46 BULLETIN OF THE BUREAU OF FISHERIES. 



an averag-e of 30.82 i)cr cent, foiiiiod the most important clement of the food of 

 these specimens, and adult stone-flies and nymphs were second in importance. 



Little Kern River. — The il trout {Saimo inhitei) obtained from this stream 

 were cauf^ht in the vicinity of a place called Broder's cabin on July 17, 1904. They 

 varied in leiio'th from .5 to JS inches. The stomachs of 84 were estimated to he half 

 full or more: the others were less than half full. 



D'oiit iijij. — A trout egg constituted 5 per cent of tiic contents of one stomach. 



flijilniclniidii. — Five stomachs contained hydrachiiids; one contained 1 percent 

 and the other four each 0.25 per cent. 



EpIieiiKi'ida. — May-fly nymphs constituted from 1 to 5 per cent of the contents 

 of eight stomachs. 



I^U'coptei'K. — Adult stone-flies constituted 1.5 ])er cent of the conti'iits of two 

 stomachs, stone-fly nymphs Ut and 5 per cent of two others, and pup;e 1 per cent of 

 another. 



Orthoptem. — Two stomachs contained 50 and 3 percent remains of grasshoppers 

 (locusts), and fragments which appeared to be parts of a mantis composed 2 per cent 

 of the contents of another. 



Tlemiptera. — Thirteen stomachs contained from 1 per cent to 10 per cent 

 ITeonljdera. 



Trichdjiti'm. — Six specimens had eaten 0.5 per cent to 30 per cent caddis-fly larvre 

 and six others containetl 1 to 8 per cent cases of caddis-fly larvte. 



Lcpidiipt( nt. — Moths constituted 15 per cent of the contents of two stomachs, 3 

 and 2 per cent of two others, while 15 per cent of the contents of another consisted 

 of a caterpillar. 



Diptera. — One stomach contained 15 per cent Diptera, one 5 per cent, three 2 

 per cent, five 1 per cent, and two 0.5 per cent. 



Chh'onoiiiidx. — Chironomid larvte and pupaj were foimd in 24 stomachs and 

 constituted from 0.25 to 10 per cent of the contents. 



Coleoptera. — Beetles were found in 38 stomachs. Thej' made up from 10 to 50 

 per cent of the contents of 26 stomachs and 1 to 9 per cent of the contents of the 

 other 12. 



Hymenoptem. — Forty of these 41 trout had eaten insects belonging to this order. 

 Thirty-nine had eaten from 2 to 35 per cent ants; six had eaten 2 to 10 per cent bees; 

 and nine, 1 to 8 per cent other Ilymenoptera. 



[nxect fragments. — Small fragments of insects constituted from 10 to 92 percent 

 of the contents of 40 stomachs. 



Vegetable matter. — Sixteen stomachs were found to contain from I to 10 per 

 cent vegetable matter. 



Sand. — The contents of 8 stomachs consisted of 1 to 8 per cent sand. It ajipeared 

 that a large part of this sand had been deri\ed from the larval and pupal cases of 

 insects. 



The following are the average percentages for these 41 specimens: Ephemerida 

 (May-fly nymphs) 0.7, Plecoptera (adult stone-flies and nymphs) 1.28, Orthoptera 1.4, 

 Hemiptera 0. 95, trichopter larvte 1.4, cases of trichopter larvte 0. 7, Lepidoptera (moths) 

 1.3, Diptera 0.88, chironomid larviv, and pupa' 1.41, Coleoptera 15, H^Mncnoptera 15, 

 insect fragments 57.11, vegetable matter 1.4, sand 1.3. The above percentages show 



