IOWA ACADEMY OP SCIENCES. 207 



one-third the way back from the point, white; vertex light margined, 

 except posteriorly. 



Puppe with oblique mark and spot in lateral white line present but 

 obscure. Below, as in reBexus, dark marks nearly black. 



This is the smallest species of the reflexus group; this and its 

 cinereus color will enable one to separate it irova. pectinatus to 

 which its dark face allies it, and which separates it from reflexus, 

 or it may be readily separated from either by its genitalia. It 

 has been collected abundantly at Ames, but it is not known from 

 any other locality, although doubtless it will be found to occur 

 with the other members of the reflexus group throughout the 

 range of the Bouteloas. 



Adults and full grown larvaB were first taken in company 

 with the preceding species from Bouteloa Inrsuta August 4th 

 and 8th, 1896. By the middle of the month larvae had disap- 

 peared, adults continuing numerous throughout the month and 

 on until the middle of September. The spot where this species 

 was found was a high gravelly pasture, the tops and sides of 

 the knolls being covered with this grass, to which it seemed 

 strictly confined. 



DELTOCEPHALUS OCELLARIS FALL. 

 Cicada ocellaris. Fall. Hem. Suec, II, p. 30, 13 (Vide Melichar). 



This is a much stouter and darker species than saiji, occurring 

 commonly throughout central Europe, and has been received 

 from Colorado. The vertex is much broader than in sayi; width 

 between eyes nearly equaling length; pronotum very short; 

 elytra very broad; nervures strong; clavus reticulated, central 

 anteapical usually unequally divided. Color much darker than 

 in sayi; light markings on vertex variable, not concentric; face 

 dark, an inverted white T on apex of front; venter and geni- 

 talia shining black. Readily separated by the immense, con- 

 vexly inflated shining black valve and the large, convexly 

 margined plates of the male. Length, 3.50 mm. Width, 1.50 

 mm. The Colorado specimens were taken by Professor Gil- 

 lette in Laramie county, July 5th. 



DELTOCEPHALUS SAYI FITCH. 



(PI. xxiil, Fis- 3.) 

 Amhhjcephahw sayi Fitch. Homop. N. Y. State Cab., p. 61. 

 Jassus sayi Walk. Homop. IV, p. 1158, 1852. 

 Deltocephalus sayi Uliler. Bull U. S. Geol. and Geog. Surv., IV, p. 511, 1878. 



This species may be swept sparingly almost everywhere, but 

 occurs throughout the summer in immense numbers on blue 

 grass in woody pastures, either high or low. 



