146 



THE SCOLYTID BEETLES. 



BIBLIOGRAPHY AND SYNONYMY. 



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



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



? Hylesinus 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. Mene"gaux & 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. 

 Quairi^re, 1904, pp. 626-628. Nusslin, 1905, pp. 175-178, habits, description, 

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

 habits, depredations, control. 



Hylesinus 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 larvae, pupae. 



FIG. 89. 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, slightly 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 



