IOWA ACADEMY OP SCIENCES. 193 



The larvae appear the latter part of May, maturing before 

 the end of June, adults appearing before the middle of June 

 and continuing till the middle of July, larvas again appearing 

 in July, maturing in August, adults from the middle of August 

 on into October. The larvas were taken in grass lands but were 

 more abundant in shady situations. 



PLATYMETOPIUS FRONTALIS VAN D. 

 Canadian Entomologist, XXII, p. 112, 1890. 



This species may be readily recognized by its much darker 

 appearance, being dark brown to black with a broad lemon- 

 yellow face and the small round white spots in the ends of the 

 elytral areoles distinct. It is slightly shorter and stouter than 

 acutus and has a shorter vertex. 



The larvae bear a strong superficial resemblance to those of 

 Deltocephalus inimicus, but may be readily separated by the pres- 

 ence of the marginal stripe in front of the eyes. 



Form and pattern of ornamentation similar to that of P. acutus 

 but much shorter and stouter. Vertex very much shorter. 



Color: A dorsal light yellow to cream-colored stripe narrowing to a 

 point on the tip of the vertex, broadening with irregular margins on the 

 disk of the abdomen, interrupted before the tip by a narrow black band on 

 base of last segment. Marginal dark stripe extending equally above and 

 below the border of the vertex meeting -in a point at the apex, a small 

 lobate expansion of the dorsal stripe midway between edge and tip of ver- 

 tex just behind the white fronial suture. Below, white, tip of posterior 

 femur and second tarsal joint annulated with black. 



Life-history similar to that of acutus; larvas from the last of 

 May nearly through June; adults from the middle of June 

 nearly through July; larvae from the middle of July nearly 

 through August; adults from the middle of August through 

 September. 



Fouad exclusively in shaded situations; larvae were swept 

 from undergrowths of grass and weeds. 



This species has a quite extended distribution, being credited 

 by VanDuzae to Canada, New York, Illinois, Iowa and Kansas, 

 and as it does not occur in such abundance as some of the other 

 species, and would, therefore, be less likely to appear in col- 

 lections, it may b3 assumed to occur throughout the northern 

 United States east of the plains at least. 



PLATYMETOPIUS CINEREUS, N. SP. 

 (PI. .xxvi. Fig. 1.) 



Form of P. acutus but smaller and lighter colored, equaling 

 fuscifrons in siz-j. Length, female nearly 4 mm., male, 3.50 mm. 



