200 IOWA ACADEMY OF SCIENCES. 



gg. Vertex little more than right angled ; 

 species, brownish fuscous, with light 

 neivures, male valve large, obtusely 

 rounding, feaale spgment deeply 



notched cine7-eu8. 



CO. Elytra broadly overlapping at the tip, central anteapical cell 

 elongate, constricted, distinctly longer posteriorly than the 

 cells on either side, longer than the other discoid cell. 



d. Vertex orange yellow, general color yellowish, styles dis- 

 tinctly exceeding the long plates auratus. 



dd. Vertex light fuscous with brownish maculatlons general 

 color fuscous, styles not visible beyond the short, broadly 



truncate plates signatifrons . 



A A. Vertex short, disk convex, margin in front of the eyes arcuated, tip bluntly 

 produced; ocelli below the disk of the vertex in front of the middle of the 

 eye. 



BBB, Pronotum long, distinctly angled behind, side margins long; species 



dark maculate or black; aseries of small pointson the anterior margin 



of the vertex, between the ocelli. Known larvte margined or banded. 



c. Clavus with a series of reticulations between the outer nerve 



and the suture; species fuscous, with black points on the vertex, 



elytral nervures light. 



d. A pair of large, round, black points on anterior margin 

 of each, vertex, pronotum and scutellum; length four 



mm inimicus . 



dd. Points small, usually confined to the vertex, species 

 shorter, length three mm. 



e. Elytra distinctly longer than abdomen, vertex 

 acutely produced in the middle; male plates con- 

 vexly pointed, width at middle two-thirds their 



length weedi. 



ee. Elytra about equaling abdomen, vertex more 

 obtusely rounding, male plates concavely atten- 

 uate, four times as long as width In the middle.. 



compactus. 



cc. Olavus without reticulations along suture; species black, with 

 white points on vertex, outer two apical veinlets white, costa 

 yellow flavocostatus 



DELTOCEPHALUS BILINEATUS G. & B. 

 Hemiptera of Colorado, p. 85. 



This species is very closely related to the European D. for- 

 mosus, and like it, is very variable in color, ranging from almost 

 black through disfcinctly b]a.ck-striped forms to red-striped 

 forms with black spots, and even on to those in which the black 

 is almost wanting. It may be readily distinguished, whatever 

 its color, by the reflexed white veinlets and its narrow elongate 

 frcnt. The dorsal stripes are always indicated, though vari- 

 ously colored and spotted. The general ground color beneath 

 is some shade of yello\v and the long f)lates of the male are 

 broadly black tipped. This species was described from Colo- 

 rado and has been collected at Ames, also in New Hampshire 

 by Professor Weed. The Iowa specimens were taken in July 

 from the undergrowth in a woody pasture where Scaphoideus 

 jucundus occurred, which species it sometimes closely mimics. 



