1912] Taylor: A New Pcrognathus 157 



The two specimens, possibly belonging to longimembris, from 

 Sites, Colusa County, were not included in the table of measure- 

 ments, as they are aberrant in respect to size. Their teeth show 

 them to be .younger than the other adults measured, and yet 

 their measurements are comparatively great, decidedly above 

 the average for the rest of the series. These examples suggest 

 that another form of longimembris exists in the Sacramento 

 Valley. 



Our series of young animals of the two forms are for the 

 most part not comparable. The few juvenals of P. I. longimem- 

 bris in the Museum are with some exceptions younger than any 

 of our extensive series (comprising thirty specimens) of P. I. 

 neglectus. One of the latter contained seven embryos. Two 

 specimens (nos. 14540 from McKittriek, and 14519 from Bakers- 

 field) seem to be comparable as to age. The example of longi- 

 membris is slightly darker in general coloration than the speci- 

 men of neglectus. Two very young specimens (nos. 14514 from 

 Bakersfield, and 14548 from McKittriek) exemplify an excep- 

 tional color relation, the specimen of neglectus being darker 

 than the one of longimembris. Pour other specimens of longi- 

 membris (nos. 1450G, 14520, 14521, 14523) are properly not 

 comparable with the series of neglectus. They are somewhat 

 darker than the McKittriek series. The coloration toward the 

 tip of the tail in juvenals of longimi mbris is definitely darker 

 than in neglectus. 



On the whole the series of juvenals, or adolescents, of the 

 new subspecies is uniformly pale in coloration. They are near 

 drab-gray dorsally, lightening to drab or ecru drab laterally; 

 a definite lateral line of buff; sides of face and top of nose buff, 

 modified slightly with black in the latter region ; the buffy colora- 

 tion of the lateral line extends nearly to the heel on the outside 

 of the hind leg, sometimes extending a short distance onto the 

 fore-limb externally; feet white; a small white spot under the 

 ear, and a light spot just back of the ear, varying from white 

 to buff; tail buff, thinly haired, sometimes gray dorsally, but 

 in most cases not clearly bi-color, becoming gray toward tip ; 



