124 IOWA ACADEMY OF SCIENCES. 



FAMILY AKADID^E. 



Aradiis robustus Uhl. Abundaut in 1886, locally. 



Aradus similis Say.V 



Aradus acukis Say. 



Aradus amcricanus H. Schf. Common. 



Aradus rectus Say.? 



Phymata wolfii Stal. 



FAMILY PHYMATID^. 



FAMILY NABID^. 



Nabis fiisca ^tQxn. Not common. 

 CorisGus suhcoleoj)tratus Kirby. Common. 



Coi-iscus ferns Linn. A very abundant species. Occurs in grass and 

 IDreys upon a variety of injurious species. 



FAMILY REDUVIID^E. 



Sinea diadema Fab. Common. 



Acholla muUispinosa DeG. Common. 



Fitchia nigrovittata Stal. Not abundant. 



Milyas cinctus Fab. Common. 



Bijilodus luridus Stal. Not common. 



Melanolestes picipes H. Schf. Common. 



Melanolestes abdoniinalis H. Schf. Not common. 



Pygolampis pectoralis Say. Rare. 



Emesa sp. One specimen larva from Iowa City. 



FAMILY HYDROBATID.E. 



EygrotrecJius remigis Say. Common. 

 Eygrotrechus sp. One specimen. 

 Limnotrechus marginatus Say. Common. 

 Stejjfiania picta H. Schf. 

 Metrobates hesperius Uhl. One specimen. 



FAMILY VELIID.E. 



Mesovelia bisignata Uhl. Once found quite plenty. 

 Hebrics pusillus Burm. 



FAMILY SALDID.E. 



Salda coriacea Uhl. One specimen. 

 Salda interstitialis Say. Common. 

 Salda humilis Say. 



FAMILY BELOSTOMATID^. 



Zaitha Jiuminea Say. Abundaut. 



Belostoma americanum Leidy. Vei'y common. 



Benacus griseus Say. Easily confounded with americayium 



FAMILY NEPID^. 



Nepa apiculata Uhl. Not common. 

 iJareaira/jisca Pal. Beau V. Common. 



