1909.] NATURAL SCIENCES OF PHILADELPHIA. 159 



femora pale Chinese orange with a narrow distad area of bice green; 

 cephalic and median tibiae of the general color. Caudal femora of the 

 general color, but rather more yellowish, having a number of bars of bice 

 green, one imperfect proximal one hardly represented on the external 

 face, one premedian, one postmedian and one apical (genicular), 

 these being well indicated dorsad and less laterad, the ventral face 

 uniform greenish-yellow, where the bars cross the lateral carinas there 

 is a tendency to glaucous, which is also found on the distal portion 

 of the genicular region; caudal tibiae glaucous blue with a poorly 

 defined pale pregenicular annulus, spines very pale glaucous with 

 black tips. 



Measurements. 



Length of body, 20 mm. 



Length of pronotum, 4.8 " 



Length of tegmen, 9 " 



Length of caudal femur, 12 " 



The type is the only specimen of this beautiful species seen by us, 

 and was taken from a mesquite which had recently been drenched by 

 heavy rain. No time was available for further search, as our stay 

 w r as limited to a brief train stop. 



HESPEROTETTIX Scudder. 

 Hesperotettix viridis (Thomas). 



Of this beautiful species a series of seventy specimens is contained 

 in the collection, of which fifty-three are males, twenty-two females 

 and five immature individuals. The fondness of this species for the 

 patches and larger areas of rabbit weed (Isocoma heterophylla) is very 

 marked, and it usually occurs in abundance where that plant is present. 

 Often in patches of this plant one would notice several specimens of this 

 species sitting on the summit of a single clump. 



At Deming it was very abundant on its food-plant on both sides of 

 the dry bed of the Mimbres, a series of forty-five males, eighteen females 

 and four nymphs being taken July 18. It also occurred in great num- 

 bers in suitable locations between the town and the Florida Mountains, 

 while at 5,000 feet in a canyon in the Florida range it was very scarce, 

 one male and two females being taken. At El Paso it was taken in the 

 low country along the Rio Grande, four males and two females being 

 secured on July 11. On the usual food-plant at Aden, July 21, one 

 male and one female were taken, while one adult male and one nymph 

 were collected at Silver City, July 20. 



Of this large series thirty show no distinct blackish markings on or 



