178 IOWA ACADEMY OF SCIENCES 



Texas, Colorado, and California. In addition to this, speci- 

 mens are at hand from Oregon, Utah, Arizona and Nebraska, 

 and it has been collected at Ames rather commonly. 



The adults are six or seven millimeters long by two millime- 

 ters wide across the pronotum; the head is slightly narrower 

 than the pronotum; eyes small; vertex flat, produced and round- 

 ingly angled in front, anterior margin very thin. The elytra 

 are long and angularly pointed behind, the claval area is nearly 

 flat while the corium is strongly deflected, becoming perpen- 

 dicular at the tip, giving the insect a wedge-shaped appearance. 

 The entire dorsal surface is coarsely pitted. The females are 

 bright green with the tips of elytra lighter, sometimes clouded 

 or minutely dotted with darker along the margins; the males 

 have in addition a broad median smoky line on the vertex and 

 an irregular transverse dark band on the pronotum more or 

 less strongly margined with lighter before. 



Genitalia: The last ventral segment of the female is divided 

 medially to its base and consists of two long, roundingly pointed 

 lobes; male valve broadly, obtusely rounding, length and 

 breadth about equal; plates narrow, spatulate, two and one- 

 half times the length of the valve. 



Larv^: Similar in form to the adult but with a broader body 

 and longer head; vertex one-half longer than wide, acutely 

 angled before, margin very thin, whole depth of head less than 

 one-fourth the length of the vertex; abdomen short, dorsally 

 carinate; color green, the entire surface covered with short 

 white hairs arising from minute black spots; a pair of larger 

 black spots near the base of the wing pads and another pair on 

 the posterior margin near the inner angle. 



Larv93 were found nearly full grown in August; the adults 

 were taken from the second week in August until October. 

 They were swept from a native grass pasture where they were 

 fairly abundant. Specimens from Nebraska and Utah bear 

 dates from May to July, indicating that the species is two- 

 brooded. Observations were not made upon the field where it 

 occurred during the first half of the season, which would 

 account for its not being found sooner. 



This species agrees in every particular with Burmeister's 

 description and figure of grisea Germar, from Brazil, and 

 undoubtedly it should be placed as a synonym of that species. 

 But Fabricius' description of viridis from "Americas insulis" 

 precedes both, and though brief, agrees well with them and 



