Sept., ipul Webster-Stoner : Calocoris rapidus. 229 



without caltropes. Length 8.5 to 13 mm. Duration of the stage 

 6 days. 



Stage VIII. — Elongate elliptical, dorsum gently arched, moderately 

 broad, sides oblique, subventer retracted. Patches of black spines 

 present above the long subdorsal horn of joint 13 and the short 

 lateral one of joint 12; caltrope patches at the bases of the lateral 

 horns on joints 6 to 11. Joint 3 stained with purple, its horns long, 

 tapered and vinous purple. Subdorsal and lateral ridges vermilion 

 lined, the rounded horns short and equal. Dorsum pale pink, the three 

 lines nearly black, the middle one straight, the side lines waved ; 

 glandular spots (i) dark with raised granular edges; a yellowish 

 border to the subdorsal ridge. Sides less pinkish, the central line 

 broken and wavy, rather purplish than black, the upper and lower 

 lines black, the upper well waved, the lower less so. Subventer 

 carneous with two blackish lines, the subventral edge reddish. The 

 long subdorsal horn of joint 13 is purplish as also the laterals of 4 

 and 6 slightly. Skin rather densely clear granular. Spines on the 

 horns white with black tips. Length 13 to 17 mm. Duration of 

 the stage 3 days (in hot weather). 



THE EGGS AND NYMPHAL STAGES OF THE DUSKY 

 LEAF BUG CALOCORIS RAPIDUS SAY. 



Bv R. L. Webster and Dayton Stoner. 



Ames, Iowa. 



In the course of some work on potato insects, being carried on ac 

 the Iowa Experiment Station, a few notes were accumulated on the 

 dusky leaf bug, Calocoris rapid}is Say, which occurred rather abun- 

 dantly on potato plants at Ames in 1913. The egg, which had not 

 been previously observed, was found, and descriptions of the five 

 nymphal stages were prepared. These notes are from the files of the 

 entomological section of the Iowa Agricultural Experiment Station 

 at Ames. 



