546 



CALIFORNIA ACADEMY OF SCIENCES. 



illoia type. 

 . Wiugs saflfrou as far 

 as the nodns. 



b. Front wiugs with a 

 black basal streak in 

 subcostal space to be- 

 yond first antecnbital. 



c. Hind wings with two 

 black basal streaks, one 

 in subcostal space to 

 about as far as second 

 antecnbital, the other 

 in the median s^sace to 

 the cross-vein. 



Hab. California, Nevada. 



virgula. 

 a. As far as the nodus. 



b. Vestige of a basal 

 streak on front wings. 



% Black, basal streak 

 in subcostal space 

 nearly to first antecn- 

 bital, that in median 

 space very short. 



Hab. Oaxaca, Vera Cruz, 

 Putla — Mexico; Santa 

 Clara — Cent. Am. 



gilva. 



a. As far as the trian- 

 gle* on hind wings, 

 not so far on front 

 wings, and only in 

 subcostal and median 

 spaces. 



b. No black basal streak 

 on front wings. 



c. Only one black basal 

 streak, viz. : in sub- 

 costal space hardly 

 reaching first antecn- 

 bital, or less. Reticu- 

 lation more blackish 

 than in illoia type 

 and virgula. 



Hab. Colombia, Venez- 

 uela, Ecuador. 



Of these three forms, Baron de Selys says, "I am per- 

 suaded that the three forms pertain to a single species 

 (illota), several examples showing intermediate charac- 

 ters." This statement is borne out by the specimens 

 from Baja California, as here shown, the number before 

 each -|- sign indicating individuals from Mesa Verde, that 

 after the -f sign those from Sierra Laguna. 



Agreeing throughout with virgula t ^ -\- \ ^ . Abd. 22 

 mm., h. w. 26.5. 



Agreeing with virgula in a (for hind wings) and c, 

 with gilva b. i 3 -f- i ? . Abd. 6 23, ? 23.5, h. w, $, 28, 

 $29. 



Agreeing with virgula a (for hind wings), and gilva 

 b, c. 26+36- Abd. 22.5, h. w. 27.5. 



Agreeing with virgula b, c, gilva a, 2 S + • Abd. 22.5— 

 24, h. w. 27-29. 



*The original text has "quadrilateral," perhaps an error for "triangle." 



