1909.] NATURAL SCIENCES OF PHILADELPHIA. 153 



along the river bank in irrigated ground below the city. Here on July 

 10 and 11 four males and five females were taken. A single female 

 was taken under a street arc light at Alamogordo, July 12, while one 

 male was captured in grass prairie land at Aden, July 21. 



This series is quite uniform in size. While but little color variation 

 is noticeable, one female from El Paso is as reddish in general tone as 

 the type, but all the other specimens are more grayish. There is some 

 little variation in the intensity of the subobsolete tegminal bars, and 

 the wing band also appears more blackish than the type. 

 Trimerotropis vinculata Scudder. 



At every locality visited in New Mexico and around El Paso this 

 species was present. From an elevation of less than 1,000 feet at 

 Spofford, Texas, to 8,700 feet at Cloudcroft, every locality yielded 

 this form in greater or less abundance. The series of 112 specimens 

 is distributed as follows: Spofford, Texas, July 8, 1 9 ; near Pecos 

 High Bridge, Valverde County, Texas, July 8, 1 c? ; El Paso, July 10-11, 

 24 6\ 15 9 ; Franklin Mountains, July 9, 7 d\ 5 9 ; Alamogordo, July 

 12-13, 3 J 1 , 1 9 ; Cloudcroft, July 14, 15, 4 tf, 3 9 ; Aden, July 21, 

 27 &, 8 9 ; Deming, July 18, 1 9 ; Florida Mountains, July 19, 1 c?, 1 9 ; 

 Silver City, July 20, 3 d\ 1 9 ; Albuquerque, September 14, 4 d\ 2 9 . 



In the vicinity of El Paso, where the greatest variety of conditions 

 was encountered, the species was found on the greasewood-covered 

 mesa, the rugged slopes of the Franklin Mountains, the broken area 

 at the foot of the mesa and on bare spots in the irrigated region along 

 the Rio Grande. At Deming the mesquite and rabbit-weed plain 

 harbored this species, while in the Florida Mountains it occurred on 

 the rugged lower slopes. At Cloudcroft it was found uncommon in 

 meadow land and along the edge of the conifer forest, while at Alamo- 

 gordo it was found in the greasewood area east of the town and 

 around arc lights at night. Cultivated ground was frequented at 

 Albuquerque and rugged hillsides at Silver City, while all situations 

 yielded it at Aden. 



The majority of the El Paso specimens are slightly more grayish 

 than the others in the series examined, the contrast of the tegminal 

 bars being more decided, although this latter feature is so variable as 

 to be worth nothing more than passing notice. 

 Trimerotropis cyaneipennis Brunei-. 



On the very steep rocky slopes of the Florida Mountains this species 

 occurred sparingly, two specimens, a male and female, being taken. 

 It haunted the same jumble of boulders and precipitous exposures as 

 Mestobregma plattei and was equally wary and vigorous. The male 



