1909.] NATURAL SCIENCES OF PHILADELPHIA. 161 



appendages being slenderer and not as robust distad as figured by 

 Scudder, although the general form remains essentially the same. 

 There is also a slight variation in the shape of the tubercle of the sub- 

 genital plate. 



In color, as pointed out by Scudder and Cockerell, 21 there is pro- 

 nounced variation, although its description may be simplified by con- 

 sidering the green form one extreme and the full brownish and ochre 

 form the other, leaving numerous specimens as intermediates between 

 the two. The full green phase, having all the dark markings green 

 and the lighter ones yellowish-green, is represented in our material 

 by five males and one female, although closely approached by five 

 other females. The full brown phase is represented by six males and 

 one female, the remainder of the series being intermediate in coloration. 

 The green phase was noticed chiefly among tall green weeds, while 

 the brown phase was usually found in much fewer numbers upon the 

 tornillo or screw bean. The tegmina are distinctly though not sharply 

 maculate in eight specimens and unicolorous in six, the remainder 

 having the anal vein marked more or less completely with a pale line. 

 There is also a considerable amount of variation in the depth of the 

 glaucous color of the caudal tibiae. 



The species has been recorded from Las Cruces and Mesilla Park, 

 Donna Ana County, New Mexico. 



MELANOPLUS Still. 

 Melanoplus bowditohi Scudder. 



This species is represented in the collection by three males and eight 

 females, taken as follows: El Paso, July 10 and 17 (1 d\ 2 9); 

 Aden, July 21 (1 d\ 4 9 ) ; Albuquerque, September 14(19) ; Deming, 

 July 18 (1 d\ 1 9 ). At El Paso it was taken at the edge of the grease- 

 wood-covered mesa and from mesquite growing in the sandhill country 

 east of the city. It frequented cultivated ground at Albuquerque, was 

 taken in grass prairie land at Aden and frequented the mesquite and 

 rabbit-weed plain at Deming. 



In actions the species is extremely vigorous and alert, usually making 

 long flights. But one of the specimens approaches anyway closely the 

 type of coloration seen in individuals of the species from eastern Colo- 

 rado and southwestern Nebraska, this individual being from mesquite 

 at El Paso. The majority of the series are duller with umber browns 

 the predominating colors, the postocular bar not strongly marked in 

 two specimens and nearly obsolete in one. The bars on the dorsum 



21 Proc. Davenp. Acad. Sri., IX, pp. 41-42. 

 11 



