Apion. ] RHYNCHOPHORA. 153 
A. radiolus, Kirby (aterrimum, Marsh, orurum, Kirby). This 
species is found in company with the preceding which it much resembles 
in shape, but may be easily distinguished by its more slaty-leaden 
colour and much more evident pubescence, as well as by the absence of 
a frontal fovea; the head and thorax are more finely punctured, and the 
antenne are longer ; the scutellum has two small divergent carine at 
base ; the elytra are more strongly striated and the strie are evidently 
punctured; the legs are moderately long and finely pubescent. L. 24-8 
mm, 
Male with the rostrum thicker and shorter and the anterior tibie 
slightly curved. 
On various species of mallows; usually found in company with the preceding and 
similarly distributed; it has occurred on Tanacetum vulgare and has also been found 
on the holly. 
4. onopordi, Kirby (penetrans, Steph.). Black, with the elytra 
blue-black, blue or greenish, more shining than the rest of the body ; 
pubescence almost absent; head small, coarsely punctured, striated 
between eyes ; rostrum thick, gently curved, slightly dilated near the 
insertion of the antenne ; antenne stout, black; thorax longer than 
broad, with the sides almost parallel, very strongly and coarsely punc- 
tured, the punctuation being more or less confluent, and with a deep 
furrow before scutellum which is very small; elytra oval, moderately 
convex, widened at sides, with strong punctured strie; legs stout, 
moderately long. L, 25-3 mm. 
Male with the head broader than in the female, and with the rostrum 
shorter and thicker and the eyes more prominent. 
On Onopordon acanthium and other species of thistles ; also on certain species of 
Cnicus aud Rumez ; the larva is said to undergo its transformations in the stems of 
Centaurea nigra ; common and generally distributed in England and Scotland, and 
probably in Ireland, 
Group 10. 
Rostrum very strongly dilated on each side at the insertion of the 
antenne (on thistles). 
A. carduorum, Kirby (cyaneum, De G., gibbirostre, Gyll.). 
Elongate, black, elytra slightly bluish or greenish, pubescence more or 
less evident; head finely striated between eyes, which are shghtly 
prominent ; rostrum longer than head and thorax, strongly curved, with 
a large tooth on each side at the insertion of the antenne, finely punc- 
tured and more shining at apex; antenne stout; thorax convex, sub- 
parallel, slightly rounded at sides, moderately strongly punctured, with 
a furrow before scutellum, which is small; elytra with strongly marked 
shoulders, scarcely rouuded at sides which are not widened in middle, 
with punctured strie and flat finely shagreened interstices ; legs black, 
robust, more or less pubescent ; size extremely variable, L. 14-31 mm. 
