ORTHOPLEURA. 185 
sides. This genus, therefore, is allied to Ichnea on one side, and to Pyticera and 
Platynoptera on the other. The tarsi are short, four-jointed, and the basal joint is 
not entirely hidden; the remark, therefore, in Lacordaire that it has the structure of 
the tarsi of Hnoplium is based on an error. The type of Orthopleura is O. damicornis : 
with this Spinola has associated the European O. sanguinicollis; an examination of 
its antennz, no less than of other parts, has satisfied me that it cannot properly be 
retained there. I therefore regard the genus as exclusively American. M. Chevrolat 
has described a species from Brazil; I have not seen it. The genus is only known to 
me from the northern continent. 
1. Orthopleura damicornis. 
Tillus damicornis, Fab. Ent. Syst. Supp. p. 117'; Syst. El. i. p. 282. 
Orthopleura damicornis, Spin. Mon. ii. p. 80’, t. 42. f. 4. 
Orthopleura bimaculata, Melsh. Proc. Ac. Phil. ii. p. 307 °. 
Orthopleura punctatissima, Chevy. An. Soc. Ent. Fr. 1848, p. 34. 
Enoplium thoracicum, Say, Journ. Ac. Phil. iii. p. 188°; Am. Ent. iii. t. 41. 
Pelonium pennsylvanicum, Chevr. Rev. et Mag. Zool. 1874, p. 74°. 
Hab. Norta America !?, Pennsylvania 345 6—Muxtco (coll. Gorh.). 
2. Orthopleura suturalis. 
Orthopleura suturalis, Chevr. Rev. et Mag. Zool. 1874, p. 77’. 
Hab. Mexico}, 
I have the type of this fine species before me ; it is twelve millimetres in length, and 
is more shining, being less pubescent, than any of the other species. It is pitchy black 
above, rufous beneath, and with the legs, the base of the antenne, the suture broadly, 
and a narrow arcuate fascia behind the middle pitchy red. The antenne are less hairy 
than in other species; but the elongate third joint and the short tarsi are characteristic 
of the genus. ‘The type is the only specimen I have seen. 
3. Orthopleura binotata. 
Densius pubescens, nigra, capite prothoraceque rufis, hoc lateribus maculisque duabus basalibus, illo palpis, 
mandibulis et antennis nigris. Long. 34-9 millim. 
Hab. Mexico, Juquila (Boucard, coll. Sallé); GuatzMaua, Pantaleon, Zapote 
(Champion). 
Head rufous in the middle above and beneath, black at the sides. Thorax with 
shining yellow pubescence, conspicuous in three lines, one on each side and one in the 
middle; punctuation hardly visible, very fine and hidden by the pubescence. Elytra 
much less shining than in 0. damicornis: in the example from Juquila there is a very 
faint trace of the transverse fascia; but they are dull black, without any fascia in the 
other examples. | 
BIOL. CENTR.-AMER., Coleopt., Vol. III. Pt. 2, January 1883. 2B 
