122 IOWA ACADEMY OF SCIENCES. 



northern states, and Prof. Riley some twenty years ago and other writers 

 more recently have predicted such a danger but it would surely have as 

 good an opportunity in the Mississippi valley as anywhere and the fact that 

 it has made no advance to speak of in the last twenty-five or thirty years 

 seems good evidence that it has a pretty definite southern limit. It will 

 doubtless remain a serious pest to cruciferous plants through all the south- 

 ern region and may be expected to become a pest in all settled localities in 

 the southwest portion of the country. 



Chariesterus antemiator Fab. Colorado. 



Leptoglossus cinctusYi.iiha.i. (?) Colorado. 



Anasa trislis DeGreer. Albuquerque, New Mexico. This familiar east- 

 ern pest is generally distributed over the southwestern country and will 

 doubtless prove a pest in those regions. I have seen it in destructive num- 

 bers in central Kansas. 



Alydus conspersus Montandon. New Hampshire; Iowa. This form has 

 been confused with the European calcaratus from which Montandon has 

 separated it under the above name and has stated its occurrence in Michigan; 

 Burlington, Iowa; Massachusetts, Colorado and Dakota. It is generally 

 smaller and lighter colored than eurinus Say, but specimens can be picked 

 out of any large series which approach that species in size and markings 

 and the two seem to me to be quite closely related, though I believe Mont- 

 andon is correct in distinguishing them. 



Alydus jyluto Uhl. (?) This is a large black form, but if my specimens 

 are good examples it might be considered an extreme foi'm of eurinus 

 lai'ger and blacker than the average forms. 



Scolopocertcs seeundarius Uhl. Colorado. 



Jalysus spinosus Say. Albuquerque, New Mexico; San Diego, California; 

 San Bernardino, California. 



Nysius thyvu. New Hampshire. 



Nysius Angustatus Uhl. Colorado. This species is widely distributed 

 and somewhat variable. It approaches thymi in northeastern part of the 

 country and calijornicus of the southwest, and it seems to me to present a 

 very close relationship to the senicionis of Europe. 



Nysius californicus Stal. Seligman, Ariz.; Albuquerque, New Mexico. 



Orsillacis producta. New Hampshire. 



Ischnorhynclms didymus Zait. Colorado; Washington; New Hampshire. 



Cymus angustatus Stal. New Hampshire. 



Cymus claviculus. New Hampshire. 



Oedancala dorsalis Say. New Hampshire. 



Ligyrocoris sylvestris Linn. Colorado; New Hampshire. 



Emblethis arenarius Linn. Barstow, Cal.; Peach Springs, Williams, Ariz.; 

 Colorado. 



EremoGorisferus Say. Colorado. 



Feliopelta abbreviata Uhl. Lawrence, Kans.; New Hampshire. 



MelanoGoryphus bicrucis Say. Colorado. It occurs very rarely at Ames, 

 Iowa. 



Melanocoryiihusjacetus Say. Winslow, Ariz.; Colorado. 



LygcBtis bisiriangularis Say. Seligman, Winslow, Ariz.; Los Angeles, Cal. 



Lygceus reclivatus Say. Barstow, San Bernardino, Cal. 



Oncopeltus fasciatus Dallas. San Bernardino, Cal. 



