41 



most interesting contribution to onr present knowledge of vibratory 

 motion and tlie possibilities of electricity, the same writer remarks:* 



The discovery of ca received sensitive to cue set of wave lengths and silent to 

 others is even now partially accomplished. The human eye is an instance supplied 

 by nature of one which responds to the narrow range of electro-magnetic impulses 

 between the three ten-millionths of a millimeter and the eight ten-millionths of a 

 millimeter. It is not improbable that other sentient beings have organs of sense 

 which do not respond to some or to any of the rays to which our eyes are sensitive 

 but are able to appreciate other vibrations to which we are blind. Such bein"-s 

 would practically be living in a different world from our own. Imagine, for 

 instance, what idea we should form of surrounding objects were we endowed with 

 eyes not sensitive to the ordinary rays of light, but sensitive to the vibrat.ons con- 

 cerned in electric and magnetic phenomena. Glass and crystal would be among the 

 most opaciue of bodies. Metals would be more or less transparent, and a telegraph 

 wire through the air would look like a long, narrow hole drilled through an imper- 

 vious solid body. A dynamo in active work would resemble a conflagration, while 

 a permanent magnet would realize the dreams of medi;eval mystics and become an 

 everlasting lamp with no expeuditure of energy or consumption of fuel. 



In some parts of the human brain may lurk an organ capable of transmitting and 

 receiving other electrical rays of wave lengths hitherto undetected by iustrumental 

 means. These may be instrumental in transmitting thought from one brain to 

 another. * * * 



A NEW SPECIES OF PEZOTETTIX. 



By Lawrence Bruner, Lincoln, Nehr. 



Among the locusts found most abundantly in the valley and hill- 

 sides about Grand Junction, Colo., while on a trip to that region during 

 the month of June, 1893, was an undescribed species of the genus 

 Pezotettix. This locust bears some resemblance to MeJanoplus turn- 

 huUi Thos,, but unlike that species has very short and rounded 

 tegmina. It resembles that species also in its food habits, seeming to 

 confine its attention almost entirely to the various species of i)lants of 

 the botanical family Chenopodiacecc, which abound in the regions where 

 it occurs, being particularly fond of the grease wood {Sarcobatts ver- 

 micularis). 



In my annual report as special agent of the Division of Entomology, 

 l)ublished in Bulletin Ko. 32 of the Division, I have mentioned this 

 insect as Pezotettix chenopodU. The following description is given: 



Pezotettix chenopodii n. sp. 



A compact, short-limbed species related to and having the general appearance of 

 the Caloptenus turnbuUi of Thomas. General color testaceous olive-gray with mark- 

 ings of dark brown upon occiput, disk and sides of pronotum, sides of basal segment 

 of abdomen and hind femora; the dark dorsal line of pronotum with a narrow paler 

 one along its middle, as in the various species of Hesperoieiiix. Hind tibi;e varying 

 from pink to pale glaucous, usually the latter, with pale annulus near base. 



Head moderately large, eyes large but not prominent, separated above by the 

 slightly sulcate depressed vertex, which is nearly as wide as the frontal costa; 



* Some Possibilities of Electricity. — Fortnightly Eeview, March, 1892. 



