616 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



May 11, 1926, J. O. Martin). Mexico: Angeles Bay, Gulf of California, cf (May 

 4, 1921, abdomen and genitalia missing, E. P. Van Duzee). 



Remarks. — This species was presumably named after its type 

 locality. A. pyramellus is related to those species having short labial 

 palpi, naked eyes, simple antennae with segments encu'cled by rings 

 of scales, simple uncus, and fused gnathos. It may be easily distin- 

 guished from the other members of the genus by its characteristic 

 harpe and aedeagus. The genital characters of pyramellus are con- 

 sistent throughout my series of thu'ty specimens. 



I have examined the type cf specimen at the U.S. National Museum. 

 It has recently been assigned a type number during the course of this 

 revision. It is labeled " Eulepiste pyramelliis B. & McD., Pyramid 

 Lake, Nevada." This specimen exhibited a moderate amount of geo- 

 graphical variation in comparison to the material I had previously 

 seen for this species. Dr. Clarke removed the genitalia of the type for 

 me and the identity of pyramellus was thus confirmed. In addition, 

 my examination of a slide preparation of the cf genitalia of a "cotype," 

 also from PjTamid Lake, fm-ther confirmed the identity of this species. 



Contrary to the brief comment accompanying the original descrip- 

 tion of this species, pyramellus is neither closely related to nor an 

 intermediate between hirsutus {pseudohirsutus) and occidens. In the 

 past, Busck and other workers have sometimes confused pyramellus 

 with kearfotti. 



30. Acrolophus laticapitanus (Walsingham) 



Figures 144-149 



A group of 69 male specimens, 59 from California and 10 from 

 Ai^zona, presents a complex of four subspecies and one form. In- 

 volved in this complex are laticapitanus, unistriganus, occidens, flavi- 

 comus, and leopardus, all of which have been considered as distinct 

 species up to the present tune. There has been very little previous 

 suggestion that any of these "species" are even closely related. In- 

 formation received from the British Museum regarding laticapitanus 

 and a study of the type material representing the other four "species" 

 at the U.S. National Museum show that unistriganus is a synonym 

 of laticapitanus and ih^it jlavicomus is a synonym of occidens. In addi- 

 tion, leopardus should be considered a form of occidens, since both 

 occur in the same locality. Lastly, added to the complex are two 

 subspecies, heinrichi and clarkei, described below as new. 



The enth'e group is bound together by almost identical genital 

 structure, except for the rather unstable cucullus of the harpe. Even 

 the most specific organs, the aedeagus and its unarmed vesica (fig. 

 146), exhibit but little variation throughout the complex. The 

 aedeagus may show some variation in respect to curvature and sinua- 



