132 GEO. H. HORN, M. D. 



SPH^ERIUS Waltl. 

 S. politus, black, polished, entirely smooth, nearly hemisijherical. Thorax 

 broader than long, narrower in front, sides feebly rounded. Beneath smooth, 

 polished ; femora paler. Length .0.3 inch. 



Visalia, California. Mr. W. M. Gabb. 



This insect is another of the interesting discoveries made by Mr. 

 Grabb and is, with the exception of a few Trichopterygidae, the small- 

 est insect ever collected in that pi-olific State. It adds an entirely new 

 form to our f;iuna, and in accordance with the usual distribution of 

 genera, leads us to expect a species from the eastern region. Its habits 

 are probably similar to the European species, as specimens of Geori/s- 

 sus (n. sp.) were abundant in the same small collection in which it oc- 

 curred, as also other riparial insects — Psammodim and Si/ncalijptn. 



This insect appears to agree perfectly with the genus to which it is 

 refered, but is nearly double the length of the other species. 



OTHNIUS Lee. 



The species of this genus have already amounted to four in our col- 

 lections, of which two are as yet undescribed ; another has been indica- 

 ted and a provisional name given it, but as no specimens exist, it is 

 decidedly better to drop the name from our catalogues until specimens 

 are found from which descriptions can be made. 



The following table exhibits the relations of the species : 



Antennae and legs brown or black; thorax very densely and coarsely punctured. 



Elytra clouded umbrosus Lee. 



Elytra uniform in color, dark bronze lugubris Horn. 



Antennae and legs pale or testaceous; thorax sparsely jDunctured. 



Short. Elytra banded with yellow fasciatus Bland. 



Elongate. Elytra indistinctly banded mexicanus Horn. 



0. umbrosus Lee. Class. Col. N. A. 103. 



This is the most elongate of our species. The head and thorax 

 rather densely and coarsely punctured. Elytra coarsely punctured, 

 somewhat paler in color than the head and thorax, irregularly clouded 

 with a still paler color, and clothed with whitish hairs irregularly placed. 

 The marginal line of the thorax is not evident at the anterior third of 

 the margin. 



0. lugubris, dark black bronze, uniform in color, head very coarsely and 

 densely punctured. Thorax densely and coarsely punctured, subquadrate, 

 slightly narrowed behind and with two indistinct teeth. Elytra elongate, 

 twice as long as wide, sides subparallel, coarsely and densely punctured, and 

 sparsely clothed with whitish hairs. Beneath black, shining, thorax and pec- 

 tus coarsely but not densely punctured ; abdomen finely and not densely punc- 

 tured, and sparsely clothed with whitish hairs. Legs black, knees and tarsi 

 paler. Length .20 inch. 



