| @oaal PROCEEDINGS OF THE NATIONAL MUSEUM. 59 
In both of these species the costa is more convex than in any of the 
_ other species. 
Damalis is a fine bluish gray species in which all the markings are 
written in narrow, slightly darker lines, and the s. t. line is not pale. 
Rolandi is the smallest of the species of a dark, smoky, ash gray, the 
maculation barely traceable, but agreeing with damalis so far as it 
is visible. In fresh, perfect specimens the scales forming the loose, 
posterior thoracic tuft are chalybeus or metallic steel-blue, and from 
this character Mr. Grote derived his generic term, seeing in it a resem- 
blance to the Bombycid genus Tolype. 
In tabular form the species divide as follows : 
§. t. line pale, distinct at least in s. m. interspace. 
Dark gray, patagie discolorous gray ; basal dash and t. a. line united, distinct.. 
BOMBYCIFORMIS. 
Pale, bluish gray, all the lines obsolete, ordinary spots traceable...-....-- DEPILIS. 
§. t. line dusky, more or less broken. 
Very bright bluish gray, all the markings well written, size larger...... DAMALIS. 
Dark smoky gray; all the markings subobsolete, size smaller......,...,.ROLANDI. 
Eutolype bombyciformis sp. nov. 
Head and thorax dark gray, varying to almost umber brown. Front reddish in- 
feriorly. Disc of patagie paler, somewhat contrasting, blackish margined. Prima- 
ries varying from dark ash gray to blackish, the maculation almost obsolete in the 
dark forms. Basal line indicated in pale specimens. T. a. line dusky, obsolete, 
geminate, distinct to the basal black dash, which is here curved, hook-shaped, in- 
dicating the claviform and united to the t. a. line, together inclosing the upper part 
of basal space. In pale specimens the basal dash is marked with rusty red, recall- 
ing certain species of Notodonta. 'T. p. line faint, single, widely exserted over reni- 
form, very irregular, and reaching the inner margin just within thes, t. line, where 
-itisalso best marked. S. t. line lunulate, black, followed by whitish or yellowish 
powderings, sometimes all obsolete, save a white lunule opposite anal angle, com- 
plete only in pale specimens. Orbicular round, very little paler, narrowly black 
ringed. Reniform large, upright, somewhat constricted centrally, with a broad 
vague pale annulus, inwardly emphasized with black. Secondaries whitish to 
smoky, darkest outwardly, with a faint outer line and discal lunule. Beneath vary- 
ing from gray to smoky brown on primaries; paler, with an outer line and discal 
lunule on secondaries. 
Expands 37 to 40 millimetres = 1.48 to 1.60 inches. 
HABIvraT: Ohio; Illinois; Missouri. 
Four specimens are in the Museum collection (collection of C. V. R., 
J.B. S., and Ace. 20395), one of them marked No. 490, March 11, 
1874, from the Riley collection. 
This is the species which I had seen marked electilis Morr., in collec- 
tions, and which I have so named on the faith of these determinations; 
but comparing the specimens at hand with the description, it is simply 
impossible that Morrison could have had similar examples before him. 
Where the original erroneous determination came from I do not 
know, nor do I know where Morrison’s type is to be found. 
The small series before me shows quite a decided range of variation, 
a . 
