Academy of Science. 61 ally still smaller quantities of free Hydrogen. The appearance of the Light Car-buretted Hydrogen in so lilieral quantities at the lola well, as also the composition of the water brought up by the pulsations of the gas itself, are both maltt-rs of very great scientific interest ; but neither their interest nor their importance are in an}' way augmented by ascribing miraculous properties to the one or an anomalous origin to the other. THE INSECTS OF WALLACE COUNTY, KANSAS. By Prof. F. H. Snow, of the University of Kansas. The Kansas University Scientific Expedition for 1877, in charge of the writer, spent three weeks in camp along the Smokj^ Hill river, about one mile from Fort Wallace. The elevation of this locality, above the level of the sea is about 3,700 feet. Wallace county is the extreme western county of the State, along the line of the Kansas Pacific Railway. The railway station is 420 miles, by rail, from Kansas City, and 319 miles from Denver Our collecting ground was therefore very near the center of the plains, or of what was once known as the Great American Desert. The expedition for 1878 spent one mouth (June 12tli to July 13th) in Gove and Wallace counties. Gove county adjoins Wallace county on the east, and the alti-tude of the railway station at Buffalo is about 3,300 feet above the level of the sea. As the two counties are contiguous, and as their faunal characteristics are appar-ently identical, the collections of both expeditions are combined in one list. Species taken in Wallace county alone, are marked "W"; those taken in Gove county, alone, are marked " G ", and those taken in both counties are not marked for locality. In the present paper, I include only the orders Lepidoptera and Coleop-tera. My assistants in 1877, were Messrs. Richard Foster and John M. Walker; in 1878, Richard Foster and Louis L. Dyche. To their indefatigal)le industry I am largely indebted for the valuable results of the expeditions. I am also indebted to the kindness of Dr. Jno. L. LeConte, of Philadelphia, for the determination of Coleoptera not previously known to me. LIST OF LEPIDOPTERA: Pieris protodice Bd.-]jcc. G. NaihalU lole Bd. W. Coluis Eiirytheme Bd. Da/Kiis Arehippus Fabr. Argynnis Idalia Drury. G. Euptoieta Claudia Cram. W. Phyciodes Tharos Drury. W. Phyciodes JVycteis Doubl. W. Orapta interrogationis Fab. var. nmbrosa Lintner. Vanessa Antiopa L. W. Pynimeis Atalanta L. Pyrameis cardui L.