COLOR PLATE H. 



Fig. 1. Notonecta undulata Say. Our most common Kansas back 

 swimmer. Magnification, 3% times. 



Fig. 2. Plea striola Fieb. The tiniest of the back swimmers and the 

 pigmy of the water bugs. Magnification, 3.9 times. 



Fig. 3. Ranatra or water scorpion. Lives in the trash of the pool and 

 feeds upon luckless insects and even small fish. (This specimen iden- 

 tified in our Snow collections as Ranatra americana.) .7 natural size. 



Fig. 4." Bnenoa margaretacea Bueno. A slender back swimmer whose 

 main food supply consists of the little Entomostraca crustacean creatures 

 which form the food supply of practically all young fish. A form harmful 

 to fish culture for this reason. Magnification, SV2 times. 



Fig. 5. Benacus griseus Say. The large "electric-light bug" or "giant 

 water bug." Destructive to fish up to three inches long at least. .7 

 natural size. 



Fig. 6. Abedus sp? Male carrying the eggs which the female has 

 glued to his back for safe keeping. .7 natural size. 



Fig. 7. Nepa apicnlata Uhl. A bug belonging to the same family as 

 Ranatra, the Nepidse. Found in mud and debris of shallow water. Mag- 

 nification, 1% times. 



Fig. 8. Pelocoris carolinensis Bueno. A "ci-eeping water bug" which 

 lives in the tangled vegetation of fresh pools. Predatory in habits. One of 

 the quickest of the water bugs to "sting" a careless collector. (Family 

 Naucoridse.) Magnification, 2.2 times. 



Fig. 9. Belostoma fliimine an'^a.y. A bug common in Kansas ponds. 

 Feeds upon small water animals, including fish. The male with his back 

 burdened with eggs is to be taken almost any time during summer. Mag- 

 nification, 1% times. 



H 



