SOME AMERICAN GEOMETRID MOTHS CAPPS 145 



very thin, translucent, uniformly pale whitish, ocherous and without 

 transverse lines, and discal or subterminal dots. 



Alar expanse, 28 mm. 



Genitalia (figs. 19, 19A) : Harpe simple ; uncus a strong hook, dilated 

 basally ; gnathos stout, with numerous coarse spines ; f urea not strongly 

 compressed, length slightly less than width of harpe at base; spi miles 

 on the dorsal surface of furca essentially like those of gnathos; anellus 

 weakly sclerotizecl, scobinate; penis without cornuti. 



Female. — Similar to the male in color and markings. 



Alar expanse, 32 mm. 



Genitalia (fig. 29) : Ventral operculum moderately sclerotized; 

 ventral margin of genital opening not sclerotized; posterior internal 

 band extending about one half the length of the ductus bursae ; bursa 

 copulatrix bulbous; signum a strongly sclerotized reniform plate with 

 two prominent spines. 



Type.— U.S.N.M. No. 11874. 



Type locality. — Southern Arizona. 



Food plant. — Unknown. 



Distribution. — United States: Arizona. 



Three specimens examined. 



Remarks. — Except for the somewhat duller appearance of the wings, 

 the examples of hyalinaria are indistinguishable from some of those 

 of blandaria, which is discussed next. 



2. EVITA HYALINARIA BLANDARIA (Dyar) 



Therina blandaria Dyar, Proc. TJ. S. Nat. Mus., vol. 51, p. 27, 1916. 



Male. — Similar to hyalinaria in habitus. Color and maculation va- 

 riable, ranging from forms that are conspicuously sprinkled with 

 fuscous, with two (sometimes obscure) transverse lines on the fore 

 wing, the lines slightly curved and rather diffuse and with a similar line 

 on the hind wing appearing as a continuation of the transverse posterior 

 of the fore wing, to forms that are a uniform pale ocherous with the 

 wings rather clear and transparent, the surface appearing somewhat 

 glazed and the markings obsolete. 



Alar expanse, 26-31 mm. 



Genitalia like those of typical hyalinaria. 



Female. — Similar to the male in color and markings. 



Alar expanse, 27 mm. 



Genitalia like those of typical hyalinaria. 



Type.— U.S.N.M. No. 18882. 



Type locality. — Popocatepetl Park, Mexico. 



Food plant. — Unknown. 



Distribution. — Mexico: Popocatepetl Park (June, July), Cuaji- 

 malpa. 



