IOWA ACADEMY OF SCIENCES. 221 



DELTOCEPHALUS SIMPLEX VAN D. 

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



This and the three following species should be placed in the 

 genus Thamnotettix. 



DELTOCEPHALUS COQUILLETII VAN D. 



Entom. Amer., VI, p. 95, 1890. 



D. CONCENTRICUS VAN D. 



DeltoceTplialua concentricus VanDuzee. Bull. Buffalo Soc. Nat. Sci., V, p. 208. 

 Thamiujtettix flavomarginata Gillette and Baker. Hemiptera of Colorado, p. 96. 



D. BIMACULATUS G. AND B. 



D. bimaculatus Hemiptera of Colorado, p. 86. 



D. flavovirens, G. and B. Hemiptera of Colorado, p. 87. 



DELTOCEPHALUS UNICOLOROUS G. AND B. 

 Hemiptera of Colorado, p. 89. 



Probably an immature specimen of their nionticola. 



ATHYSANUS CURTISII FITCH. 

 Amblycephalus curtisii Fitch. Homop. N. Y. State Cab., p 61, 1851. 



This species is the best known and the most widely dis- 

 tributed member of the genus occurring throughout the Eastern 

 States and Canada, and as far west as Michigan and Iowa at 

 least, probaVly to the mountains. The adult is three and one- 

 half millimeters in length by one and one-half broad, with the 

 vertex scarcely longer than the width of the pronotum, obtusely 

 con vexly pointed; elytra exceeding the short ovipositor; color, 

 vertex yellow, with large round spots before the middle, and 

 tip black; face yellow, an oblique black band extending from 

 either eye to the base of the clypeus, then prolonged narrowly 

 to the tip, forming a Y-shaped mark; the pronotum yellowish- 

 green, with a black crescent, anteriorly; elytra dark, nervures 

 yellowish-green. 



Larvae stout, with a large, convexly conical head. Of a deep 

 yellow color, with eyes and antennae dark. The body is cov- 

 ered with long stout hairs. 



This species is confined strictly to blue grass in meadows 

 and wooded pastures, where it rivals D. sayi in abundance. 

 First collected this season, June 17th, as adults in abundance; 

 the larva? were found during July, becoming full grown and 

 issuing as adults by the end of the month. Another brood of 

 larvoe matured during September, the adults continuing through 

 the rest of the season, becoming scarce by the last of October, 

 when a dissected female showed one fully developed egg, the 

 rest probably deposited. 



