146 



THE SCOLYTID BEETLES, 



Bibliography and Synonymy. 



?Bostrichus ligniperda Herbst, 1793, p. 107 (in part). 



Bostrichus micans Kugelaan, 1794, p. 523, original description. 



lEylesinus ligniperda Gyllenhal, 1813, pp. 335, 336 (in part). 



Dendroctonus micans (Kug.) Erichson, 1836, p. 53, type of genus. Bach, 1849, p. 144 

 Stein, 1854, pp. 277-279, habits, destructiveness. Kollar, 1858, pp. 23-28, 'habits' 

 control. Eichhoff, 1864, p. 27, pi. 1, fig. 5, tarsi, fig. 6, maxilla, fig. 7, labium, in 

 revision of genus. Lacordaire, 1866, p. 360, in revision of genus. Chapuis, 1869, 

 p. 35; 1873, p. 243, revised description. Lindemann, 1875, pp. 213, 221, pi. 1, figs! 

 1-10, male reproductive organs described and illustrated. Eichhoff, 1881, 

 pp. 125-128, fig. 23, adult, fig. 24, galleries, revision, bibliography, account 

 of habits, distribution, etc. Altum, 1881, pp. 262-266, description, biology 

 Judeich and Nitsche, 1889, pp. 458-462, life history, habits, importance, remedy. 

 Pauly, 1892, pp. 315-327, 4 figs, of galleries, habits. Verhoeff, 1896, pp. 124-133, 

 anatomy. Menegaux & Cochon, 1897, pt. 2, p. 120, habits, etc. Severin, 1902^ 

 p. 145, habits in Belgium. Weber, 1902, p. 108, fig. 5, enemy. Brichet et 

 Severin, 1903, pp. 244-258, habits, etc. Baudisch, 1903, pp. 151-152, habits, etc 

 Quairiere, 1904, pp. 626-628. Niisslin, 1905, pp. 175-178, habits, description, 

 importance. Quievy, 1905, pp. 334, 335. Severin, 1908, pp. 1-20, description, 

 habits, depredations, control. 



Eylesinus micans (Kug.) Ratzeburg, 1839, p. 217, Taf. VII, fig. 3, adult. 



Hylesinus {Dendroctonus) micans (Kug.) Ratzeburg, 1839, p. 217, Taf. VII, fig. 3, 

 adult; Taf. VIII, figs. 1, 2, 3, galleries, young larvaj, pupse. 



Fig. ?Q.— Dendroctonus micans: Distribution map. (Original.) 

 Subdivision D. 



The distinguishing characters common to the species of the fourth 

 subdivision are: 



Adult. — Front without median or posterior impression. Prono- 

 tum somewhat elongate, sHghtly narrower than elytra, moderately 

 constricted toward head, with regular punctures or without coarse 

 and fine punctures intermixed, long hairs absent on median and 

 posterior dorsal areas, present on anterior and lateral areas; head 



