IOWA ACADEMY OF SCIENCES. 213 



plates broad at base, rapidly, rounding-ly narrowing to the narrowly pro 

 duced, blaok-tipped points. Described from numerous specimens. 



Larvae: Tawny yellow, sometimes with light fuscous marking; a bright 

 purple spot on eitaer eye in life or in freshly mounted specimens; vertex 

 narrow and longer, more acutely pointed than in melscbeimeri; body nar- 

 rower, more gradually tapering. In general color is more intense than in 

 melscbeimeri, and approaches inimicus; late or exposed forms sometimes 

 distinctly fuscous marked. Living specimens are readily separated by the 

 distinct purple spot on the eye. 



This species has been received from Colorado, and has b?en 

 collected at Ames prior to this season. It was first taken this 

 year as adults the last week in May, and from then on through 

 July. Larva3 were taken abundantly during the second and 

 third weeks in July, disappearing by the end; adults were again 

 found from the middle of July through August; larvas again 

 appearirg in August, maturing through September; adults 

 from the first of September on through the season. 



It has been found everywhere on Andropogon scoparius, to 

 which it seems strictly confined. Mowing during the middle of 

 June and again the first half of August, or burning during the 

 fall or spring would serve to check this species. 



DELTOCEPHALUS SYLVESTRIS N. SP. 

 (PI. XXV, Fig. 4.) 



Form and venation nearly of D. cinereus, but with a longer 

 vertex. Form and size of the European repletus, but differing 

 in venation. Length, 3.50 mm. Width, 1 mm. 



Vertex twice as long on the middle as next eye, longer than the prono- 

 tum, nearly twice longer than wide, acutely pointed; front long, narrow, 

 much longer than wide, hardly half wider at ocelli than on clypeus; clypeus 

 strong; lora3 broad, prominent. Pronotum long, more than half as long as 

 wide; posterior angles strong; elytra long, narrow, nervures distinct, vena- 

 tion as in debilis, outer anteapical long, narrow, distinctly more than half 

 the length of the middle one. 



Color: Greenish, marked with pale fuscous and brown; vert-x light 

 green with two more or less distinct brownish stripes; pronotum green, light 

 margined; elytra greenish, nervures light, more or less fuscous margined; 

 never with a whitish cloud, as in cinereus; tergum black at base; front 

 fuscous with light arc3, clypeus light; lorte and gense with fuscous and light 

 margins. 



Genitalia: Ultimate ventral segment of the female light colored, long, 

 slightly narrowing posteriorly; the middle third abruptly produced one-half 

 its width, produced part longer at the margin, not notched or rounded as 

 in cinereus, distinctly black; male valve broadly triangular, apex pointed; 

 plates three times the length of the valve, broad at base, concavely pointed, 

 tip divergent, a dark line near the outer margin widened to a spot near 

 the middle. 



