THE GENUS DENDROCTONUS, 3 



HISTORICAL. 



The genus Dendrodonus was described by Dr. W. F. Erichson (1836) 

 to include (Bostrichus) micans Kug., (Scolytus) terebrans Oliv., 

 (Dermestes) piniperda L., (Hylesinus) minor Hartig, and (Hylesinus) 

 minimus Fab. 



Eichhoff (1864) revised the genus and referred D. 2nniperda (L.) and 

 D. minor (Hartig) to Blastophagus Yjichh. and later (1879) to Myelophi- 

 lus Eichh., and I), minimus (Fab.) to Carphohorus Eichh., leaving D. 

 micans (Kug.) as the type. 



Lacordaire (1868) referred to the synonymy and revised the descrip- 

 tion, including Dendrodonus junipiri Doeb. [ = PTilceosinus junipiri 

 (Doeb.)], D. valens Lee, and D. similis Lee. 



Zimmerman (1868) divided the genus into three groups, placing 

 B. hifurcus (= Carpliohorus hifurcus Eichh.) in the first, none in the 

 second, and D. terebrans (Oliv.) and D. frontalis Zimm. in the third 

 group. 



Le Conte (1868) revised the classification for the North American 

 species to include D. terebrans (OHy .) , Hylurgus obesus Mann., Hylurgus 

 rufipennis Kirby, B. frontalis Zimm., and two new species, B. pundatus 

 Lee, and B. simplex Lee. He here referred B. valens Lee. to B. tere- 

 brans (Oliv.) , and B. similis Lee. to B. obesus (Mann.) , He recognized 

 two divisions. Division B represented by D. frontalis, and Division A 

 by the other five species. 



Chapuis (1869) included B. micans (Kug,), D. valens Lee, B. tere- 

 brans (Oliv.), B. obesus (Mann.), and added one new species, B. paral- 

 lelocollis Chap., but did not recognize B. frontalis Zimm. 



Le Conte (1876) included B. terebrans Lac. ( = 01iv.), B. similis 

 Lee, B. rufipennis (Kirby), B. punctatus Lee, B. simplex Lee, B. fron- 

 talis Zimm., and one new species, B. brevicomis Lee He here 

 restored D. similis and omitted B. obesus. 



Dietz (1890) in his ''Notes on the Species of Dendroctonus of 

 Boreal America," revised the classification, principally on the char- 

 acter of the epistoma, which he considered of primary importance 

 in separating the species. He included D. terebrans, with varieties 

 a, b, c, d, B. rufipennis, B. similis Lee, B. simplex Lee, B. frontalis, 

 added one new species, D. approximatus Dietz, and referred D. puncti- 

 collis Lee to B. rufipennis (Kirby) and B. brevicoTnis Lee to B. 

 frontalis Zimm. 



Blandford (1897) mentioned D. terebrans (Oliv.), B. parallelocoUis 

 Chap., and an undescribed species from Texas — probably B. terebrans 

 (Ohv.)— and added one new species, B. adjundus Blandf. 



The writer (Hopkins, 1899a) referred to B. terebrans, B. rufipennis 

 (Kirby), B. simplex Lee, and B. frontalis Zimm., with descriptions of 



79980—09 2 



