lOO DAVENPORT ACADEMY OF NATURAL SCIENCES. 



The species is single-brooded, the larvae appearing by the middle of 

 May, as small, almost round, gray specks clustered on the ground 

 around or in among the stems of the grass clump, springing a foot or 

 more away if disturbed. Towards the last of June they become full- 

 grown and may Ije found on the ground under the edge of the grass 

 clump, so closely resembling the dirt and rubbish as to be hardly dis- 

 cernable. The adults appear the last week in June and the first week 

 in July, and remain in decreasing numbers through August. 



Phlepsius nebulosus V. D. (Plate VI., Fig. 4). 



Very similar in form and color to irroratus, but much larger, being 

 about three-eights of an inch long and about one-fourth that broad; 

 the head is broader and less pointed and much thinner on the edge. 



The larvae are very broad and flat, with longer and flatter heads 

 than the adult, the abdomen tapering to a sharp point, clear creamy- 

 yellow with innumerable fine brown jjoints arranged in wavy lines, a 

 light stripe down the middle and three rows of spots on each side of 

 the abdomen, the outer row with black margins, the eyes are dark 

 red and there is a dark spot on either side of the tip of the head. 



Nearly full-grown larvae were found the third week in June in 

 clumps of switch grass {Panicum virgatum) feeding upright on the 

 broad stems which they resemble in color. Placed in the cage they 

 issued as adults about the first of July. Adults were taken from the last 

 of June through July, seeming to stay closely by low ground where 

 the grass occurs. 



ERRATA. 



Page 60, line 2, for " 2. 25 " read "1.25." 



Pages 70 and 73, for "Plate II." read "Plate III." 



In part of edition, on page 65, ^'elaeta'' should read '■'■ laeta.'" 



The plates accompanying this paper have been drawn from nature 

 by Miss Charlotte M. King under the personal supervision of the 

 authors. They are used in this connection by courtesy of the Iowa 

 Experiment Station. 



