PHOXLIS PLUMOSUS. 147 



superior antennae have the peduncle reaching as far as 

 the extremity of the head; the first joint is very long, 

 and reaches nearly to the anterior margin of the head, 

 — it is furnished upon the inferior inargin with three 

 short plumose hairs ; the second joint is very short, 

 being but little longer than broad, inferiorly slightly 

 dilated, and armed with five simple hairs; the third joint 

 is shorter than the second, and more slender ; the lla~ 

 gellum is slender, and as long as the peduncle, consisting 

 of seven or eight articuli, of which the first is as long 

 as three others; the secondary appendage is slender, 

 and nearly as long as the primary, and consists of six 

 articuli. The inferior antennas are rather shorter than 

 the superior ; the peduncle reaches as far as the ex- 

 tremity of the first joint of the peduncle of the su- 

 perior ; the penultimate joint is tlie longest, and is 

 inferiorly dilated into a squamiform process, with a 

 convex margin, and fringed with several plumose hairs, 

 as is also the antero-superior margin ; the last joint is 

 short and slender ; the flagellum is more slender still, — 

 it is shorter than the peduncle, and consists of seven or 

 eight articuli, of which the first is as long as the two 

 succeeding. The mandibles are short, (having the in- 

 cisive margin armed with denticles,) and furnished with 

 a long two-jointed appendage ; the distal joint being 

 longer than the basal, terminating obliquely and carry- 

 ing a row of closely-set hairs, which increase in length 

 towards the extremity. The foot-jaw bears a consi- 

 derable resemblance to an ordinary leg, but is distin- 

 guishable by a small squamiform process, developed 

 both from the third and fourth joints, which are sub- 

 equally short ; the fifth is long, and fringed upon the 

 inner margin with hairs ; the sixth joint is scarcely half 

 as long as the fifth, fringed like the preceding, the fringe 



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