136 RHYNCHOPHORA. 
aaat+. Antenne entirely reddish-yellow in the male, 
dark with the base reddish-yellow in the female; 
elytra not strongly dilated behind . . 
bbh+. Antenne black in both sexes ; elytra strongly 
dilated behind, pear-shaped . . 
eee. Thorax with an impression or channel distinct at base 
only, and rarely reaching middle.* 
aaa*, Jarsi with the first joimt much longer than the 
second, as long as or longer than the other 
joints taken together ; legs very long . 
bbb*. Tarsi with the first joint shorter than the rest 
taken together, but considerably longer than the 
second, 
aaat. Head longer than broad ; eyes oval, less promi- 
HE so Ae ROMEO OF eC 
bbb}. Head broader than tong ¢ ; eyes a rounded, more 
prominent . . Cua) settee: frome carerd 
ecc*. Tarsi with the first joint about as long as, or 
slightly longer than, second. 
aaat. Elytra blue or greenish- blue. 
auat. Elytra elongate, size opiate 3 thorax closely 
punctured . . aire 
bbbt. Elytra not elongate ; 3 size smaller. 
aaaa. Punctuation of thorax stronger and less close ; 
pubescence not distinct . . ..... + 
bbbb. Punctuation of thorax finer and very close ; 
pubescence very distinct. . . .- . 2... - 
bbb}. Body black or leaden-black. 
aaat. Hind body much dilated, pear-shaped. . . 
bbbt. Hind body not, or comparatively slightly, di- 
“lated or pear-shaped. 
anaa. Orbits of eyes furnished beneath with a border 
of whire hairs ; oe often with a slight bronze 
reflection . 
bbbb. Orbits of eyes not furnished ‘beneath with a 
border of white hairs; elytra without bronze re- 
flection. 
aaaa*, Scutellum long, rectangular ; size large ; 
(insect closely resembling 4. melilotz, sg in 
colour) . 
bbbb*. Scutellum short, usually rounded or trian- 
gular. 
aaaat. Thorax plainly longer than broad. 
aauat. Thorax distinctly narrowed in front ; 
elytra somewhat dilated behind; size 
larger. . 
bbbbt. Thorax subeylindrical with ‘the sides 
subparallel ; size small. 
| Apion. 
A, ERvVI, Kirby. 
A. strIatUM, Marsh. 
A. vVorAX, Herbst. 
A. GYLLENHALI, Kirby. 
A. uNICcOLOR, Kirby. 
(afrum, Gyll.) 
A. MELILOTI, Kirby. 
A. LIVESCERUM, Gyll. 
(reflecum, Gyll.) 
A. WatrTont, Steph. 
(Curtisi, Boh.) 
A. IMMUNE, Kirby. 
A. sIMILE, Kirby. 
A, SCUTELLARE, Kirby. 
A. Lot!, Kirby. 
* This character, as a rule, is a very good one, but in one or two species (e.g. 
. Gyllenhali, and in the preceding group 4. Spencet) i is somewhat unsatisfactory, 
as the impressions and channels sometimes vary in different specimens of the same 
insect; 1 cannot, however, find a more evident or reliable character on which to 
separate these groups. 
