1909.] NATURAL SCIENCES OF PHILADELPHIA. 151 



The Silver City male and the three individuals of that sex from 

 Deming are quite small when compared with the El Paso series. 



The series from sand areas at El Paso is uniformly more ashy gray 

 than any other specimens of the species examined. The Aden series 

 is quite dark when compared with the El Paso representation, while 

 one female is strongly washed with rose red, particularly on the dorsum 

 of the pronotum where the pink color is almost pure. The remarks 

 previously made by the authors 16 regarding the variability of the color- 

 ation of the anal area of the tegmen and of the fuscous bar of the wings 

 in this species also apply to the series examined in this connection. 



This is the first record of the species from the State of Texas. 



TRIMEROTROPIS St&l. 



Trimerotropis texana (Brunei-). 



This interesting species was taken at all the purely Lower Sonoran 

 localities visited in southern New Mexico and extreme western Texas. 

 At El Paso it was found, July 10 and 11, rather sparingly in the broken 

 country at the foot of the mesa northeast of the city, on the bare spots 

 in the greasewood-covered mesa and in a dry stream bed in the irri- 

 gated section along the Rio Grande, six males and one female being 

 taken in the several situations. A single female was secured in the 

 street under an arc light the evening of July 12 at Alamogordo, while 

 one male was captured among greasewood at 4,900 feet elevation in Dry 

 Canyon, Sacramento Mountains, July 13. At Aden, July 21, in grass 

 prairie land and in dry grass, five males and three females were secured, 

 while a single male was taken at Lanark, Donna Ana County, New 

 Mexico, during a train stop on July 18. Three males and two females 

 were secured in the yucca-dotted sand waste along the Mimbres River, 

 north of Deming, July 18. This species was always found sparingly and 

 specimens were invariably collected singly. Although much slower of 

 flight than T. vinculata, this species has a peculiar habit of delaying its 

 flight until the net had passed over it, making it more difficult to 

 capture. Protective coloration appears to be a considerable factor 

 in the life of individuals of this species, its habitat being the barest 

 spots to be found in the region in which it occurs. 



There is considerable variation in size, even in specimens from the 

 same environment, and the coloration exhibits a tendency toward 

 predominating grayish-white tones in one direction and reddish- 

 ochraceous in the other. The specimen from Lanark is ochraceous- 

 buff in the general tone of all except the tegmina. The caudal angle 



16 Proc. Acad. Nat. Set. Phila., 1908, p. 388. 



