1914.] NATURAL SCIENCES OF PHILADELPHIA. 123 



Female with the general color varying from sulphine yellow to 

 >cosse green, the dorsum of the abdomen in intensive individuals 

 Tanging to dilute raw sienna. The pronotal wash is only indicated 

 in the extreme intensive condition, never as extensive as in the male 

 and only solid on the occiput and the cephalic half of the pronotal 

 disk. Pale pattern in the extreme recessive type but faintly indicated 

 .on the head and pronotum, in the extreme intensive condition much 

 .as in the male, but the transverse edgings to the abdominal segments 

 are narrower and decidedly beaded by blackish intervals. Marginal 

 iield of tegmina always solidly whitish. Abdominal infuscation 

 represented only in intensive specimens by blackish areas of variable 

 size placed dorso-laterad at the bases of the segments. Antennae 

 ■varying from apricot yellow to ochraceous orange. Ovipositor of 

 the general color, strongly olive green distad, edged there with 

 blackish brown, the dorsal margin of proximal half washed with 

 ;raw sienna. Limbs of general color, in the intensive extreme ap- 

 proaching viridian green proximad on caudal femora, distad on same 

 sulphine yellow, distal infuscation usually present only in the inten- 

 sive individuals;^^ tibiae of the general color, distal extremity of the 

 same and tarsi touched with buffy brown. 



The type is an average male, while the allotype is an extremely 

 intensive female. In the Lyford series we have both extremes in 

 both sexes and every intermediate, so it is evident that the color 

 variation has no geographic significance. 



Distribution. — This large species is known from seven localities 

 in the Rio Grande Plain of Texas {vide Bray), its range extending 

 .east to Corpus Christi, south to Lyford, north to Wades and CotuUa, 

 and northwest to Carrizo Springs. Its distribution probably 

 extends south of the Rio Grande into Mexico, but we have no material 

 from that country. Its vertical distribution is limited, extending 

 from or near sea-level at Corpus Christi and Lyford to about seven 

 hundred and fifty feet at Carrizo Springs. 



Biological Notes. — The present species, from data on the specimens, 

 was taken on cotton at San Diego (nymphal individuals) and on 

 prickly pear (Opuntia) at Hebbronville and Alice. At Lyford we 

 found the species fairly common but somewhat local in fields of high 

 weeds, which had a low cover of sand spur (Cenchrus) and grasses. 

 Its stridulation, which was heard at night and with the aid of which 

 .specimens were taken, is very faint. 



-^ One exception, a recessive female from Lyford has them indicated. 



