NO. 1140. NORTH AMERICAN NOCTUIDAE— SMITH AND DYAE, 163 



being the longest and most prominent; the others lessening toward the 

 apex. There is a broad black streak, extending from the base to beyond 

 the middle of the wing in the submediau interspace. There is another, 

 which almost tills the space between veins 1 and 2, and extends from 

 the median vein to the outer margin. The other interspaces are less 

 prominently black filled; but sometimes the powdering obscures these 

 rays, and the whole wing gets an indefinite mottled appearance. The 

 ordinary spots are wanting or very faintly indicated; the orbicular is 

 not present in any specimen before me; the reniform is small, somewhat 

 lunulate, and incompletely outlined in all but two of the nine examples 

 under examination. Secondaries white in the male, smoky in the 

 female. In both cases with a darker terminal line. Beneath white in 

 the male, smoky in the female; i)0wdery, with a more or less marked 

 discal spot and sometimes a trace of an outer line. 



Exi^anse, 1.50 to 1.84 inches (37 to 40 mm.). 



Habitat. — Colorado: Denver; Garfield County, 7,000 feet; Glen wood 

 Springs, Jane and July. 



All the specimens before me were collected by Mr. David liruce or 

 by Dr. William Barnes. There are six males and three females, the 

 latter being the larger throughout. Types are in the U. S. National 

 Museum, Ifutgers College, and with Dr. Barnes and Mr. E. L. Graef. 

 The only variation that occurs is in the amount of the black powder- 

 ing through the wings; otherwise it is very constant. The species has 

 been confused with edolata, than which it has broader, more trigonate 

 wings and a i)aler ground color. The head is moderate in size, the 

 front just a little bulging; the palpi well developed and reaching to the 

 middle. The legs are rather long in the male, with the femur evenly 

 developed, not particularly stout in the middle; the tibia is propor- 

 tionate, with the epiphysis inserted above the middle and not reach- 

 ing to the tip. The harpes are rather short and broad, (piite evenly 

 rounded at the tip. The clasper has the inferior process well devel- 

 oped, rather long and somewhat beak -like; the upper iirocess of mod- 

 erate length, more slender and well curved; it is not more than one 

 and one-half times as long as the inferior process. 



ACRONYCTA PERDITA Grote. 



(Plates III. fig. 6, adult: XVIII, fig. 16, leg; XXII, fig, 16, male genitalia.) 



Acronycia penlita Guotk, Can. Ent., 1871, VI, p. 151. 



Ground color a very dark bluish gray, the wings strongly sufiused 

 with black. Head blackish on the vertex. Collar, centrally black, the 

 sides being gray. The patagiae are black margined, while the disc has 

 a black line on each side and sometimes also in the center. The pri- 

 maries, although thoroughly suftused with black, still admit of tracing 

 all the ordinary markings. The basal line is very feebly indicated by 

 a pair of black dots on the costa. The transverse anterior line is gemi- 

 nate, strongly bent outwardly between the veins; as a whole nearly 



