THK (iOLDEN TROUT. 49 



had IVd most al>midaiitly on trichopter larva', eliiroiiomid larva' and pupa', and 

 Coloopteru; triclioptcr larva' ranked highei-it with the trout from Soda Creek, with 

 adult stoue-tlies and nymphs second in importance; those from the Little Kern River 

 had partaken most freely of Coleoptera (beetles) and Hymenoptera (ants); and tlie 

 golden trout had fed most freely on May-fly nymphs, adult stone-flies and nymphs, 

 and adult and larval Trichoptera. These investigations were not suflicient to deter- 

 mine whether those difl'erenccs in diet were due to a choice of food by the trout or 

 whether they were the result of differences in the distribution of the different kinds 

 of insects resulting from local conditions. The latter was probably a very important 

 factor in producing these difl'erences, as it was noted that the aquatic; larvie varied, 

 not only in actual numbers but also in I'elative abundance, in the ditt'ercnt localities. 



Vegetable matter formed a comparatively small part of the stomach contents of 

 the specimens obtained from streams, and probably much of this was taken by 

 accident. Three of the trout from Upper Kern Lake, however, contained considcr- 

 al)le quantities of vegetal)le matter, so that part of it. at least, nmst have liecn taken 

 piu-posely. 



Li the cases whei-e the sex was noted there was no apparent difference in the 

 diet of the male and female. 



CLADOCERA AND COPEPODA OE THE KERN IIIVKI! RE(;i(1N. 



Cladocera. — The C'ladoeera collected in upi>er Kern Laki' on .July 20 represented 

 only two forms, Enn/r, r.n.s l,nH,n,if„.-< (.). V. Midler and r/,,/,A</v,.v".vyV/,^/vV».v O. F. 

 Miiller, which, howcNcr, wnr aluiiidant. 



The material collected from Hockett Lak(>s on .Inly If, contained tli.' following 

 Cladocera, which, with the exception of Dupltn'm and I'nh/ji/i, ums. were abundant: 



D'mphaiiowma luiiehtenheniianiniL Fischer. This form apjiarentiy lieloiigs to 

 Lilljel)oig"s \ariety m, i/ulopx. The head is narrow and its ventral margin is concave 

 in some speeiiiien>. just as shown in figure 7, plate iv, Cladocera Suecia\ The eye is 

 large, about live sixths of the width of the anterior part of the head. 



Daphnia longispina O. F. Midler. 



Scapholeherw inti,oron<(ta O. F. Miiller. 



S!jnnr,j,h„J,i.s.rruJ<ttu.'<0. F. Miiller. 



(_'.rn>,!„j,/nu,i jn,l,-/,.II<t Sars. 



,Str.l,l,,r.r>i. .,,;■;, .nnlatiis Fischer. 



Jiiuu/rercxx hunellatm O. F. Miiller. 



LijiK-i'iix (ijfiiiis Leydig. 



(''h,/,l,,r>ixs/,l,.;r;r„. O. F. Midler. . 



Piih/j>h< III lis ji, ilii-iil IIS Linna'us. 



Cojx'poda. - Dr. C. Dwight Marsh has identilied the following eopepods collected 

 in Kern Lake and Hockett Lakes: 



From Kern Lake, Cyclops xcrriihtfus Fischer and Ci/i-lnps nlhldnK ,1 urine. 



From Hockett Lakes, Oijcla/i-s xm-iilittiis luoidan i/.s Brady, Ci/c/oj/x idltldus J urine, 

 and Dlaptoinus sUjnicauda Lilljeborg. 



B. ii. F. moo— i 



