146 AMERICAN COLEOPTERA. 



been enougli work done to even establish a strong probability that 

 any given form, known only from a particular range, is restricted to 

 it. An analysis of the distribution of the new species described in 

 the present paper shows that they come from many localities; but it 

 is perhaps significant that so many (14) are exclusively from the 

 Sacramento Mountains. It may be added, that from the results 

 obtained in the close study of plants, molluscs, etc., we may expect 

 that in many instances the insects of different groups of mountains 

 will differ only in slight characters — being in the early stages of 

 modification from the original more widespread types. This com 

 paratively slight divergence will uot usually be thought worth 

 recording in nomenclature, according to prevalent methods, and will 

 only be fully revealed by biometrical and kindred studies. 



It will be convenient to enumerate the principal localities for 

 Coleoptera in New Mexico in groups, according to the regions and 

 types of country they repre.sent. 



Eastern Region (east of the Rio Grande). 



(1) Raton district (Colfax County) : Raton, Barela Mesa, Chicorico 

 Canon. This is just south of the Colorado line. 



(2) Trementina district, east of Las Vegas, on the headwaters of 

 the Canadian River. Collector, Miss Alice Blake. 



(3) Santa Rosa district (Leonard Wood County): collector W. 

 Knaus. In this general region also is Las Truchas (collector 

 Miss Clara Gerhardt), which must not be confused with the 

 Truchas Peaks. 



(4) Roswell district (Chaves County), on the Pecos River; including 

 Diramitt Lake and Las Lake. This marks approximately the 

 beginning of the Middle Sonoran in the Pecos Valley. 



(5) Carlsbad district (Eddy County), on the Pecos, about 65 miles 

 south of Roswell. Eddy is the former name of Carlsbad. 



The collections frou) all of the above five districts are small, and 

 the most eastern parts of New Mexico, within 50 miles of the Texas 

 line, are unexplored for beetles. 



(6) Sierra Blanca and Sacramento Mountain district, in Otero and 

 Lincoln (bounties. Includes Eagle Creek, Rio Ruidoso (or Rui- 

 doso Creek), Mescalero, Fresnal Creek, Cloudcroft, Wootens 

 and Highrolls. This is an extensive and isolated mountain 

 region, possessing some remarkable endemic snails, and proba- 



