No. 624] BEACTIONS OF PIIRYNOSOMA 



35 



although it also is of wide distribution. This species is 

 found throughout Texas and eastern and southern New 

 Mexico, and has been reported from Nebraska, Arkansas, 

 etc. In general, it appears to inhabit regions in which 

 the mean summer temperature is slightly higher than that 









l^i and 





V V . varieties 

















required by the other two species. The specimens here 

 considered were obtained at Alamogordo, in the Otero 

 Basin, New Mexico, where the mean temperature is higher 

 by about 5° C. than at Albuquerque. 



2. General Habits. — The general habits of the three 

 species here considered are much the same, so no sepa- 

 rate description will be attempted. The following dis- 

 cussion will apply, perhaps, more accurately to Phnjno- 

 soma modestum than to either of the other species, but 

 will, in general, be true of all. They are not, essentially, 

 heat-loving animals, although tolerant of desert condi- 



