64 IOWA ACADEMY OF SCIENCES. 



Vertex slightly convex except before the apex, slightly acutely 

 angled, inai'gins rounding to the acute apex, two-thirds the length 

 of the prunotum. Face distinctly convex as seen from side, the 

 front broad. Elytra long, narrow at tbe apex, the apical cells long 

 and narrow — the second one especially so, outer anteapical cell 

 acuminate anteriorly. 



Color; face and vertex yellow, separated by a broad black band, 

 striated just below the margin, a line on either side extending in 

 on the suture, sometimes angled to the ocellus. Pronotum reddish, 

 a narrow band on the anterior margin in the middle, a broad 

 median stripe extending in from the posterior margin, connected 

 behind with a pair of oblique stripes from the humeral angles, deep 

 green. Scutellum yellow, impressed line often dark. Elytra red, 

 the costal margin, the sutural margin before the middle, the claval 

 suture and a median stripe on corium, green, the appendix black, 

 legs and below yellow. The black margin to vertex continued 

 across eye and under the margin of pronotum. Sometimes the 

 vertex and scutellum are washed with red or the green stripes on 

 pronotum coalesce leaving only a spot on either side of the disc, 

 red . 



Genitalia; female segment nearly twice as long as the preceding, 

 posterior margin acutely rounding back to the lateral margins. 

 Male plates long triangular, concavely attenuate, two-thirds the 

 length of the pygofers nearly half longer than the ultimate segment. 



Specimens have been examined from Ontario, New 

 Hampshire, Vermont, New York, Connecticut, District of 

 Columbia, Georgia, Alabama, Tennessee, Florida, Ken- 

 tucky, Mississippi, Ohio, Illinois, Iowa, Michigan, Minne- 

 sota, Missouri, Nebraska and Kansas. It ranges from 

 Canada and Maine to Florida, west to central Nebraska 

 and Kansas, and south to Mississippi and Texas and on to 

 Mexico and Central America. 



DiEDROCEPHALA VERSUTA Say. Plate VI, Figs. 3, 4, and 5. 



This is another very variable species in color markings 

 and somewhat so in form. Nearly all gradations between 

 these three varieties will be found but the following key 

 will readily place all the specimens examined in their cor- 

 rect variety. 



A. A black band on anterior margin of vertex versuta Say. ^ 



AA. The anterior margin of vertex without a baud, a black spot 

 at apex. 



B. A pair of black spots against eye in front sometimes 

 wanting, a few fuscous arcs on margin but not reach- 

 ing spot at apex lineiceps Spin.'© 



