14 Mr. H. W. Bates on the Longicorn Coleoptera 
thighs clavate; tarsi undilated and simple in both sexes; basal 
joint of posterior tarsi as long as, or longer than, the three suc- 
ceeding taken together. 
This genus is distinguished from all the preceding by the 
cleft or deeply notched apex of the terminal ventral segment in 
the females; in this it agrees with Graphisurus of Kirby*, 
which, again, is connected by intermediate species with Acantho- 
cinus, a group containing the well-known A. edilis, or carpenter- 
beetle, an inhabitant of the wooded parts of our own island. 
Thus all the numerous genera of Acanthocinite are closely linked 
together ; for species of Nyssodrys (e.g. N. signifera) exhibit to 
a slight extent the character of a cleft apex of the terminal ven- 
tral segment, and this genus leads on without any sharp line of 
demarcation to Leiopus,—showing that the European genera 
Leiopus and Acanthocinus, which appear to us so far asunder, 
are connected together by insensible gradations of form. The 
typical species of Toroneus (namely those which have no thoracic 
spines) are easily distinguishable from Graphisurus ; but if the 
bounds of the genus be extended a little, so as to embrace a few 
closely allied species which have small thoracic spinest, the only 
difference between the two genera will be one of general form, 
the Graphisuri being much flattened, with comparatively short 
antennal joints, whilst the Toronai have convex shapes and very 
slender antenne. 
1. Toroneus figuratus, n. sp. 
T. oblongus, convexiusculus, nigro-castaneus, capite thoraceque vitta 
centrali ochracea: elytris litura humerali, macula magna com- 
muni ante medium antice et postice per suturam excurrente, 
fasciaque lata inflecta prope apicem cinereo-cchraceis. Long. 
4=5 line “6°: 
Head dark brown, sides of forehead and cheeks each with a 
yellowish streak, vertex with a broad central yellowish stripe. 
Antenne slender, twice the length of the body in both sexes, 
reddish, tips of joimts dusky, and bases of third to sixth joints 
whitish. Thorax not much broader than the head, and with a 
slight protuberance on each side about the middle, but no trace 
* This genus comprehends the followmg North-American species :— 
1. G. fasciatus, De Geer, Mém. v. p. 114, t. 14. f. 7. 
, Kirby, Fauna Boreali- Americana, Ins. p. 169. 
2= Lamia mixta, Fabr. E. S. Suppl. 144. 26. 
2. G. obsoletus, Oliv. Col. iv. p. 130, t. 13. f. 90. 
= Astynomus levicollis, Dj. Cat. 
3. G. pusillus, Kirby, Fauna Bor.-Americana, p. 169. 
Acanthocinus atomarius (¥.), of Europe, is also probably a Graphisurus. 
+ Such as Eutrypanus tessellatus, White, Cat. p. 372 (= E. variegatus, 
Dej. Cat.), and others, not found in the Amazons region. 
