SOME AMERICAN GEOMETRID MOTHS CAPPS 137 



Genitalia (figs. 16, 16A) : Uncus rather short and stout, strongly 

 dilated basally; gnathos well developed, broad and with many very 

 fine spinules; costa of harpe straight or slightly convex; furca extend- 

 ing to or beyond costa of harpe ; distal dilation slight and gradual ; 

 aedeagus with a strongly sclerotized asymmetrical ventrodistal bifur- 

 cation (fig. 16A), also armed distally with a strongly sclerotized and 

 extenuated plate which is conspicuously broadened basally and sco- 

 bifiate along its margin; penis with a large patch of cornuti. 



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



Alar expanse, 37-45 mm. 



Genitalia (fig. 30) : Ventral operculum moderately sclerotized; 

 sclerotized band bordering ventral margin of genital opening narrow, 

 crinkled, anterior margin uneven ; signum a disklike plate with long 

 spinelike teeth. 



Type.— U.S.N .M. No. 55726. 



Type locality. — Arizona. 



Food plant. — Unknown. 



Distribution. — United States: Arizona, Cochise County (Mar- 

 May, June, July, Aug.), White Mountains near Rice (July). 



Thirty-eight specimens examined. 



Remarks. — The examples representing this species taken early in 

 the season (May) are more densely sprinkled with fuscous and no- 

 ticeably larger (43-45 mm. wing expanse) than those taken later 

 (June, July, Aug. Sept., expanse 32-38 mm.). 



2. BESMA SESQUILINEARIA CAVILLARIA (Hulst) 



Tctractis cavillaria Hulst, Ent. Amer., vol. 1, p. 203, 1880. 



Metancma 9 novellata Hulst, Ent. Amer., vol. 1, p. 204, 18S6. 



Therina cavillaria (Hulst) Hulst, U. S. Nat. Mus. Bull. 52, p. 335, 1903. 



Sabulodes novellata (Hulst) Hulst, U. S. Nat. Mus. Bull. 52, p. 346, 1903. 



Euchl-aena cavillaria (Hulst) Babnes and McDunnough, Check list of the 



Lepidoptera of Boreal America, No. 4695, 1917. 

 Destutia cavillaria (Hulst) McDunnough, Check list of the Lepidoptera of 



Canada and the United States of America (Part 1, Macrolepidoptera), No. 



5122, 1938. 



Male. — Similar to typical sesquiUnearia but averaging smaller, a 

 trifle paler, and the sprinkling of fuscous scales less intense. 



Alar expanse, 33-40 mm. 



Genitalia like those of typical sesquilincaria. 



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



Alar expanse, 35-40 mm. 



Genitalia like those of typical sesquilinearia. 



Types— -In Rutgers College collection (cavillaria) ; United States 

 National Museum {novellata, No. 34007). 



Type localities. — Arizona (cavillaria, novellata). 



