210 
TRACHEA. By Dr. M. Draudt. 
characta. T. characta Grt. (31 f). Forewing greyish-white, strewn with hlack, basal and central areas irrorated 
with ochreous-brown, before and behind the latter more whitish, in the marginal area darker with a black basal 
ray and white-edged transverse lines which are snbmedianly connected by the long, pointed coniform macula 
surrounded by black; the white maculae are dark-centred and surrounded by black, the ring-macula is obliquely 
elliptical; before the dark-shaded undulate line there are small black sagittae. Hindwing brownish-grey. Nevada, 
erica. Arizona. ■— In the form erica Sm. (31 f) the black submedian ray in the central area, and the hindmarginal 
half of the antemedian and postmedian areas, as well as an oblique patch from the reniform macula to the apex 
are quite light yellowish-white. Described from Utah. 
pluraloides. T. pluraloides McD. is on the forewing light ochreous with grey irroration chiefly along the costal 
margin, distal margin, and hindmargin. Transverse lines quite extinct; the narrow oblique ring-macula is 
surrounded by white, the small, dark-centred reniform macula is inside bordered with black, outside with white, 
the coniform macula is long and narrow; postmedianly in the lower half grey irroration; undulate line light, 
distinct, behind it the marginal area is darkened. Hindwing whitish, veins and margin somewhat smoky. 
Expanse of wings: 32 mm. The exterior of this species, described from Alberta, recalls Euxoa pluralis. (6 k). 
jocasta. T. jocasta 8m. (31 f) is somewhat similar to ‘pluraloides , but it is more yellowish-grey, the anterior 
transverse line is double, filled up with whitish, the reniform macula is not strangulated as in characta and 
only proximally bordei'ed with black; the small sagittae before the undulate line are quite indistinct or absent, 
the marginal area behind it is somewhat darker. Hindwing light brownish. Illinois; Chicago; South Dakota. 
luteocinerea. T. luteocinerea 8m. (31 f). Forewing light yellowish-grey, in the costal part whitish, with a black 
basal ray, the transverse line only noticeable at the costal margin, in its further course only marked by the 
contrast between the yellowish ground of the wing and the dark, greyish-brown central area, both being 
connected by the large, pointed coniform macula; the white maculae are surrounded by black, the ring-macula 
is obliquely elliptical; the marginal area behind the yellowish undulate line is darkened. Hindwing whitish. 
Montana. 
susquesa. T. susquesa 8m. (31 f) is a small reddish ochreous-brown species in the central area with a greyer 
tint, the anterior transverse line only marked by this contrast and blackish vein-streaks, the posterior line, 
which is submedianly connected with it by the coniform macula, is finely dentate; the upper maculae are 
grey-pupilled and in yellowish-rings; the undulate line consists of small reddish-brown sagittae. Hindwing 
brownish-grey. California. 
monica. T. monica B. <£? McD. (31 g) is very similar to susquesa and may be merely a somewhat larger race 
of it; the gronnd-colour is much deeper and almost without any light brownish tints which are only prominent 
behind the coniform and reniform maculae and are almost whitish; the marking is somewhat more indistinct, 
single veins in the marginal area are marked white. Hindwing somewhat lighter. Arizona. 
scrrula. T. serrula B. & McD. (31 g) is likewise closely allied with susquesa , but it has seriate antennae 
in the 8 ; the ground-colour is dark grey instead of brownish and the posterior transverse line is situate nearer 
to the reniform macula; only behind the latter and the coniform macula there is a lighter, ochreous area. Hind¬ 
wing almost whitish, only the veins and margin are somewhat brownish. California. 
bultata. T. bultata Sm. has wrongly been united with dilarci (31 e) by Hampson; it is a distinct species. 
Forewing on the reddish-yellow ground irrorated with a slightly coppery brownish, with single brown, whitish- 
edgecl transverse lines; the large broad coniform macula is surrounded with coppery brown, like the large upper 
maculae; the light undulate line is only traceable. Hindwing yellowish-brown. Expanse of wings: 35 to 38 mm. 
Colorado, in June, July. 
modica. T. modica Gn. (= subcedens Wkr.) (31 g) is a very common insect, light greyish-brown with a 
darker central area, behind it more whitish, with indistinctly double transverse lines and whitish maculae 
surrounded by black; undulate line indistinctly lighter, proximally shaded with olive-brown. Hindwing yellowish- 
brown. Canada to Colorado. 
mustelina. T. mustelirsa Sm. (31 g) is similar, lighter, more bluish-grey, easily recognised by the chocolate- 
brown head and collar; transverse lines double, the cell between the whitish maculae darkened blackish; before 
the undulate line blackish scaling, the marginal area behind it darkened. Hindwing light brown. California. -—■ 
Larva yellowish-brown with a distinctly defined, broad, yellowish-white lateral band. 
cthnica. T. ethnica Sm. (31 g) is a large, greyish-brown species, with hardly visible double transverse lines, 
the posterior line only marked by dots, and the maculae also very indistinctly surrounded, the undulate line 
proximally shaded with a somewhat darker colour. Hindwing blackish-brown. California. 
commoda. T. comitioda Wkr. Forewing blackish-brown, irrorated with purple grey and strewn with whitish, 
with very indistinct, somewhat grey-edged transverse lines, without the coniform macula, with lighter-ringed 
upper maculae; the undulate line consists of lighter small spots with darker small sagittae before them and dark 
internerval streaks behind them. Hindwing greyish-brown, at the margin darker. Canada; United States. 
- commoda is the eastern form from Ontario and Manitoba, generally with a more ferruginous reddish-brown 
colouring on the forewing than in the Alberta-race which is figured by Hampson as commoda and which is to 
