222 IOWA ACADEMY OF SCIENCES. 



Var. a. Female: General color yellowish -white, meso-metathorax pale 

 yellow, basal joints of sntencffi concolorous with head, joint 3 and taseof 

 joint 4 dusky; the remainder of the antenniB and spot at distal end of 

 tarsi, brownisih-black; eyes dark red-brown; ocelli nearly colorless; inner 

 margins red; anterior wings indistinctly clouded with fuliginous at base, 

 distal portion clearer; brown markings as follows: A clearly defined 

 saddle-shaped patch on posterior portion of prothorax, concave along its 

 front border, nearly interrupted by a wedge-shaped incision extending 

 forward from posterior border: anterior border of mesonotum; scutellum 

 except median stripe; bands at base of abdominal segments two to seven, 

 dilated at sides, and narrower and fainter along intervening space; patch 

 on upper side of all the femora, darkest on posterior pair. 



One specimen, taken en clover August 14, 1893, and one 

 on hackberry, October 6, 1893, Ames, Iowa. 



Anotiier specimen taken on hackbsrry, October 6, 1893, at 

 Ames, Iowa, corresponds with the description of variety a 

 except that the thorax is a deeper yellow. 



Another specimen taken oa elm, August 21, 18M, is more 

 uniformly yellow, the anterior wings more unifoimly dusky, 

 bands at base of abdominal segments narrower and other 

 markings fainter. 



A fourth specimen that may be placed in this group resem- 

 bles the first, but it is of a deeper yellow color; the markings 

 on the prothorax are prolonged farther backward, and the 

 wings are more uniformly fuliginous. Ames, Iowa, Oct. 8, 1893. 



Var. b. Male and female: Body pale yellowish, immaculate; apical 

 joints of antennse black, remainder pale; wings and fringes tinged with 

 yellowish. 



Hawthorn and hackberry, Ames, Iowa, October 6, 1893. 



Var. c. Male and female: Wings nearly uniformly fuliginous; last 

 three joints antennae, distal half of joints 4 and 5 black, sometimes inter- 

 mediate joints altogether dusky; brown markings very distinct, confined to 

 two large spots on thorax and scutellum respectively, the latter oblong and 

 approximating posteriorly; abdomen immaculate. 



Hawthorn and hackberi-y, October 6, 1893, Ames, Iowa. 



Var. d. Male and female: This variety is characterized by having the 

 wings fuliginous, trifasciate with white bands, and in being more heavily 

 marked with brown; the markings on the thorax and bands at base of first, 

 second and third (sometimes of second and third only), and seventh and 

 eighth segments of the abdomen are extended until they coalesce and form 

 broad bands; the dorsal surface of the head is brown; sometimes all of the 

 caudal segments are brown; the legs are white, with brown streaks on 

 dorsal surface of femora, and frequently on tibias also; antennae as in pre- 

 ceding variety. 



