IOWA ACADEMY OF SCIf:NCEi:. 



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upon climate or temperature, but in some independent of any apparent 

 condition. Witli some of the species it may be an endless task to determine 

 the conditions which most affect their geographical distribution, and in 

 such cases it is probably a combiuation of inlluences and no single one that 

 determines their range. 



Some of these notes were presented in a paper, abstract of which appears 

 in part I, page 64, the full paper never having been published. Since the 

 presentation of that paper, however, I have examined a number of col- 

 lections and much increased the list of species mentioned, as well as the 

 number of localities recorded. 



Eurygaster alternatus Say. Mass., Iowa; Wyoming; Huntington, Oregon. 

 Coeur d'Alene, Idaho; N. H. 



Corimelcena atra Am. et Serv. Colorado. 



Corimelccna albipennis Say. Colorado. Probably i-are. Seems not to 

 have been recognized since Say's description till a specimen came into my 

 hands from Prof. Gillette. 



Pangaeus bilineatus Say. Dallas, Oregon. 



Amnestus spiiiifrons Say. Colorado. 



Perillus sj)lendidus Uhl. Colorado. 



Ferillus exajHus Say. Winnipeg. 



Perillus claudus Say. Albuquerque, New Mexico; var. Huntington, 

 Oregon; var. c Say. Colorado. 



Podisus cynicus Say. 111., Teun., Tex., Colorado. 



Podisus placidns Uhl. Colorado. 



Podisus sinnosus Dallas. Williams, Ariz. 



Liotropis Immeralis Colorado. Specimens from that state are larger 

 than those collected in Iowa. 



Prionosoma podopoides Uhl. Colorado and southwest. 



Podops dubius Pal Beauv. Colorado. The specimens from Colorado 

 seem to agree better with dubius than with cinctipes which is credited to the 

 United States, while dubius is given in Uhler's check list as belonging to the 

 West Indies. 



Brochymena annulata Fab. Colorado. 



Cosmopepla carnifex Fab. New Hampshire. 



Cosmopepila consjncillaris Dallas. Colorado; Vancouver Island. 



Mormidea lugens Fab. New Hampshire. 



Euschistus fissilis Uhl. Coloi'ado; Tacoma, Wash. 



Euschistus trisligmus Say. Colorado; New Hamphire. 



Euschislus iminnctiventris Stal. Portland, Oregon. 



Euschistus variolarius Pal Beauv. Albuquerque, New Mexico; Colo. 



Lioderma ligala Say. Seligman and Williams, Arizona. 



Lioderma sayi Stal. Seligman, Arizona. 



Peribalus limbolarius Stal. Albuquerque, New Mexico; Colorado. 



Thyanta rugulosa Say. Winslow, Arizona; Needles, California. 



Thyanta custator Fab. Colorado. 



Thynnta perditor Fab. S. Dakota. 



Murgantia histrionica Hahn. Barstow, San Diego, Cal.; Albuquerque, 

 New Mexico. This species is distributed very generally over the southern 

 portion of the country extending from New Jersey on the east to southern 

 California on the west. It was at one time feared it would overrun the 



