206 IOWA ACADEMY OF SCIENCES. 



did not occur. They were then nearly grown, and the adults 

 were beginning to appear. Two weeks later the adults were 

 abundant and the larvae gone. The adults continued abundant 

 until into September, and could be found to the end of the 

 season. 



This species was taken wherever B. hirsuta was found, and 

 never anywhere else during the season. B. curtipendula how- 

 ever usually occurs with hirsuta so that it could not be excluded 

 on that ground, but the latter also occurs where Mrsuta does 

 not, and in no such locations has this species been taken as yet. 

 Within the limit? of the area it appears to feed indifferently on 

 either plant, so that if restricted to the one it is probably a 

 restriction of egg deposition. 



DELTOCEPHALUS ABBREVIATUS N. SP. 

 (Plate xxii. Fig. 4.) 



Form of pectinatus but much smaller. Smaller than juelschei- 

 meri. Light cinereas in color; length, 3 to 3.25 mm.; width, on 

 center of costa, 1.25 mm. 



Vertex shorter than in reBexus; slightly, roundingly pointed, twice as 

 long on the middle as next eye, about half longer than breadth between 

 the eyes; front slightly proportionately longer than in re/7exus, sidesti-aight; 

 clypeus longer than broad at base; pronotum very short, truncate behind; 

 elytra variable in length, without an appendix; veins on clavus not united; 

 outer apical cell smaller than anal. 



Color, light clnereus, above; markings as iu reSexus strong; triangle 

 around the white tip complete, broad; oblique line on margin usually 

 reduced to a dot midway between the ocelli and tip; transverse band nearly 

 complete; slightly crescentiform; oblique spots at base of vertex usually 

 strong, sometimes a row of spots near the front margin of the pronotum. 

 Elytra light cinereus, nearly all the nervures fuscous margined; apical 

 cells and anterior margin of reflexed veinlet broadly blacK margined; ter- 

 gum dark at base, two apical segments creamy white, with a V-shaped 

 black margin in the female. Below, front fuscous; clypeus, lorte and genaj 

 usually light with fusous sutures; venter fuscous. 



Genitalia: Ultimate ventral segment of the female twice wider than 

 long, slightly emarginate posteriorly; middle fourth produced half its width, 

 truncate, notched; arcuated and dark colored each side of the notch. Male, 

 last ventral segment very short; valve large, acutely angled, much longer 

 than the segment; plates broad, convexly pointed; about twice the length 

 of the valve; pygofers elongate, narrow, much exceeding the plate. 

 Described from numerous examples. 



Larvie: Resembling those of reflexus but much smaller in size. Color, 

 olive green to fuscous; dark markings broken up into quadrate areas with 

 fuscous margins. Vertex acutely pointed; body short, broad, abruptly 

 terminated; median line narrow, broadening on the abdomen, where it is 

 obscure; lateral lines usually complete; a transverse line on the vertex, 



