HEMIPTERA PHYTOCOEIDAB MIEIS INSTABIL1S. 837 



rostrum reaching to behind the intermediate COXOB. Pronotum convex 

 behind, the surface finely, deeply, and partly confluently punctured ; the 

 lateral margins broadly sinuated and with the carinate edge sharply promi- 

 nent ; the lateral black vittai of the head are continued to each side of 

 the scutellum, and sometimes extend broadened along the hemelytra to 

 the apex of the corium ; anterior angles callous exteriorly ; the lateral carina 

 abbreviated before reaching to them ; humeral angles slightly recurved 

 behind ; the median line distinct and paler ; propleura coarsely, confluently 

 punctured, crossed longitudinally by a slender brawn or red line, which is 

 continued interruptedly to near the apex of the venter ; meso- and meta- 

 pleura punctured on the disk. Hemelytra pale straw-yellow on the exterior 

 margin, and also on the edge of the inner margin, minutely, closely punc- 

 tured, pubescent ; cuneus generally pale green ; membrane hyaline, or 

 tinged with brown, with the nervures rufous or pale brown, sometimes with 

 a fuscous short streak extending beyond the nervure. Wings hyaline or 

 faintly smoky and iridescent, with the nervures brown. Scutellum with 

 finer punctures than the pronotum, those of the middle and base being 

 sometimes fuscous ; the median line pale and smooth. Tergum green or 

 pale rufous ; the disk more or less fuscous. Venter green or pale rufo-testa- 

 ceous, invested with rather close, yellow, sericeous pubescence, usually with 

 a slender vitta of interrupted red or fuscous lines against the impression 

 bounding the connexivum. Legs green, pubescent, often having the tarsi 

 and tibise rufous ; the posterior femora usually with two rows of rufous or 

 piceous dots on the upper surface, and two similar rows beneath ; the nails 

 and tip of joint next to them piceous. 



Length, 6-7 millimeters ; width across the humeri, lf-2 millimeters. 



Collected at Roaring Fork, Colorado, by Dr. J. T. Rothrock. 



I had formerly accepted the determination of Dr. Harris in referring 

 this species to Miris dorsalis, Say ; but after having closely compared speci- 

 mens from many parts of North America with his description, the discrep- 

 ancies are too great to permit such a reference. 



This species inhabits a large part of North America, and it may yet 

 prove to be only the western form of the European M. laevigatus, Linn. 



