REVISION OF SPECIES OF THE GENUS ACKOTIS. 67 



if not quite, equal in size to occulta, and with practically the .same 

 markings; the jj;rou nil color of the i>iiniaiie.s, however, is red brown, 

 and the secondaries are I'uscous brown. Tiie S genitalia have been 

 examined in only a single specimen, and that but superficially with a 

 lens. From such examination they appear much liki' those of occulta. 

 Grandipcnnis, though ex[)anding scarcely more than saucia, is some- 

 what wider winged, and is referable at once to the large species. The 

 color is an even yellowish brown, the costa marked with a yellowish 

 tinge, maculatiou fainc. The secondaries are very ])ale yellowish. 

 The S type from Mr. NeuuKjegen's collection was the only specimen 

 examined, and could not, of course, be dissected or broken to examine 

 the genitalia. From outward examination the hari)es are almost 

 evenly oblong, a small superior projection similar to that of occulta 

 from the tip. The clasper was invisible. 



The remaining, smaller species, in which the thoracic cresting is 

 most marked, are also easily distinguished, iiaucia is so common and 

 so universally known that no special characterization seems needed. 

 Unica is distinguished by the i)ale grouiul color and very distinct 

 transverse lines. The $ genitalia are very distinctive, the harpes are 

 long, concave, somewhat dilated, and ladle-shaped toward the tip ; a 

 row of spines project inwardly at tip. The clasper is short, corneous, 

 acute, and but slightly bent. The variety agrees perfectly with the 

 species in this respect. The remaining species, rudens and pellucidalLs, 

 agree in having iridescent, white secondaries and creamy, or somewhat 

 l)ur{)lish gray i)rimaries; they are also i)erceptibly smaller than either 

 of the other species. Inter se they differ in that rudens has a black 

 basal dash and a black connecting lino between the ordinary spots, 

 both of which are wanting in j>t'//MC'/V/rt/is. The S genitalia are practi- 

 cally identical. The harpes are moderately broad, suddenly and deeply 

 emarginate near tip on lower edge, giving the terminal portion a bent 

 ladle appearance. Inwardly at tii) there is a row of short acute spines. 

 The clasper is rather short, corneous, acute, and but slightly curved. 



SYNOPSIS OF" SPKCIES 



Size l.arg*', thoracic, tnftiiigs not pioiiiiuent. 

 Primaries j^ray. 



Secoti(larie« l)Iackisli, size larjijer 0('«ulta. 



Secondaries fuscous, size smaller riM:KiXA. 



Primaries red brown. 



Ordinary spots larj^e; transverse maculatiou distinct astkicta. 



Ordinary spots small ; transverse maculatiou obsolete guanditennis. 



Size smaller, tlioracic tuftinj^s very distinct. 

 Color yellowish to blackish. 



Transverse lines usually punetiform, indistinct, ordinary spots obscured by darker 



iitoms, all maculatiou obscure .saicia. 



Color creamy or purplish gray. 

 Primaries with a black basal dash and a black connecting line between the or- 

 dinary spots RIDENS, 



Primaries without basal daah or counectiug line pellucidalis. 



