2‘26 
[October 
yellowish-white, and the lower f of the nodus, the origin of the nodal sector 
and very conspicuously the entire length of the principal sector are yellowish- 
white, as in . All the other veins above and below black. Pterostigma yel¬ 
lowish-white, 2—2^ times as long as wide and surmounting IJ—2 cellules. An- 
tecubitals 20—24; postcubitals 19—23. Cross-veins of basal area (front wing) 
6—9; of quadrilateral (front wing) 7—11. The abdominal appendages 9 are 
3-5th as long as joint 10, robust, conical, yellowish, with their tips excurved 
and their extreme tips blackish. 
Length % 45—46 mill. 9 38^—43 mill. Expanse % 57—58 mill. 9 58—64 mill. 
Abd. ^34^—38 mill. 9^0—34 mill. Front wing30 mill. 9^^—32 mill. Hind 
wing % 28i—29 mill. 9 28^—30 mill. 
Three % , three 9 ; rare. One 9 was sent me by Mr. Uhler as 9 of 
americana ; the other S S 9 $ occurred on Rock River, Illinois, from 
the beginning of July to the end of August; one % and one 9 very 
mature. Although none were taken in coitu^ yet the very remarkable 
and conspicuous whitishness of the principal sector on its inferior but 
not on its superior surface, no traces of which are met with in % ameri- 
cana, sufficiently proves that this 9 does not belong there; and as only 
three % forms occurred on Rock River during a careful search of many 
weeks, viz. americana,^ rupamnensis pseudamericana., and the 9 of 
rupamnensis is known with certainty, this 9 ^^aay be confidently corre¬ 
lated with % pseudamericana. Differs from all described Hetserina 
but texana n. sp. in the whitishness of the principal sector beneath. 
In pseudamericana the basal spot of the % front wing is particolored; in 
americana and hasalis it is unicolored. In pseudamericana the carmine- 
red part of the basal spot in the % front wing does not extend so far 
forwards even as the basal area; in americana and hasalis the carmine- 
red basal spot of the front wing extends to the costal edge, basally in 
the former, nearly for its whole length in the latter. This species dif¬ 
fers also from americana and hasalis in the pterostigma of both the 
mature and the immature % being yellowish-white. The superior % 
appendages scarcely differ from those of americana Fabr., Walsh,* ex¬ 
cept in the laminiform tooth being much larger and the tubercle 
behind it smaller, and in the tubercle on the superior base of the 
laminiform tooth being smaller and more indistinct. 
The Monographic (p. 97) lays it down as one of the characters of the 
subgenus Hetserina, that in the front wing of S “ the postcostal area 
* For americana read scelerata n. sp. See Appendix. 
