ANCHONUS. 69 
relatively longer scape to the antenne and the anterior coxe not quite touching. The 
males are separable from the females by the shorter and less cylindrical apical portion 
of the rostrum, and they often have the venter depressed in the middle at the base. 
One species has been recorded as having been taken in numbers beneath seaweed on 
the coast of Florida. 
The Central-American forms known to me may be roughly grouped thus :— 
a. Ventral segments 1 and 2 separated bya ner suture ; joint 8 of the funiculus 
strongly transverse . . . . . oe es . . . Species 1-3. 
6. Ventral segments 1 and 2 fused and on a level at the middle, the suture 
indistinct in the centre. 
a'. Joint 8 of the funiculus strongly transverse, nearly as wide as the club. . Species 4, 5. 
b'. Joint 8 of the funiculus much narrower than the club. 
a". Head unimpressed in front. 
a", Rostrum gibbous towards the base; prothorax with large smooth 
spaces on the disc, nodose and fasciculate . . . . . . . . . Species 6. 
6". Rostrum regularly arched. 
a’. Rostrum not or feebly constricted at the base. 
a’, Prothorax rounded or obtusely dilated at the sides. 
a’. Prothorax strongly nodose and uneven above; elytra with very 
large tubercles . . . . . - . . » . Species 7. 
6°. Prothorax feebly convex or flattened above ; elytra with smaller 
tubercles. 
a’. Prothorax more or less distinctly nodose, and usually fasci- 
culate, at the apex, disc, and sides. . . . . . . . . Species 8-26. 
bo’, Prothorax without conspicuous nodular elevations, sometimes 
fasciculate on the disc or at the apex. . . . . . . . Species 27-39. 
6°. Prothorax angularly dilated at the sides. . . . . . . « . Species 40, 41. 
6°. Rostrum strongly constricted at the base. 
ce’. Rostrum finely tuberculate or granulate in front of the basal 
constriction. . . . . soe 8 ew ew ew ww ew. .) Species 42-44, 
ad, Rostrum simply swollen in front of the basal constriction. . . Species 45. 
b", Head deeply bifoveate in front . . . . . . . . . « « « « « Species 46, 
1. Anchonus biolleyi, sp.n. (Tab. V. figg. 6, 6a, 2.) 
Oblong-ovate, robust, black, the tarsi obscurely rufescent ; the sete fine and extremely short. Rostrum (¢) 
stout, curved, cylindrical, coarsely, closely punctate, (@ ) slightly thickened towards the base and with 
the apical portion not so coarsely punctured; joints 7 and 8 of the funiculus transverse, 8 much wider 
than 7. Prothorax about as broad as long, rounded at the sides, widest a little before the middle, and 
narrowing thence to the base and apex, and constricted in front; the surface irregularly granulate, except 
along a narrow smooth space down the middle and a smaller space between this and the margin, the base 
and flanks sparsely punctate. Elytra ovate, convex, much wider than the prothorax; coarsely seriate- 
punctate, the interstices 2-7 each with a few large, rounded, setigerous tubercles, which become smaller 
towards the base and on the apical declivity, the humeri angular and projecting beyond the hind angles 
of the prothorax. Beneath densely rugulose and with scattered shallow punctures, the ventral segments 
