220 IOWA ACADEMY OP SCIENCES. 



antennae; the spots on the vertex more or less united and merged into 

 bands connecting with the oblique bands on the disk; in the darker forms 

 the front is roundingly inflated, the margins continuous with that of the 

 clypeus; clypeus broadest below. The dark markings on the front 

 heighten this appearance by rounding away from the sutures above on the 

 front and expanding on the clypeus below. While these two forms are 

 fairly constant they so intergrade in structure and color as to render 

 separation impossible. Late specimens of the green form being often 

 similarly marked and even more highly colored than early ones of the 

 fuscous form; while early examples of the fuscous form often possess a 

 venation even weaker than that of the green form and would be readily 

 mistaken for Cicadula. Moreover, there is no distinction in the lar\ae 

 which produce them. 



Larvae: Form nearly that of Eavocostatus; slightly narrower and more 

 elongate, approaching those of exitiosa. More distinctly yellow than those 

 of D. ocellaris, unmarked except two black dots on the margin of the 

 vertex midway between the eye and the tip and a pair of oblique dashes on 

 the disk of the vertex. The pupae have in addition to these three spots on 

 the anterior margin of the wing-pads and a number on the posterior half 

 of the disk more or less definitely arranged in transverse rows. 



A very widely distributed and abundant species. Specimens 

 are at hand from New York, Maryland, Mississippi, Louisiana, 

 Illinois, Iowa, Colorado and California. 



DELTOCEPHALUS ARGENTEOLUS UHL. 



Delocephalus argenteolus Uhler. Bull. U. S. Geol. and Geog. Surv., Ill, p 473, 187". 

 Athysarms curtipennis Gillette and Baker. Hemiptera of Colorado, p. 92. 

 Eiitetti.r terebrans Gillette and Baker. Hemiptera of Colorado, p. 102. 



The short winged forms of this species are very close to the 

 European species of the genus Doratura. 



D. MONTICOLA G. AND B. 

 Hemlp. Col. p. 88. 



This is a good Daltocephalus, but specimens cime too late to 

 allow of its insertion in the synopsis. It would follow D. 

 minimus, which it 3losely resembles in size and coloration, but 

 from which it is readily separated by the presence of a distinct 

 median tooth on the last ventr al segment of the female. 



DELTOCEPHALUS MINUTUS VAN D. 

 Entom. Amer. VI, p. 96, 1890. 



This species was described from a long- winged male, but it 

 occurs in both long and short- winged forms very abundantly. 

 The short-winged examples apparently fall into the genus 

 Doratura. 



DELTOCEPHALUS OSBORNI VAN D. 

 Trans. Am. Ent. Soc, XIX, p. 304, 1892. 



This species should be placed in Athysanus and close to 

 extrusus. 



