786 
EULEUCOPHAEUS. Bv Dr. M. Drattdt. 
rubridorsa. 
norba. 
minette. 
hualapai. 
dyari. 
lares. 
mania. 
macellaria. 
numa. 
nitria. 
oliviae. 
2. Division: vein 1 b of hindwing present ( Hemileucinae). 
29. Genus: Enleiicophaeus Pack. 
This genus contains 1 dozen of medium-sized, rather scantily scaled lepidoptera distinguished by a 
certain sexual dimorphism. Nearly all are brownish-grey, more or less tinted pink, with 2 white transverse 
bands and a small frequently unsealed discal spot, a brownish-red abdomen, some species being difficult to 
separate. Like all the genuine Hemileucidae they have a vein 1 b, though it is very feeble; the cross-vein is 
extremely feeble in both wings, so that the cell is practically open. On the forewing 2, 3, and 4 arise at almost 
equal distances, 5 and 6 from the upper cell-angle, 7 and 8 and 10 rather close together from the anterior 
margin of the cell shortly before the cell-angle. On the hindwing 5 and 6 likewise arise from the upper cell- 
angle either together or close together, 7 a little before it. Antennae of $ bipectinate, in the $ serrate, partly 
with rather long ciliary bristles, so that they almost look short-combed. Thorax with very long hair. The 
larvae are exactly like those of Saturnia, cylindrical, with thorns ramified fir-like on tubercles. All of them 
probably live on grass; Prof. Cockerell has ascertained that they may even do much harm to pastures. 
Packard considers this genus to be merely a section of Hemileuca , but owing to biological and some habitual 
differences from the latter we keep it up. 
Type: E. tricolor Pack. 
E. tubridorsa Fldr. (120 a). The $ is brownish-grey with broad ochreous veins and costal margin, 
2 whitish transverse bands, the exterior one of which is distinctly undulated; hindwing scarcely lighter, with 
a basal pink tint and very feeble traces of a postmedian shadowy band. The $ is but little larger. Mexico (City). 
norba Drc. (120 a) is somewhat lighter, the costal margin of the forewing much narrower ochreous, hindwing 
paler, more extensively pink at the base, with a distinct darker postmedian shadowy band which is bordered 
with whitish outside. The ^ is larger than that of rubridorsa, the yellow veins and white transverse lines much 
less prominent. Zacualpan, Amecameca. minette Dyar is a somewhat smaller form, described according to 
a single $ from Mexico (habitat not certain); it surely belongs to this species and is said to be distinguished 
by a larger white, centrally unsealed discal spot on the forewing. Hindwing with a distinct white postmedian band. 
E. hualapai Neum. is an uncertain species described from a single $ from South-West Arizona; it must 
be closely allied to mania and has likewise an ochreous costal margin of the forewing, being distinguished by 
but one feeble postmedian transverse line, the anterior one being absent altogether. From Cuernavaca (Mexico), 
numbers of a species in both sexes are before me, which may be allied to hualapai, whilst the may also be 
allied to lares. In honour of Dr. Dyar in Washington, who was the first to search into the graminivorous 
species: - dyari sp. n. (120 a). The <$ resembles mania and is somewhat smaller on an average, with rather 
straight, narrow and quite parallel white transverse lines, the exterior line proceeding relatively near the 
apex; median area very broad; hindwing whitish, basally very feebly pink, with a distinct grey postmedian 
and marginal band. Thorax greyish-white, abdomen bright brownish-red. The larger $ is very pale, both 
the fine white transverse lines obliterated. Types in the Coll. Drattdt. 
E. lares Drc. is neither certain, described from a single <$, from Durango City; it must be allied to the 
preceding species, but according to the figure it has much more sinuate and broader white transverse bands, 
a narrower median area and a dull yellow abdomen with pink hair only at the base. 
E. mania Drc. (120 b) is the largest species, of a most variable colouring, from brownish-grey to a pure 
pink ( — macellaria /. n.) (120 b), with a narrow ochreous costal margin, broad white transverse bands and 
almost purely white hind wings. Eastern coast, State of Vera Cruz. My father found the larvae on various 
species of grass, also on maize, in December; they were light reddish-brown with blackish knobbed tubercles 
with star-hairs, the green pupae between threads in the grass yielding the imagines in February. 
E. numa Drc. (120 b) is a smaller, much darker, greyish-black species with quite dark hindwings; the 
median area enclosed by the white transverse lines is variably broad as in all the other species, the whitish 
discal spot either very near to the antemedian line or quite separate. Base of hindwing dark pink. The larger 
$ shows a duller colouring, the base of the hindwing is much more extensively pink. Mexico (City). nitria 
Drc., the type of which is before me from the Coll. Stgr. (Berlin Museum), is said to be somewhat larger, 
which however I find to be incorrect on comparing it with the series of numa lying before me. Base of hindwing 
without pink; I cannot find any other essential difference. The type is only labelled: Mexico, without any 
habitat stated. 
E. oliviae Ckll. (120 c) is very similar to mania, but it has no ochreous costal margin of the forewing 
and the ground-colour is much paler, so that the feeble white transverse bands being especially broad in the 
are rather indistinct. From New Mexico, in September and October. The larva described by Cockerell 
is ochreous with darker brown markings, a dark brown head and black, firtree-like thorns, living on grass 
