Occasional Papers of the Miiscitin of Zoologv 5 



above darker, dorsal markings on i obscure and ill defined, 

 2 with the base pale dull greenish or bluish and a large apical 

 brown spot, covering about three-fourths of the segment, 

 which is more or less distinctly divided longitudinally in the 

 median line; this spot joined on either side by a lateral apical 

 spot, the lower edge of which reaches the upper level of the 

 auricle ; auricle high and short, armed on its posterior edge 

 and inner side with a triple or quadruple rowed area of small 

 black spines, numbering about twenty-five ; 3 light yellowish 

 brown with a narrow interrupted brown ring at about two- 

 fifths its length and the apical third or less brown; articula- 

 tions of 4-7 black; 4-6 yellow at base, the apical third of 4, 

 two-fifths of 5 and three-fifths of 6, black, the pale basal area 

 on each wath a narrow black ring near its middle ; 7 largely 

 yellow or yellowish, a dorsal basal brown spot about one- 

 fourth the length of the segment; the spined apical border 

 black, shading anteriorly into brow'n which shades out into 

 the pale color of the segment; 8 and 9 black or dark reddish 

 brown with ill-defined lighter brown areas, especially apically ; 

 10 sometimes similar to 8 and 9 but usually lighter, in brighter 

 specimens orange-l)rown. Base of abdomen of usual form, 

 tapering from the base to about one-fourth the length of 3, 

 from that point of about imiform diameter to about one- 

 fourth the length of 7, from which point the depressed apical 

 segments ^^•iden rapidly, the width of 7 at its apex being to 

 the width of the base in the ratio of 9:4; the apex of 8 in the 

 same ratio is 13; this marks the widest point, the abdomen 

 gradually narrowing to the apex of 10 (basal to the long, pos- 

 teriorly projecting, snout-like dorsum) wdiich in the same 

 ratio is 9. The length of the segments, measured on the side, 

 at mid-height, in terms of the same ratio are as follows : seg- 

 ment I, 3; segment 2, 9; segment 3, 24; segment 4, 26; seg- 



