On the Longicorn Colecyptera of Tropical America. 117 



above base of coxae of hind legs bearing two widely divergent 

 obtuse spines ; posterior area trisegmented, tul>erculate, second 

 segmentation bearing a prominent central acute spine, third 

 segmentation terminating in a long, feebly curved, and very 

 robust spine, three lines in length ; legs long, rugose, denticu- 

 late ; hind legs, with the exception of the femora, internally 

 dentated; body below, including abdomen, coarsely tuberculate; 

 palpi moderately long, subcyiindrical, with slender spines ; 

 cheliceres small ; the chelai cylindrical, pilose, pincers crossing 

 at the tips and strongly denticulate internally. 



Length of cephalothorax (excluding terminal spine) 4| lines ; 

 relative length of legs 1, 3, 2, 4. 



Hah. Ega {Bates). One specimen. B.M. 



Most nearly allied to G. armillatus, but in general appear- 

 ance utterly unlike any thing previously described : it reminds 

 me of a similarly ornamented fossil form described by Mr. 

 Henry Woodward (Geol. Mag. vol. viii. p. 3S5, pi. xi. 1871) 

 as Eojyhrymis Prestvicii ( Curculioides of Samouelle) ; the latter, 

 however, excepting in ornamentation, appears to come nearer 

 to Ischyropsalis of Koch. 



XV. — Notes on the Longicorn Coleoptera of Tropical America. 

 By H. W. Bates, F.L.S. 



[Continued from p. 45.] 



Genus ACYPHODERES. 

 Serville, Ann. Sec, Ent. Fr. 1833, p. 549; Lacord. Genera, vol. viii. p. 505. 

 The character given by Serville as distinguishing this genus 

 was the broadly ovate depressed uneven thorax. A more 

 constant feature is the rather abruptly subulate elytra. The 

 thorax is sometimes oblong-ovate and convex. The antenna 

 in all the species are robust and strongly serrated. 



I. Apex of elytra entire. 

 A. Thorax without dorsal ridges. 



1. Acyphoderes crinitus, Klug. 



Stenopterus criuiiuSf King, Entom. Bras. Specini. alter, p. 56, t. xliv. 

 f. 11. 



Rio Janeiro. 



2. Acyphoderes moestus, n. sp. 



A. niger, velutinus, dense breviter hh-sutus ; thorace elongato, sub- 



