ijo.1140. NORTH AMERICAN NOCTUIDAE— SMITH AND DYAR. 165 



the sides gray; patagiae black margined, the disk with black lines at 

 the side, and a smoky line through tlie middle. The primaries have all 

 the markings obscured by the black streakings, but somewhat traceable. 

 The basal line consists of an oblique black streak across tlie costal 

 space. The median shade is scarcely more. The transverse posterior 

 line may be traced across the wing as a series of strongly dentate 

 whitisli points, followed by black, defining spots. There is nothing 

 that can be called a subterminal line; but there is a pale shading, 

 beyond which a series of black rays extend through the terminal 

 space. Some of these rays cross the shading and extend inward to the 

 transverse posterior line. Between veins 1 and 2, and 2 and 3, this line 

 is actually crossed, and connection is made with the dusky shading 

 which extends to the base below the median vein. The veins them- 

 selves are a little white marked. Secondaries white in the male, a little 

 dusky outwardly; hardly darker in the female, but with a broader 

 dusky margin. Beneath powdery whit , a little darker in the female, 

 with a more or less obvious discal spot; but no outer line in any of the 

 specimens before me. 



Expanse, 1.72 to 1.88 inches (43 to 47 mm.). 



Habitat. — Arizona. 



This is a narrow winged species in which the primaries tend a little 

 to become lanceolate. The ordinary markings are all much obscured, 

 the dentate transverse posterior line being the only thing that is at all 

 traceable, and this is very characteristic. The ordinary spots are not 

 traceable in any specimen before me. The Colorado locality given in 

 my catalogue is probably an error, due to the fact that specimens of 

 harnesii were confused with this species. The head is of good size; the 

 front a little convex, but not bulging; the palpi reach to the middle of 

 the front. The anterior legs of the male are fairly well (Jeveloped; the 

 tibia rather stout and long in proportion to the femur, with the epi- 

 physis inserted a little below the middle and reaching to the tip. The 

 harpes of the male are moderate, rather evenly rounded at the tip. 

 The clasper is stout, the inferior projection short and beak-like, the 

 upper process forming a long curved hook, which gradually narrows to 

 the pointed tip. The upper process is more than twice as long as the 

 lower. 



ACRONYCTA EXTRICATA Grote. 



(Plates XIII, fig. 9, female adult; XVIII, lig. 15, leg; XXII, fig. 18, male genitalia.) 



Apattla exiricata Grote, Bull. U. S. Geol. 8iirv., 1882, VI, p. 575. 

 Mastiphanea exiricata Gkote, Papilio, 1883, III, p. 113. 



Ground color dark bhiisli gray, powdery, with more or less evident 

 smoky shadings. Head with vertex smoky; collar smoky or rusty 

 brown above. The patagiae with narrow smoky margins and the disk 

 with a smoky line on each side. Primaries witii the transverse mark- 

 ings obs(Hired in most specimens. Basal line niarki'd by an oblique 

 black dash on the costa. Transv^erse anterior line fragmentary, in 



