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 
Deltocephalus concentricus VanDuzee. Bull. Buffalo Soc. Nat. Sci., V, p. 20S. 
Thamnotettix 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 monticola. 
ATHYSANUS CURTISII PITCH. 
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, probably 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 
convexly 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. 
Larv 80 stout, with a large, convexly conical head. Of a deep 
yellow color, with eyes and antennse 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 larvae were found during July, becoming full grown and 
issuing as adults by the end of the month. Another brood of 
larvse 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. 
