THK GOLDEN TROtTT. 47 



that Coleoptcia and 1 lyiiienoiitcra were, the two chief constituents of the stonmeh 

 contents of these specimens. The 15 per cent of the latter was made up of 1:^.8 per 

 cent ants and )i.'i per cent othei' Hymenoptera. Parasitic thread-worms (Ncmatoda) 

 were found in 68 per cent of tliese" trout. Some stomachs contained as many as 10 

 of tliese parasites. 



Coyote Crrek. — Only one trout from Coyote ( "reek was studied. The spicimcn 

 was a male, 6 inches long, and its stomach was estimated to be one-third f idl. The 

 stomach contents consisted of the following: Plecoptora (stone-fly nymphs) 15 per 

 cent, Neuroptera (a dobson) 25 per cent, chironomid larva? 2 per cent, and insect 

 fragments 58 per cent. 



Salmo gilberti .lordau. 



Upper Kern Lake. —Six trout were obtained from Upper Kern Lake on July 

 11» and 21, varying in length from 7 to 19.75 inches. The stomach of the longest 

 specimen was emptv and onlv two of the others were estimated to be as much as 

 half full. 



Ej>hei)ierid(i. — May-fly nymphs constituted 5 per cent of the contents of one 

 stomach. 



ChiriiiKiiiiiihf. -One stomach contained 25 per cent chironomid lar\;e. 



TIi/iiii ii<i/if<rii. — Tiie conttMits of one stomach consisted of ?, per cent ants and 2 

 per cent other Hymenoptei'a. 



Inxi'cf /'ri/(/>/u')ifx.~Most of the insect fragments were too small for identirication. 

 These small fragments constituted 94 per cent of the contents of one stomach, 93 per 

 cent of another, 50 per cent of another, and 10 per cent of each of two others. 



Vegrfahh' iiKitfci: — Ninety per cent of the contents of one stomach consisted of 

 pieces of a Jiutrnrhlinii which was growing ai)undantly in the lake; another contained 

 90 per cent Jlafnirhiinii and algtv; another 25 percent vegetable matter, and a fourth 

 2 per cent Batr<irhnnit. 



Sand. — Sand constituted 1 per cent of tiie contents of one stomacii. 



The average percentages for these Upper Kern Lake specimens are as follows: 

 Ephemerida (May-fly n3'uiphs) 1, chironomid larva? 5, Hymenoptera 1, insect frag- 

 ments 51.4, vegetable matter -11.4, sand 0.2. The chief characteristic of these aver- 

 ages is the high percentage of vegetable matter. 



Kern River. — One specimen, a female 11 inches long, was caught about a mile 

 above Upper Kern Lake on July 21. Its stomach contained Plecoptera (stone-fly 

 nymphs) 15 per cent, Neuroptera (a dobson) 30 per cent, Coleoptera (beetle remains) 

 2 per cent, and insect fragments 36 per cent. 



Salmo roosevelti Everniann. 



Volcano Creek. — Eighteen golden trout were ol)taiued from Volcano Creek on 

 July 22 and 23, 1904, all caught in the lower course of the creek only two or three 

 luiles above its mouth. The longest and shortest ti'out measured, respectively, 1 1 and 

 5 inches. The stomachs of 7 of them were estimated to be half full or more, while 

 the others were only a quarter to a third full. 



Ara.chn'ida. — Spiders constituted 5 per cent of the contents of 1 stomach. 



Ei>hemirlda. — Two to 10 per cent of the contents of 7 stomachs consisted of 

 adult Maj^ flies and 12 stomachs contained from 1 to 30 jier cent May-fly nymphs. 



