90 



PSYCHE. 



[August, itjoo. 



diff'crcntlaUs passes through the last 

 moult. 



PlIOETAI.IOTES. 



P. ncbrascencis lihofi. — Four speci- 

 meus from Ford county, two of each 

 variety ( /•". n. nebrasccitcis and /'. n. 

 volucris) . Structiu'al characteiistics 

 conform well with the description, 

 except that in three of the four cases 

 the fastigiuni is plainly silicate. The 

 other specimen — /'. ;/. )!ebrascc7icis 

 corroborated the description of Scud- 

 der. Prosternal spine not "erect" 



but slightly recumbent. Extremity of 

 male abdomen only feebly clavate. 



In the short winged variety P. n. 

 nebrascencis, the two specimens at 

 hand show marked variation in teg- 

 mina ; alike in width, they differ in 

 length, and in the form of distal extrem- 

 ity. The specimens agree in size, 

 but tegmina are six and nine mm. in 

 length respectively. The shoiter teg- 

 mina end more abruptly and the apex 

 is more acute than in the longer wing. 



Two males of each variety from Ford 

 Co., Ji'ly- 



THE CLEAR-WINGED SPECIES OF THE OEDIPODINE GENUS 



MESTOBREGMA. 



BY SAMUEL H. SCUDDER, CAMBRIDGE, MASS. 



Most of the described species of the 

 genus Mestobregma, like the type of the 

 genus, have the wings distinctly crossed 

 mesially by a fuscous band of greater or 

 less width. In one species, however, j1/. 

 kiowa Thom., the wings are pellucid, 

 except for the fuscous veins and for the 

 occasional faint clouding of the wings at 

 the normal point for the band, or the 

 heavier infuscation of the cross-veins in 

 this region. 



In the collections brought from the 

 Pacific coast by Mr. A. P. Morse, are 

 three species of the genus with wings 

 showing at most no greater indication of 

 a cross-band than in the species men- 

 tioned ; indeed one of them is that spe- 

 cies, which has never before been record- 



ed from west of Utah. They were found 

 in successively more southern regions. 

 The broad-winged form, M. kiowa, was 

 obtained only in northern California near 

 Mt. Shasta. The narrow-winged species 

 occurred, one, M. hyalhium, in the San 

 Joachin valley from the latitude of San 

 Francisco to that of Los Angeles, the 

 other, M. rosaceiim, from the southern 

 edge of the San Joachin valley to Yuma, 

 Arizona. 



The species may be separated as fol- 

 lows : - - 



Table of tlic clear-winged species of 

 Alestohregina. 



a'. Median carina of pronotum nearly 

 obliterated between the sulci, here no 



