179 SERRICORNIA. [ Tarsostenus. 
tion ; one species alone, however, is found in Europe ; it appears 
chiefly to differ from Opilo in the finer granulation of the eyes, and the 
formation of the tarsi, but is hardly distinet from this genus. 
T. univittatus, Rossi (Opilus fasciatus, Steph.). Elongate, black 
or fuscous black, villose, shining, with a transverse whitish or whitish- 
yellow fascia on each elytron not reaching suture ; antenne ferruginous, 
fuscous towards apex; head thickly punctured; thorax longer than 
broad, narrower than elytra, coarsely and sparingly punctured, but 
smooth on central line which is more or less furrowed; scutellum finely 
punctured ; elytra long, very coarsely punctured, with the punctures 
almost confluent in places ; legs ferruginous with ee base of the 
femora black. L. 5-6 mm. 
On flowers, &c.; very rare; two specimens were recorded by Stephens and Curtis 
as taken by Mr. Shillingford i in the woods near Winchmore Hill, Kent, and it has 
occurred much more recently on the Cotswold Hills, Gloucestershire ; it seems, how- 
ever, to be a question whether it can really be considered to be truly indigenous. 
THANASIMUS, Laitreille. (Clerus, auct.; Cleroides, Schiffer.) 
There appears to be at present considerable confusion as to the 
nomenclature of the genus Clerus; in the catalogue of Hey len, Reitter, 
and Weise the name is applied to T'richodes, Herbst. ; wh le Cleroides, 
Schiffer, includes Pseudoclerus, Duv., Pseudoclerops, Duv., Thanasimus, 
Latr. (containing two species, 7. form carius and T. rufipes), and 
Allonyx, Duv. Curtis and Stephens both include 7. form carius under 
Thanasimus rather than under Clerus, but in all our modern catalogues 
it has been referred to the latter genus; there appears to b> but little 
real difference between the two genera, and by some au hors (e.g. 
Kiesenwetter, Naturgesichte der Insect. Deutsch. iv. p.683) they appear 
to be regarded as synonymous ; in Clerus, however, the posterior tursi 
are rather broadly dilated, whereas in Thanasimus they are slender and 
longer; they are rather extensive genera, and of almost universal dis- 
tribution in warm and tropical countries; the larva of 7’. formicarius 
is described by Ratzeburg, Forst. Insecten, pl. i. f. 17), and, together 
with the pupa, is figured by Westwood (Classification, 1. p. 262, fig. 29, 
15); itis of a dark pink colour, with a pitchy head and prothorax, 
and two pitchy spots on the meso- and metathorax ; it feeds on wood- 
feeding larvee; the pupa, like the larva, is hairy, and is terminated at 
apex by two comparatively long cerci. 
T. formicarius, L. (Clerus formicarius, auct.). Elongate, de- 
pressed, anterior parts clothed with long pilose hairs; head large, 
black, coarsely punctured, eyes finely granulate, antenne black, last 
joint with the apex ferruginous ; thorax about as long as broad, red, 
with the anterior portion (which is divided by a broad \-shaped 
furrow from the posterior portion) black, coarsely punctured, posterior 
