582 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



Monument, July 29, 1924, 3 &&, J. O. Martin, 2 cf cT^, E. P. Van 

 Duzee, August 12, 2 cf cT, J. O. Martin; Badger, Santa Cruz Co., 

 Ariz., July 31, 1924, 2 cf cf', E. P. Van Duzee, 1 cf and 1 9, 

 J. O. Martin; Patagonia, Santa Cruz Co., Ariz., August 2, 1924, 

 2 cTcf, E. P. Van Duzee. This subspecies may be distinguished 

 from the others of the macrogaster complex by its laminate antennae, 

 from which the name is derived. The subspecific name, laminicornus, 

 is derived from the Latin words lamina, meaning "a thin plate," and 

 cornu, "a horn." 



16. Acrolophus baldiifi, new species 



Figures 90-94 



Male. — Head, labial palpi, and antennae whitish-ochreous. Labi- 

 al palpi intermediate in length, recurved back over head and extend- 

 ing onto anterior margin of thorax, diverging rather strongly from 

 head and from each other distad; clothed with very slender, elongate 

 scales. Eyes rather small, sparsely and finely setose, heavily lashed 

 and partially concealed by elongate setae. Antennae strongly uni- 

 pectinate, covered dorsad with scales; segmental processes large, 

 subcircular, platelike, finely ciliated, rather slender and broadly spaced 

 from one another in lateral aspect. Thorax ochi-eous tinged with 

 fuscous. Forewings with coloration somewhat variable, gi'ound color 

 grayish- white irregularly sprinkled with fuscous; brownish to fuscous 

 markings in form of short bars along costa, narrow band sharply 

 alternating between gray and brown along apical margin, spot at 

 outer end of cell, and prominent fuscous patch in basal third on and 

 beneath fold. Hindwings brownish, with margins and fringes alter- 

 nately gray and brown. Legs and abdomen pale brown. Wing 

 expanse: 18 to 22 mm. 



Female (association tentative) . — General coloration similar to that 

 of cf although slightly paler and with pattern less distinct. Labial 

 palpi short, extending only slightly beyond antennal bases, closely 

 appressed to head but well separated from each other, rather sparsely 

 clothed with slender scales. Eyes similar to those of cf except less 

 heavily lashed. Antennae simple, covered dorsad by scales, segments 

 globose. Wing expanse: 26 mm. 



Male genitalia. — Vinculum atypical, considerably reduced; for 

 most part appearing simply as rather weakly sclerotized, subcircular, 

 ventral plate; areas of fusion with lateral arms of tegumen produced 

 into pair of ventrolateral, subdigitate processes. 



