Apion.| RHYNCHOPHORA. 131 
Bedel, gc.), Hookeri, brunneipes, Bedel, &c. (levi- 
gatum, Kirby), 
Labiate: (Mentha) flavimanum ; (Thymus) atomarium, 
Staticaceee: Limonit. 
Polygonacee: (Rumex) miniatum, cruentatum, sanguineum, frumen- 
tarium (hematodes), rubens ; violaceum, hydrolapathi, 
curtirostre (= humile, Germ.), &c. 
Buxacee: (Mercurialis), semivittatum, pallipes. 
Urticacer: urticarium (vernale). 
Salicacee : minimum. 
With regard to A. simile there seems to be a doubt; it is found, 
according to M. Bedel, exclusively on Betula (birch), but its habitat in 
the larval state is unknown. 
Owing to the number of species comprised in the genus it is very 
difficult to form a satisfactory table ; at the same time the differences, 
although in many cases comunparative, are, as a rule, easily appreciable, so 
that the genus is not in reality as hard as many others that contain 
fewer species ; in constructing a dichotomous table, however, to comprise 
many species, the difficulty lies in finding leading characters on which to 
divide off groups or series that run more or less into one another; as has 
been before remarked, the older writers on Apzons, such as Kirby, Walton 
and others, divided the genus into larger or smaller groups on the distance 
of the insertion of the antennze from the base of the rostrum; this 
character, although most useful in some cases, is very confusing in others, 
and appears to be abandoned by the latest writers ; I have, to a consider- 
able extent, although not altogether, followed Bedel’s classification (1. c. 
p. 205), but it must be admitted that some of the characters are not 
altogether easy of appreciation, and the table given below must be 
regarded merely as a guide tothe detailed descriptions and not as a sub- 
stitute for them. In his catalogue of the species Bedel (1. ¢. pp. 360 e¢ 
seqq.) divides them into seventeen groups; some of these are of course 
very marked, but others appear to be made up of rather discordant 
elements and might with reason be further subdivided. 
I. Rostrum narrowed towards apex, wedge-shaped or subulate; 
eyes large and very prominent. (Ozystoma, Dumeril, nec 
Stephens). 
i. Upper surface blue; size larger; sutural stria abridged in 
poh ont and scarcely passing the apex of scutellum . . . .. A. PoMoNn#, F. 
i, Upper surface black or slate-coloured ; size smaller ; sutural 
stria of elytra not abridged in front and continued to base. 
1. Rostrum strongly and angularly gibbose beneath ; antennz 
entirely red in the male, more or less broadly black towards 
apex infemale. . . . A. cracom, ZL. 
2. Rostrum slightly or comparatively slightly gibbose beneath ; 
antenne black in both sexes, with the exception of one or 
two joints at base. 
A, Rostrum abruptly subulate. 
K 2 
