256 THE CANADIAN e;nTOMOI.OGI.ST, 



black tomentum separated by cinereous areas of scales arranged in minute sep- 

 arated groups. Length, 16 to 26 mm. 



Hosts. — Breeds more commonly in lodgepole pine (Piniis contorta) than 

 in yellow pine (Pinus pondcrosa). 



Habitat. — Colorado, New Mexico, Arizona, California, Oregon, Wash- 

 ington, Nevada, Idaho and British Columbia. 

 M. angusticollis Casey, 1913, Mem. on the Coleop. IV, p. 292. 



I have not seen this species nor can I find that it exists in any collection 

 other than that of Col. Casey, which, since it comes from Texas, is not strange. 

 Material from that state, in the Cerambycidae, seems to be notably absent in 

 collections. The position of the apical spine would separate it from any other 

 species. Length, 18.5 mm. 



Host. — Unknown. 



Habitat. — Texas. 



M. marmorator Kirby, 1837, Faun. Bor. Am. IV, p. 169. 



f alitor Lee. ; acutus Lacord. 



The characters given in the key are amply sufficient to distinguish this 

 species, which is still rare in collections. The vestiture of the elytra is ochra- 

 ceous white and brown or black in more or less definite patches. Length, 18 

 to 25 mm. 



Host. — Abies balsa mea. 



Habitat. — New York, V'ermont, Nova Scotia to Great Lakes Region. 

 M. scutellatus Say, (Cerambyx), 1824, Long's Exp. II, p. 289. 



resutor Kirby ; mutator Lee. 



I have this species from Alaska, Hudson's Bay, Michigan, Ontario and 

 Massachusetts, and have seen specimens from all the spruce regions of Canada. 

 The vestiture is either wanting or consisting of a few ashy, irregularly placed 

 scales. Some females, however, are fairly well covered with ashy vestiture of 

 no particular design. 



Alaskan specimens generally have the femora red but do not seem to 

 differ otherwise. The antennae, especially the scape, seem to be brownish 

 and seldom black as in M. oregonensis, and have the elytra vaguely bronzed. 

 The 5 9 are generally smaller than the $ $ . Length, 13 to 24 mm. 



Hosts. — Pinus strobns, P. banksiana, P. resinosa, Pi,cea canadensis, and 

 Abies balsamea. 



Habitat. — New England. Canada (except British Columbia), Alaska. 



M. oregonensis Lee, 1873, Smiths. Misc. Coll., XI, No. 264, p. 231. 



monticola Casey. 



Mr. Lawrence Reynolds very kindly examined Le Conte's type for me. 

 It was found to agree with what has always been called oregonensis in the west. 

 The large stout form, dense black color, and the scutellum distinguish this 

 species. The vestiture is much as in scutellatus. The $ 9 are as large as or 

 larger than the $ $ . M. oregonensis is distributed throughout the west where 

 Pseudotsuga taxifolin and Abies concolor are found, although it attacks other 

 coniferous species within the area. Length, 13 to 30 mm. 



Hosts. — Abies concolor, Abies magnifica, Pseudotsuga taxifolia, Pinus 



