144 BULLETIN 38, UNITED STATES NATIONAL MUSEUM, 



sometimes narrow, sometimes broad, kidiiey-sbaped. Claviform mod- 

 erate, outlined and sometimes filled with black. T. a. line geminate; 

 included space pale; obsolete on costa, augulate between veins. T. p. 

 line crenulate, course as usual except that in some specimens it is more 

 incurved beneath cell. S. t. line usually very distinct, white or yellow, 

 sometimes interrupted, always dentate on veins 3 and 4, and 

 always i)receded by a row of black sagittate spots. Cell before, be- 

 tween, and beyond ordinary spots to t. p. line black. A basal black 

 mark. Secondaries pale fuscous. Beneath, variable, powdery, with a 

 common line and discal lunule. Head and thorax concolorous, more 

 or less mixed with whatever the pale color of primaries may be. Collar 

 inferiorly also pale, limited above by a black line. 



Expands 45-50""" ; 1.80-2 inches. 



Habitat. — Colorado, Oregon, Vancouver, California. 



A remarkably pretty and well-marked species, very variable in color. 

 Docilis is based on a large si)ecimen in which lilac predominates. The 

 tine series before me j) roves its identity with the normal form ofperex- 

 cellens in which the pale colors are gray and yellowish. 



Group PITYCHROUS. 



Front full, produced into a navel-shaped, or wedge-like, projection, 

 Autennie of male serrate and bristled, of female entirely simple, rarely 

 ciliate. Anterior tibiie spinose, usually rather heavily armed at tip. 

 Thoracic vestiture often hairy, particularly in the male, seldom forming 

 definite tufts, but tending to an anterior divided tuft and loose basal 

 bunches. The primaries are somewhat variable in shape, but never 

 subequal, with rounded outer margin and apices ; usually they are 

 somewhat elongate, regularly widening outwardly, with rectangular or 

 somewhat produced apices. The maculation is usually more or less 

 confused, often decidedly variable, never clean cut and distinct. There 

 is no really topical form of marking, for everything tends to obsoles- 

 cence in greater or less degree. 



The genitalia are true to the bifurcate type of clasper, varying con- 

 siderably within a very narrow limit. Special or peculiar modifications 

 are noted under the specific name. 



The species of the group are not capable of separation into broad, 

 well marked sections, but split up into little aggregations of from two 

 to four. 



One of the largest of these series is separable by a broad black line 

 crossing the collar. 



Bicollaris has a strongly marked superficial resemblance to thee wjj«7a 

 group, which indeed misled Mr. Grote in his listing of the species. 

 The structural characters, however, are typical of the present group. 

 The color is clay yellow, the maculation rather indefinite. 



Brocha is entirely different ; the color is gray, with a more or less 

 marked rufous shade, i«ottle4 witia flpo t-rapsvers^ stfigre j the oHi- 



