HETEROPACHA. By Dr. M. Draudt. 
623 
variation only. Male yellow to brown, variously shaded; female generally yellow, the veins often brown-lined. 
Larva with round, often double, white segmental dorsal spots. The larvae spin no nest, but will congregate in 
masses on the tree-trunks. Found on oak and various forest trees. Northern United States from Atlantic to 
Pacific. 
M. texana Beut. (86 a). Described as a form of disstria, but lacks the habitus of that species. Eorewing lexuna. 
pale clay-colour, irrorate; lines brown, clear cut, without pale edges. Only males before me. I think it may 
be a good species allied to tigris. Female and larva unknown. Texas. 
M. tigris Dyar (86 b). Both sexes yellow, irrorate, female more heavily so; lines brown, slender, faint tigris. 
or obsolete in the male; hindwing brown-shaded with central band. Larva on dwarf oak, without web, brilliantly 
marked with orange, the double lateral line slightly obliquely dislocated on the segments. Colorado. inducta inducta. 
Dyar is a form more heavily dusted with red-brown, also in the male more heavily than in the normal female 
of tigris ; hindwing darker than forewing. 
M. fragilis Stretch (86 a). Red-brown, seldom chocolate brown, very variable; female usually largely fragilis. 
luteous, the white lines fading into the ground and leaving their dark borders as dark lines across the wing. 
Arizona, Colorado, Montana, Utah, Nevada, Wyoming, California. - azteca Neum. (86 b) is more chocolate azteca. 
brown, the sexes similar; lines pale, narrow, more or less crenulate. Mexico, widely distributed. - inus A T e«m. mus. 
is similar to azteca, wings greyer, often markedly irrorate with white. Utah. — incurva H. Edw. (= discolorata incurva. 
Neum.) is chocolate brown as azteca, but the wing invaded at the base and outer margin more or less with 
luteous whitish. Arizona, Utah. — constrictina N. D. (= lutescens N. & D.) is an aberration of the male constridina. 
with the lines of the normal female of fragilis. Arizona. — perlutea N. <£• D. has a very light yellow male, but perlutea. 
the specimens may be faded. Utah. Larvae with blue markings predominating, the orange reduced. In webs 
on aspen and various trees and shrubs. 
M. luteimargo Dyar (86 b). Both sexes with wings luteous, the lines brown, crenulate, more or less luteimargo. 
shaded across. Hindwing brown shaded at base. Mexico. Occurs with azteca, but very different in colour and 
apparently without transitions. 
M. onissa Dyar (86 b). Known only in the male. Large, brown, irrorate, the lines dark with traces of onissa. 
pale edges, the forewing pointed at tip, fringe checkered with white. Hindwing dark, uniform. Mexico (Za- 
cualpan). 
M. pluvialis Dyar (86 c). Male red-brown with distinct pale lines; female pale with narrow dark lines, pluvialis. 
Oregon, Washington, British Columbia. Larva with much orange, little blue, in webs on alder and other trees 
or bushes. — recenseo f. n. Dyar (86 c). Male dark brown, forewing irrorate and with narrow dark lines; female recensco. 
yellow with dark lines on forewing. This new race occurs on the mountains of California (Truckee and Siskyou). 
Larva intermediate between fragilis and pluvialis, both blue and orange nearly evenly developed. 
M. ealifomica Pack. (= pseudoneustria Bsdv.) (86-c). Markings of pluvialis. Female more or less brown califomica. 
shaded, when heavily so the lines are pale instead of dark. Larva black with red hairs. On live oak. California. 
M. ambisimilis Dyar (86 c). Markings of califomica. Larva with red hair dorsally, white subventrally, ambisimilis 
the body marked with wavy red lines and blue-white spots laterally. On various shrubs, not oak. California. 
M. constricta Stretch (= strigosa Stretch) (86 d). Male light clay-yellow with slender dark lines; female constricla. 
brown, more or less whitish dusted and with brown lines with pale edges. Larva with orange dorsal stripe and 
tufts, lateral blue area and subventral white tufts. On deciduous oak, the egg-masses white, not brown as in 
all the other species. California. 
23. Genus: Meteropaelia Haw. 
Only one small species with relatively narrow wings, distinguished by hairy eyes, shorter pectinate 
antennae, and scantily scaled entire-margined wings. On the forewing 6 and 7 on a short stalk; cells in both 
wings open; on the hindwing 6, 7 and 8 rise close together in the basal third. 
Type: H. rileyana Harv. 
H. rileyana Harv. (86 d). Dark brownish-grey, with darker veins, 2 irregular transverse lines edged rileyana. 
with a lighter grey, and a row of small dark subterminal spots; fringe checkered. Hindwing of same colour with 
a grey band in the centre of the costal margin. Missouri. 
