EUCNEMII)^. 
273 
The following new genera and spp. are described by him * 
Potei'gus, p. 110. Somewhat intermediate between Tharops and Gastrau^ 
lacus, having the elongate narrow form of the former, and metathoracic and 
abdominal furrows for reception of the tarsi as in the latter. P. jiUformisi 
p. Ill, Dorey, N. Guinea, 
DiomuSj p. 118. Indicates Gastraulacus by its cylindrical form, and ap- 
proaches Euryostus in its abbreviated metasternal furrow. 7). singularisy 
p. 119, pi. 26. f. 6, Brazil. 
Lamprotrichus^ p. 120. Differs from Galhodema in its little metasternal 
furrow, uniting certain chtaracters of Etiryostus and Arisus, and affording a 
passage to Diomus ; also with facies of Dendrocharis^ but with tarsi non- 
lamellate, &c. Z, ((7a/6o7.) Blanch. 
EuryostuSj p. 123 (no differential characters given). E. reichu, sp. n., 
p. 124, pi. 6. f. 6, Java, Malayan peninsula, Singapore ; hypoaita, p. 125, 
Malacca; inopinatus, p. 126, Singapore. 
Arisus, p. 127. Differs from Euryostus in the plane outer surface of its 
mandibles, its head being either non-carinated or very slightly so, the sharp 
post, angles of its thorax, and the distinct emargination of the upper apex of 
the fourth joint of its tarsi. A, carinulatus, p. 120, and a(\jxmctm, p. 130, 
Java and Sarawak; castelnmii, p. 132, Malayan peninsula; wicardi and 
orientalis, Oast. {Galha) ; depressus, p. 136, Melbourne. 
Idiotarsus, p. 137. Distinguished from the two preceding genera by the 
structure of its antennae and tarsi, its prosternal sutures forming a distinct 
sunken line, &c. J. vestitus, p. 139, pi. 6. f. 9, S. Paulo ; sulcicollis, p. 140, 
and muticus, p. 142, R. Janeiro; concretus, p. J41, pi. 6. f. 1, Brazil ; tricari’- 
natus, p. 143, ih. f. 2, Cayenne and Brazil. 
PcRcilochrus, p. 148. Facies of Stethon, from which the structure of its 
inetasternum and tarsi removes it, and really more allied to Eucnemis, which 
it does not resemble. P. vittatus, p. 150, pi, 6. f. 3, Ega ; grossicollis, p. 161, 
Madagascar ; piceus and exiguus, pp. 152 & 153, Sarawak. 
Arganus, p. 168. No prosternal suture. A. distinetus, p. 159, Ceram and 
Mysol. 
Thamhus, p. 160. Somewhat like Eucnemis and Dromceolus, but with the 
metasternal furrow wanting on the outer side of the coxfe, and the triangle 
of the propleurae much shorter ; pronotum laterally hollowed. T. agilis, 
p. 162, pi. 6. f. 6 , inexpectus, p. 163, ih. f. 7, and p. 165, ih. f. 8, Cor- 
dova (Mexico) ; frivaldszidi, p. 166, ih. f. 9, Slavonia ; dexyrollii, p. 168, pi. 7. 
f. 1, Brazil ; diversus, p. 169, ih. f. 2, Petropolis, U. S. A. 
Deltometopus, p. 171. Slightly resembling Microrhagus in facies and 
structure of antennae. D. fallax, p. 174, similis, p. 178, and indoeilis, p. 188, 
Brazil; p. 175, R. Janeiro; fuscipes, p. 177, pi. 7. f. 3, Colombia and 
Caraccas ; alacer, p. 180, ih. f. 6, St. Catharine’s ; eonstrictus, p. 184, Brazil, 
R. Janeiro; ereptus, p. 185, Louisiana; fulvicornis foveolatus, Gu^r., and 
amcenicornis, Say, of which clypeatus, Lee., is the 5 (^Euen.). 
Diacerus, p. 189. Distinct from Deltometopus in its much narrower and 
not posteriorly enlarged antennal furrow, and by the very small and subequal 
2nd and 3rd joints of its antennse. D. antennatus, p. 190, pi. 8. f. 1, and gri~ 
sescens, p. 191, ih. f. 2, Mexico. 
Phanerochroeus, p. 276. No differential characters given. P. dimidiati-- 
pennis, p. 276, pi. 12. f. 8, Ega. 
1871. [voL. VIII.] 
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