38 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Group AURICOMA. 



1. All tlifi ordinary iiiaculation present, but not contiastiDg; no longitudinal streaks, 



dashes, or dagger marks; i)rimaries elongate, subeijual 2. 



All the ordinary niaculation present, more or less mottled and contrasting, tend- 

 ing to suffusion ; primaries short and trigonate 3. 



The ordinary maculation more or less obseured, tending to biconie more distinetly 

 strigate; wings long, trigonate, tending to or becoming lanei'olate. ..4. 



2. Dull gray, with dense black powderings obscuring the maculation; secondaries 



grayish white iliita. 



Brighter gray, ])riniaries with 8i)ar8er powderings and all the maculation clear; 

 both wings with a yellowish suffusion, most marked in secondaries. 



liifricoiiia. 



3. Even, pale, powdery gray, without a black basal dash or streak, and with no 



contrasting maculation speraia. 



Marbled black and white; the maculation contrasting nociivaga. 



Primary gray, more or less mottled; basal black streak present. 



Dark Iduish gray, the maculation not prominent; secondaries soiled white 



in the male, smoky gray in female emacidata. 



Paler gray, with a slight yellowish tinge on both wings, the markings well 

 relieved and the ])rimaries, therefore, with a mottled appearance. 

 Somewhat broader winged and the primaries less pointed at tij); trans- 

 verse anterior lint; in female always well marked imprcssa. 



Narrower winged and the )>rimaries more pointed at tip; transverse 

 anterior line in female obscured by a dusky shading which extends 

 from base to the anal angle (lislaiis. 



4. The primaries so strigate as to appear blacki.sh and the transverse maculation 



obscured 5. 



The i»rimaries ash-gray, not prominently strigate; transverse maculation dis- 

 tinct; an obvious dagger mark opj)08ite the anal angle 6. 



Th(^ ])rimarie8 almost Avhite, with black powderings, in form lanceolate and 

 without a dagger mark oppositii the anal angle 7. 



5. All the maculation obscured, and only the reniform sometimes tvaceiihla .harnefiii. 

 Transverse posterior line fairly evident and lunulate; secondaries of lemale 



dusky perdita. 



Transverse posterior line evident and very strongly dentate; secondaries white 

 in both sexes edolafa. 



6. A distinct black basal streak; transverse anterior line obscure or wanting; 



transverse posterior line strongly denticulate cxtricata. 



No black basal streak; transverse anterior line usually evident; transverse pos- 

 terior lint! not strongly denticulate xiiUniformin, 



7. Grayish white, powdery; transverse posterior line lunulate; a series of black 



terminal dots ohIhiUa. 



Bluish white, less powdery in appearance; transverse posterior line an even, 

 continuous brown shading; no black terminal dots lanciolaria. 



Group AMERICANA. 



The species united in this gronp find their most important common 

 featnre in the sexnal characters of the male. In all cases the harpes 

 or sidepieces are broad, ronnded at the tip, and the clasper consists of 

 a single long hook, which arises directly ont of the membranous side- 

 piece nuicli nearer to the base than to the middle. There is hardly any 

 material variation in this jjlau of structure, and, while there are differ- 



