Bui. 83, Part I, Bureau of Entomology, U. S, Dept. of Agrici 
t 
I 
A 
t 
i» 
c 2 
B 
a? 
I 
C 
a 
b 4 
D 
02 fl} 
'3 
f-i 
O) 
CD 
cc 
a: 
rC3 
O r 
1. brevicomis 
2. barberi He 
3. convexifroi 
4. frontalis Z 
5. arizonicus 
6. mexicanus 
7. parallelocc 
8. approxima 
9. monticolx 
10. ponderoste 
11. jeftreyi Ho 
12. simplex Le 
13. pseudotsug 
14. piceaperda 
15. engelmann 
16. /-omiZ/'s H 
17. obesus Mai 
18. rufipennis 
19. initrruiiaii; 
20. punctatus 
21 . mica us Ku 
22. terebrans ( 
23. valens Lee 
Position doubtful— 24. adjunct™ 
Classification of the Genus Dendroctonu? 
Names and Specie 
This diagram will enable the reader to refer at c 
of any species number mentioned in the texi 
and relations of the divisions, subdivisions 
into which the "genus is divided. 
