29 
punctured than usual; but probably not distinct. The type of regularis 
Csy. is a female, probably of propinqua Bland., with the pronotum slightly 
wider and the elytra rather more sparsely punctured than usual. 
One hundred and thirteen specimens were examined from Colorado, 
New Mexico, Utah, Kansas, California, Washington, Oregon, and British 
Columbia. Other localities given in literature are Nevada, Arizona, and 
Idaho. It is a Sierra Nevada and Rocky Mountain species. 
Host plant: Picea engelmanni (Craighead). 
Type locality: Colorado territory; collected by James Ridings, in 
1865. 
(10) Leptura obliterata Hald., 1847, Trans. Am. Phil. Soc., (2), vol. 10, p. 62. 
soror Lee., 1873, Smith. Misc. Coll., No. 264, p. 223. 
perdudor Walk., 1866, Nat. Hist. Vane., vol. 2, p. 333. 
vitiosa Lee., 1854, Proc. Acad. Phila., vol. VIII, p. 18. 
idahoensis Csy., 1913, Mem. on the Coleop., p. 259 (cf). 
Length 11 to 18 mm. The body in the female is black with the first 
and last segments of the abdomen variably reddish; the head black; the 
pronotum black with the sides testaceous or reddish; the elytra testaceous 
or reddish, with a postbasal spot of varying size, a posthumeral lateral 
spot, a median transverse band and a post apical band, black; the apices 
reddish, rarely almost entirely black. The male is notably more slender, 
with the postbasal spot on the elytra frequently evanescent, and the 
apices in many cases black. The legs are usually yellow or bicoloured, and 
the antennse annulated in the females and in many cases entirely black in 
the males. 
The colour phase soror Lee. usually has the postbasal black spots 
evanescent or absent, the median black bands in some cases reduced to 
spots, and the apices usually entirely black. 
After examining a very long series we find ourselves unable to separate 
obliterata Hald. from soror Lee. by any satisfactory characters. The macu- 
lation varies greatly; the colour bands of the elytra in many cases become 
spots; the usually reddish elytral tips of the obliterata type are in some 
cases black; the males of the soror type in some cases have red elytral tips; 
and males with the discoidal black marking absent ( soror type) have been 
taken paired with the typical female obliterata. It is impossible to dis- 
tinguish one from the other in a long series. It is true that the soror type 
of Sierra Nevada mountains seems to be constant in that region, but both 
the soror and obliterata types are quite common in British Columbia. The 
type of vitiosa Lee. is a large female, with the elytra yellow, median spots 
faint, apex black. 
One constant colour character exists in all our specimens, in that the 
sides of the prothorax are testaceous. 
Two hundred and sixty-four specimens have been examined from 
California, Oregon, Washington, British Columbia, and Idaho. Other 
localities cited in literature are Nevada and Montana. 
Host plants: Abies, Picea, Tsuga, Pseudotsuga (Craighead), Pinus 
ponderosa (Hopping) for obliterata ; Pinus murrayana (Craighead) for soror. 
The type locality of soror Lee. was California, described in 1873; that 
of obliterata Hald., Oregon, described in 1847. 
61136—3 
