530 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



The 9 listed has not been positively associated with the cf cf of 

 griseus griseus. 



In general, the complex species, griseus, is related to those acrolo- 

 phids having elongate labial palpi, but it is not closely related to any 

 one species. The structures on its head furnish the distinctive com- 

 bination of elongate labial palpi, naked eyes, and laminate antennae. 

 In addition, the harpe and aedeagus of griseus are distinct from those 

 of all other acrolophids. 



The subspecies, griseus griseus, differs from its close relative, 

 griseus capitatus, in having a considerably darker ground color in the 

 forewings, a differently shaped cucullus of the harpe, and a different 

 geographical distribution. 



Mr. Tams of the British Museum (Natural History) has sent me 

 photographs labeled '^griseus Wals., type," showing the adult cf 

 and 9 and their respective genitalia. These photographs easily 

 confirm the identity of this subspecies. 



Dyar (1900) listed the following distributional data for griseus: 

 "Oracle, Arizona, June 28 (E. A. Schwarz); San Diego, Texas, May 9 

 (E. A. Schwarz); Brownsville, Texas, Apr. 27 (C. H. T. Townsend); 

 Washington, D.C., July 20 (A. Busck)." The last reference, Wash- 

 ington, is obviously in error. Dyar further stated: "The Texas 

 specimens are pale, the ground color an ashy white, on which the dark 

 specks and streaks show plainly. The specimen from Oracle, Ariz., 

 is very dark, the black markings predominating." The pale specimens 

 from Texas, mentioned above by Dyar, are undoubtedly examples of 

 the following new subspecies, griseus capitatus. 



Meyrick described Acrolophus leucalladis as a new species in 1919. 

 He based his description on three specimens, including both sexes, 

 collected in July at Nogales, Arizona. The wing expanse was listed 

 at 19-20 mm. Since 1919 leucallactis has appeared in the literature 

 as a distinct species. 



The cf and 9 types of leucallactis are at the British Museum 

 (Natural History). Mr. Tams has sent me photographs showing all 

 three moths in dorsal aspect and the genitalia of the cf in ventral 

 aspect. These agree with the corresponding photographs represent- 

 ing Walsingham's older species, griseus, the cf and 9 types of which 

 are also at that institution. The two photographs of the genital 

 capsules of griseus and leucallactis are almost identical. There is 

 nothing in Meyrick's description of leucallactis to indicate that it 

 could not be griseus. Thus leucallactis Meyrick should be considered 

 a new synonym of griseus which is treated here as a new combination, 

 Acrolophus griseus griseus (Walsingham). 



