LAMPREYS AND FISHES OF INDIANA. 257, 



two inches the diet includes a considerable proportion of insects. The 



adults drop entomostraca and live mostly on fishes and crayfishes. The 

 larger insects form a considerable part of the adult diet (Forbes). 



Lepomis machrochirus (Raf.). 

 Chain-sided Sun-fish. 



Jordan and Gilbert, 1882, S, Alb; Bollmau, 1888, 11, 567. 



Body moderately deep and compressed. Depth in the length about 

 two and one-third. The upper outline concave above the eyes and the 

 snout projecting. Mouth moderate, the maxillary extending to a per- 

 pendicular from the front of the pupil. Eye longer than snout, three 

 and three-fourths in head. Opercular flap with a red margin. Scales 

 6-40 to 43-13. Pectoral fins long, reaching back to the first soft rays 

 of the anal. The color is olive, with chain-like cross bands of darker. 

 Fins plain. Drs. Jordan and Gilbert describe the fish as being steel 

 blue, with orange so arranged as to make the cross bands, and with the 

 fins ornamented with bronze and orange. The length becomes about 

 five inches. 



Western Pennsylvania to Kentucky and Illinois. It was originally 

 taken at the falls of the Ohio and in the Wabash by Rafinesque {9, 9, 

 18 ; 17, VII, 455); Dr. Jordan reports (7, '77, 44) having taken twenty- 

 five specimens in the White River at Indianapolis. It is regarded as a 

 rare fish, and I have not seen it. 



Lepomis humilis (Girard). 



Jordan and Gilbert, 1882, 8, 479; Bollman, 1888, 11, 571. 



Body moderately deep and compressed. Depth in the length about 

 two and one-half times. Head short, in the length less than three 

 times. Mouth of moderate size, the maxillary reaching back to front of 

 the pupil. Eye in head about four. Cheeks with five rows of scales. 

 Opercular flap rather large and conspicuous, surrounded with a broad 

 red margin. Gill-rakers stifle and of moderate length. Scales 5-35-11. 

 Pectoral fins short, not as long as the head. Color olive, with some 

 greenish specks posteriorly. Orange spots occur on the sides. The 

 belly and lower fins red. Length about two and one-half inches. 



"Distributed from southern Indiana to Texas. In Indiana it has been 

 takeii in Posey County by Dr. Jordan (4, '88, 163). 



This is a brilliant little fish, but of no economical value, on account of 

 its small size. It is abundant westward and southwestward. 



17 — Geology. 



