IOWA ACADEMY OF SCIENCES. 177 



DIEDROCEPHALA NOV.EBORACENSIS FITCH. 

 Aulacizes novcebor-accnsis Fitch. Homop. N. Y. State Oab., p. 56, 1851. 



This is a larger and lighter colored species than moUipes, and 

 may be further distinguished by the blunter head and the two 

 black spots at the tip. It has been found to occur only in 

 sloughs or ia heavy grass adj icent to them, especially slough 

 grass {Spartina cynosuroides). 



Tne adults were taken through the last of June and through 

 July, and again from the middle of August through September. 

 It seems to be decidedly limited in its range of food plant, and 

 would be of little economic importance except where slough 

 grass is used for hay. 



DIEDROCEPHALA COCCINBA FORST. 

 Cicada cocclnea Forst. Nov. Species Ins , p. 96, 1781. 



This is the brightest colored species of the genus occurring 

 at Ames, and is intermediate in size between mollipes and novce- 

 boracensis. 



The vertex and scutellum are bright yellow. The pronotum 

 is variously marked with green, red and yellow. The elytra 

 are bluish-green, with two broad purple stripes, and a narrow 

 yellow margin. Below, all yellow, except a narrow black line 

 just under the vertex. Length, nine to ten mm. Readily sep- 

 arated from versuta by the absence of dark markings on the 

 vertex, and the larger siza. 



The larv86 are of a pale yellow color throughout. Head 

 much inflated, convexly pointed, resembling that of adult but 

 larger; thorax broad, abdomen long and slender. The pupas 

 are still lighter colored, and have a scarlet mark on each wing 

 pad. 



This species is two-brooded. The larvae were taken nearly 

 full grown about the 1st of June. Adults were taken from 

 about the middle of June through July, and again through Sep- 

 tember and Octobar. 



They were taken from woody regions, but usually swept 

 from the undergrowth of grass and weeds. Adults of the 

 second brood were taken from coarse grasses long after the 

 trees had shed their leaves. 



XEROPHLOEA VIRIDIS, FABR. 

 (Pi. xix, Fig. 1.) 



This grotesque species occurs throughout the entire United 

 States at least. Van Duzee reports itfromNew York to Florida, 



