394 PROCEEDINGS OF THE ACADEMY OF [April, 



rhomboids with rounded corners. In all cases the scar of attachment is 

 slightly laterad of the center, and the lateral margin is peculiarly thick- 

 ened and upturned. The lateral margin of the first bears a close fringe 

 of short, thick, crowded papillse arranged in two or three rows ; succeeding 

 ones bear no papillse or only a few near the antero-lateral angle, while 

 those still farther back have an increased number partly of cylindroid 

 partly of clavate papillse each with an apical sense organ (fig. 109). 

 All elytra are of soft and delicate texture, especially the more posterior- 

 which are colorless or exhibit faint traces of pigment. The first four 

 at least are rather heavily pigmented with a mosaic of polygonal 

 chromatophores of slaty fuscous and orange brown forming a blotched 

 reticular pattern enclosing colorless areas, the brown abounding on 

 the periphery, the fuscous toward the center. On the first pair nearly 

 the entire surface is blotched, on the others only a broad oblique band 

 covering the postero-medial exposed parts, the lateral and covered 

 portions being quite colorless (fig. 108). 



Acicula, which occur singly in each ramus, are stout, tapered, 

 straight and yellow. Setse colorless and translucent. Notopodials — 

 loose tufts curving dorsad — of long, very slender, soft, flexible capil- 

 laries, plumose with fine hairs alternating on the two sides and, toward 

 the base, where they become long and conspicuous, possibly arranged 

 spirally ; they diminish in size and finally become obsolete distally , leav- 

 ing a long smooth fiber-like tip (PI. XXXIII, fig. 112). NeuropodiaL 

 setse arranged in a modification of the horse- shoe- shaped fascicle of 

 Sthenelais tertiaglabra, the anterior gap becoming very large, the whole- 

 fascicle much flattened antero-posteriorly and the ventral supple- 

 mentary series crowded against its ventral face ; the result is practi- 

 cally a single vertical rank of setse with slight dorsal and ventral spurs. 

 These setse differ greatly from those typical of Sthenelais, all of the 

 appendages being short, simple-pointed and non-articidate. The 

 two or three in the dorsal spur have the slightly enlarged end of the 

 shaft roughened by two or three rows of small stiff hairs on each side 

 (a character that becomes less evident and probably disappears 

 posteriorly), and the appendages two or three times as long as the 

 diameter of the shaft, cigar-shaped with blunt tips and more pointed 

 bases (fig. 110). The remainder of the setse of the main series are 

 stouter, have the ends of the shafts quite smooth, the appendages 

 pointed, straight and conical and from one and one-half to twice the 

 diameter of the shafts (fig. Ilia). Setse of the ventral spur again 

 more slender with short somewhat claw-like appendages and smooth 

 shafts (fig. lllfo). There is a general tendency for the appendages 



