1909.] NATURAL SCIENCES OF PHILADELPHIA. 163 



flavescens by Scudder. A number of specimens are typical of flaves- 

 cens as far as the cerci and furcula are concerned, but a careful study 

 of this large series of eighty-one specimens shows that the slight genital 

 characters and the color of the tips of the antennae, of the pronotum 

 and of the caudal tibiae, given specific importance by Scudder to separ- 

 ate M. herbaceus and flavescens, are by no means specific and can be 

 considered only individual, the extremes being connected by a number 

 of intermediates. 



In color we find two quite distinct extremes connected by inter- 

 mediates, one extreme being uniform light green with the postocular 

 bar subobsolete or entirely lacking, the other various shades of brown, 

 touched with yellowish around the head and along the ventral border 

 of the postocular bar which is quite distinct. Numerous intermediates 

 show the postocular bar distinct with green the general color, others 

 with yellowish and yellowish-brown the general color. The antennae 

 are usually not infuscate at the tips in the green phase, the majority 

 of the other specimens having a more or less distinct apical inf uscation. 

 The caudal tibiae are generally some shade of glaucous, varying con- 

 siderably in depth, but a few specimens have a decided greenish tone 

 to these parts. 



The species has previously been recorded from El Paso, Texas, and 

 Las Cruces, Mesilla Park and Albuquerque, New Mexico, while Scudder 

 and Cockerell have assigned specimens from Mesilla and Mesilla Park 

 to M. flavescens. 



Melanoplus glauoipes (Scudder). 



At El Paso this peculiar species was found in small numbers in 

 thickets of screw bean or tornillo growing in the low river-land, where 

 on July 10 one male and three females were taken. Two females were 

 also secured on July 10 and 11 from mesquite, while one male and three 

 females were taken, July 17, from mesquite thickets in the sand region 

 east of the city. A single female was taken at Clin, Uvalde County, 

 Texas, July 8, in a damp weedy location. The species is a vigorous 

 one and at El Paso it was extremely difficult to capture, owing to its 

 habit of seeking shelter by retiring to the thickest portion of the 

 mesquite or tornillo bush on which it was found. In such surroundings 

 a net was useless and work with the hands paid a penalty of thorn 

 stabs sufficient to deter any but an enthusiast. It was impossible to 

 flush specimens into the open, as the insects merely shifted their position 

 to another portion of the bush. 



There is a considerable amount of variation in the shade of the 

 dorsum of the head, pronotum and anal area of the tegmina, face, 



