196 Mr. H. W. Bates’s Notes on Longicorn Coleoptera. 
it be not identical. The only distinction appears to be in 
Eucopia having the posterior two pairs of pereiopoda filiform, 
whereas Chalaraspis has only the posterior pair filiform. But 
Dana says that his specimen, which was taken from the 
stomach of a penguin, had the last ‘four partly broken.” 
Willemoes-Suhm says “the last pair of pereiopods.. . 
very hairy and without branchiz. Three branches of branchize 
on the base of the gnathopoda and first four pereiopoda, two 
of which are covered by the carapace.” ‘These branchie 
he figures as dendrobranchiate. Dana remarks of his species 
Eucopia australis:—“ Branchie attached to the base of 
thoracic legs, irregularly foliaceous, in many folds.” 
Chalaraspis unguiculata, Willemoes-Suhm. 
Length 35-37 millim. 
Taken in the South Atlantic in from 350 to 2500 fathoms 
of water. ‘Common, with as wide a geographical as bathy- 
metrical distribution.” 
EXPLANATION OF THE PLATES. 
PLATE XI. 
Fig. 1. Peneus setiferus, L., male. c, portion of flagellum of first pair of 
antenne ; p, petasma and base of first pair of pleopoda; T, 
telson. 
Fig. 2. Peneus monoceros, Fabricius, female. 
Fig. 8. Peneus brevicornis, Milne-Edwards, male. p, petasma and base 
of first pair of pleopoda. 
Fig. 4. p, petasma and first pair of pleopoda of Peneus Bocaget, Johnson, 
male. 
Prats XI. 
Fig. 5. Peneus indicus, M.-Edwards, female. v p, ventral plate. 
Fig. 6. Peneus affinis, M.-Edwards, male. m,n, 0, third, fourth, and 
fifth pereiopoda ; v, outer plate of rhipidura. 
XX.—Notes on Longicorn Coleoptera—Revision of the 
ZErénicides and Amphionychides of Tropical America. 
By H. W. Bates, F.R.S., F.L.S. 
[Continued from p. 162. | 
AMPHIONYCHA. 
' Amphionycha, Leseleuc in Guérin, Mag. Zool. 1844, t. 188; Lacordaire, 
Gen. Col. ix. p. 890 (1872). 
_ After the withdrawal of its more aberrant constituents, this 
genus still remains exceedingly numerous and polymorphic. 
It comprehends all species of cylindric or linear form, with 
