464 MEMOIKS OF THE NATIONAL ACADEMY OF SCIENCES. 



PL MI; I. 



Al/>li/'ii>i tuiiinr, drawn from life by \V. Iv. Brooks. (Enlar.ucd oii;lit dinincters.) 

 Dorsal view ol';i N|iccinnMi of tin- ^r;iy variety <>!' (roiiiiiliu-ti/liin <-hinjnt, twice natural size. 



