Deep orange, robust, beautifully polished; head orange; cephalic segment small, sparsely subprofoundly punctate; antennæ short, pilose; mandibles very sparsely pilose, very indistinctly quadridentate, each with a single rather large tooth (sometimes two); labium subprofoundly punctate, anteriorly emarginate, medianly canaliculate; feet compressed, on each side (in male?) 55.
G. brevicornis, Wood, Journ. A. N. S., 1863, p. 45.
The scuto-episcutal sutures are very distinct, as are also the sterno-episternal. The scuta generally are quite smooth. The body of each of the specimens is subcylindrical. I was at first disposed to consider these as the males of the following species, but it seems most probable that they are distinct. The principal differences are found, first, in the size of the cephalic segment and length of antennæ; second, in the punctations of the head; and finally, in the number of segments and robustness of body. Length, 2 inches.
Hab. Illinois, R. Kennicott; Texas, E. B. Andrews.—Smithsonian Collection.
G. lævis.
G. aurantiacus, modice robustus; linea mediana dorsali, duplici, nigra, passim obsoleta, ad segmentum penultimum ducta; capite modice magno, leviter punctato, segmento basali breve; antennis sparse pilosis; labio saturate aurantiaco, nonnihil convexo, sparse leviter punctato, medio valde canaliculato, antice emarginato; mandibulis haud denticulatis; suturis scuto-episcutalibus modice distinctis; pedibus utrinque 53; superficie ventrali linea mediana unica, obsoleta, nigra; sternis suturis et depressione mediana impressis.
Orange, rather robust; dorsal median line double, black, here and there obsolete, reaching to the penultimate segment; head rather large, lightly punctate; basal seg-nent short; antennæ sparsely pilose; labium deep orange, somewhat convex, sparsely lightly punctate, medianly strongly canaliculate, anteriorly emarginate; mandibles not denticulate; scuto-episcutal sutures rather distinct; feet on each side 53; ventral surface with a single, obsolete, black, median line; sterna impressed with sutures and a median depression.
G. lævis, Wood, Journ. A. N. S., new series, vol. v, 1863, p. 44.
The cephalic segment has the sides moderately arched, with the anterior angles very strongly rounded. The dorsal median line is entirely wanting on the anterior portion of the body. The feet generally are without any hairs, but there are a few on some of them. There are two specimens in the Museum of the Academy, collected in Georgia by Dr. J. L. Le Conte.
G. bipuncticeps.
G. dilute aurantiacus, gracilis, venuste politus; segmento cephalico saturate aurantiaco, magno, antice leviter emarginato, et labio mandibulisque profunde punctatis; antennis modice longis, dense pilosis, antice fere pubescentibus; labio leviter emarginato (interdum obsolete), medio canaliculato; mandibulis magnis, crassis, interdum indistincte quadridentatis, singula denticulo unico (interdum duobus) modice magno; pedibus brevibus, sparsissime pilosis, utrinque (in mare?) 61, (in femina?) 63.
