152 PROCEEDINGS OF THE ACADEMY OF [Feb. 



of the disk of the pronotum varies from acute to obtuse-angulate, 

 though by far the greater majority of the specimens have it rectangu- 

 late. 



Previously known only from El Paso, Texas; Mesilla, Mesilla Park 

 and the region about Las Graces, New Mexico, this species is now known 

 to range north in the Otero basin to at least as far as Alamogordo and 

 west at least to Deming. 



Trimerotropis fascicula McNeill. 



A pair of this species was taken at Albuquerque, September 14, 

 while a single male was secured on the greasewood-covered mesa north- 

 east of El Paso, July 10. The Albuquerque individuals were taken 

 on dry ground near the river bottom. The tegminal bars are well 

 defined in all three specimens. 

 Trimerotropis modesta Brunei-. 



A single freshly transformed female taken on the edge of the mesa 

 near El Paso, July 11, is referred tentatively to this species. On 

 account of its condition the wing membranes are quite delicate and 

 the coloration very weak, but it appears to represent this species, 

 although considerably larger than the original measurements and the 

 specimens available for comparison. 



Length of body, 30.5 mm. 



Length of pronotum, 7 " 



Length of tegmen, 34 " 



Length of caudal femur, 17 " 



Trimerotropis laticincta Saussure. 



Of this rather striking species a single female was taken, July 11, at 

 El Paso, and two males and one female at Deming, July 18. The 

 El Paso individual was collected on the rough slopes at the foot of 

 the mesa, while the Deming specimens were taken in the yucca-dotted 

 sand waste along the dry bed of the Mimbres. 



The wing-band in these specimens varies from a third to slightly 

 more than a third the length of the wing. The ulnar spur is very 

 short and sometimes hardly evident. The species is exceedingly 

 vigorous and wary. 

 Trimerotropis rubripes Rehn. 



This interesting species, previously known only from the unique 

 type from Albuquerque, is now known to range southward along the 

 Rio Grande Valley to El Paso and also eastward and westward over 

 a good portion of the Eastern or Chihuahuan Desert tract. Near El 

 Paso the species was found sparingly on bare patches among low weeds 



