208 IOWA ACADEMY OF SCIENCES. 



The adults are short and compact, with a rounding pointed 

 vertex and broad, almost truncate elytra. In color they are 

 rich brown with the tip and two conc9ntric bauds on the vertex 

 lighter, and two bands of lighter on the elytra, one at the base 

 and a broader one back of the middle. On these bands the nerv- 

 ures are distinctly white. In form and ornamentation closely 

 resembling D flori Pieb, but readily separated by the genitalia. 

 Length, 3.5 mm. 



The larvffi are more elongated than those of inimicus and have a nar- 

 rower and more definitely angled vertex. They are colored very much as 

 in the adult, but the markings are different. There is a narrow median 

 line of white extending from the tip of the vertex to the last abdominal 

 segment, where it broadens and nearly covers the tip; the inner margin of 

 the eyes, a concentric band near the point of the vertex, and two spots just 

 back of the center on either side are lighter. A broad marginal stripe 

 from the eye back, an indistinct, narrow one from the inner margin of the 

 eye, which may break up into white spots, one on the posterior margin of 

 each abdominal segment, and a second row of dots midway between the 

 first and the marginal stripe on either side, complete the white markings 

 of the body. The face is light witti fuscous striations. 



The larvae were first taken sparingly from upland prairie 

 the second week in June. They were full-grown and were 

 probably belated ones, as the adults had been taken during the 

 first week. On June 16th the first observation on wooded pas- 

 tures was made and the adults were swept in immense numbers 

 from rank blue grass. They continued to be found in great 

 numbers whenever observed throughout the remainder of the 

 season. The larvae were next observed July lltb, when they 

 were somewhat over half -grown , and by the last week in July 

 they were full-grown; abundant, and fresh looking adults were 

 also numerous. Again on the 5th of September nearly full- 

 grown larvae were observed to be numerous, as also were the 

 adults. Later in the month the larvae were becoming rare and 

 the adults still very plenty, as they continued to be through- 

 out October. Six females dissected on the 27th of October 

 showed no signs of eggs, from which it might be inferred 

 that they had been deposited. On this assumption, which coin- 

 cides well with the early appearance of the spring brood of 

 larvie, the following arrangement of broods would seem very 

 probable and harmonize well with the dates given above. 



First brood of larvae through May and the first week in June, 

 adults from the last week in May until the middle of July; sec- 

 ond brood of larvae, last week in June until the first week in 

 August; second brood of adults from middle of July through 



