OLIBRUS.—EUSTILBUS. 253 
with the thick club of the antenne, will facilitate its recognition. We have received 
only one example. 
13. Olibrus latipes, sp. n. 
Rotundato-ovalis, valde convexus, nitidus, rufo-testaceus, antennis pedibusque testaceis ; antennarum clava lata ; 
pedibus latioribus. 
Long. 2 millim. 
Hab. Panama, Volcan de Chiriqui 3000 to 4000 feet (Champion). 
Antenne short, with very broad club, the penultimate joint strongly transverse. 
Thorax finely margined at the base. Elytra with a sutural stria, and distinct series 
of fine punctures. 
This species agrees with O. microsternus not only in its unusually broad antennal club, 
but also in the narrowly separated front coxe, in strong contrast to the widely separated 
middle pair; but O. latipes is remarkably distinct by its broad legs, the tibie being 
unusually broad, and the femora very broad, suggesting an affinity with Litolibrus. 
The insect has an appearance very similar to that of some of the smaller Anisotomidee— 
such as Cyrtusa—and probably when it can be thoroughly examined will prove to be 
of a distinct genus. We have received only one specimen. 
EUSTILBUS. 
Olibrus, Sect. **, Erichson, Nat. Ins. Deutsch. iii. p. 120 (1848). 
Olistherus, Seidlitz, Fauna Baltica, p. 157 (1872) (nomen preocc.). 
Stilbus, Seidlitz, loc. cit. p. 85. 
The separation of these insects from Olibrus by Seidlitz was, I think, an improve- 
ment. Unfortunately the name he adopted was in use in Coleoptera, and he therefore 
changed it to Stilbus; but as Stilbwm is in use in Hymenoptera, and as the two 
names are not sufficiently distinct—the two, indeed, being actually the same in several 
parts of their declensions—it is desirable to make a change before Seidlitz’s name 
comes into general use. | 
Eustilbus occurs in Europe and North America, but I can give no information as to 
whether any of the species described as Olibrus from other parts of the world should 
be referred to it. Eustilbus apicalis appears to be sufficiently congeneric with the 
European forms of the genus, but I doubt whether some other of the species I ascribe 
to Eustilbus can ultimately remain in it, the elongation of the second, and the abbre- 
viation of the first, joint of the hind feet being extreme in L. distinctus. 
1. Eustilbus apicalis. 
Phalacrus apicalis, Melsh. Proc. Ac. Phil. 1. p. 102. 
Olibrus apicalis, Lec. Proc. Ac. Phil. 1856, p. 17. 
Hab. Norra America, North Carolina, Arizona (Morrison) —Mextco, Northern 
