : 



Districts. 



S>N 



S + N 



N>S 



N>D 



N + D 



D>N 



D>E 



D+E 



E>D 



Percentages 



48:27 



40:68 



12:5 



8:3 



28:60 



63:37 



9:3 



60:86 



31:11 



Or, if we place the percentages of the west and the east in 

 parallel columns, we shall have the following : 





West 



East 



North 



12 : 5 



9: 3 

 60: 86 



In common 



40: 68 



South 



48 : 2V 



31 : 11 



