Apion. | RHYNCHOPHORA, 135 
bb*. Body behind thorax broad and comparatively short. 
aat. Shoulders very prominent; size larger. . . . A. VICINUM, Kirby. 
bb+. Shoulders rounded ; size smaller. . . . A. ATOMARIUM, Kirly. 
bb. Sutural striae not prolonged to base of elytra ; a as a 
rule not, or scarcely, passing the apex of scutellum. 
aa*, Rostrum strongly curved, asa rule long and 
slender (but rather short in a few species). 
aat. Interstices narrow, carinate, much narrower 
than the striz, which are strongly aud coe 
punctured (found on Saliz). . . . A. MINIMUM, Herbst. 
bb+. Interstices level or convex, rarely ‘raised, very 
seldom as narrow as the strie. 
aa}. Thorax and elytra glabrous.* 
aaa. Colour of elytra metallic, blue, green, or 
greenish-blue. 
aaa*. Punctuation of thorax shallow and diffuse. 
aaay. Size smalier; elytra more depressed, 
greenish-blue ; fovea at base of thorax not 
strong. A. VIRENS, Herbst. 
bbbt. Size much larger ; elytra ¢ convex, :, deep 
blue; fovea at base of thorax strong . A. PUNCTIGERUM, Payk. 
bbb*. Punctuation of thorax deep and more 
or less close. 
aaat+. Eyes prominent. 
aaat. Head and thorax black, elytra 
deep purplish-blue . . A. PIsi, F. 
bbb. Cojour entirely bright golden 
green or greenish-blue. . . A. ASTRAGALT, Payk. 
bbbf. Eyes not prominent ; head and thorax 
black, elytra deep blue nase tes ee A THORS. Heruste 
(subsulcatum, Marsh.) 
bbb. Colour of upper and under surface entirely 
black. 
aaa*. Thorax diffusely and very finely punc- 
tured, smooth and shining, much ee 
than broad; sizelarger . . A. EBENINUM, Kirby. 
bbb*. ‘Thorax closely and comparatively str ong- 
ly punctured, dull, not much longer than 
broad); size small, <3) 6 = A. FILIROSTRE, Kirby. 
bb}. Thorax and elytra more or less distinetly 
pubescent. 
aaa. Thorax with a central dorsal channel 
extending from base to apex; colour 
leaden; sizerather small . . : A. ononis, Kirby. 
bbb. Thorax with a central dorsal channel 
continued beyond middle, but more or 
less obsolete towards apex, and sometimes 
towards base. 
aaa*, Elytra blue ; forehead with a de- 
pression between eyes; antennz black A. SPENCEI, Kirby. 
bbb*. Elytra black or leaden-coloured ; 
forehead without depression between 
eyes. 
* In A. virens the pubescenee is scarcely visible, and I have therefore placed it in 
this division. 
