FALL AND COCKERELL. 147 



bly endemic plants. It is mainly in the Transition Zone, but 

 has large patches of Canadian (cf. Bailey, North American 

 Fauna, No. 25). The Guadalupe range, of which the Coleop- 

 tera are unknown, may be regarded as a southern extension of it. 

 The Manzano and Sandia ranges (their Coleoptera unknown) 

 are between it and the Las Vegas-Santa Fe Mountains, but are 

 cut off from both by arid lowlands. 



(7) Alaraogordo-Tularosa district, including La Luz and Alamo 

 Canon, all in Otero County. This is the Middle Sonoran area 

 near the western base of the Sacrameutos. 



(8) Organ Mountain district, including Organ, Parker's Well, Fill- 

 more Canon, Soledad Canon, Riley's Ranch = La Cueva, Drip- 

 ping Springs and San Augustine Ranch. A range of sharp 

 peaks running north and south, to the east of Las Cruces, in 

 Doha Ana County. In general, it may be referred to the Upper 

 Austral (Upper Sonoran) Zone. The San Andreas Mountains 

 are practically continuous with the Organs to the north. 



(9) Mesilla Valley distinct, in Dona Ana County, Middle Sonoran 

 Zone. This includes areas on both sides of the Rio Grande, but 

 the Coleoptera all come from the east side. Las Cruces, Mesilla 

 Park and Mesilla are in this district, only a few miles apart. 



(10) Rincon district, in Dona Ana County, on the Rio Grande ; 

 Middle Sonoran. Here come also Hatch and Colora'o, just 

 across the river. 



(11) Engle district. Sierra County, about 36 miles north of Rincon. 

 Collector Miss Nora Newberry. 



(12) Albuquerque district, in Bernalillo County. Here, passing up 

 the Rio Grande, we reach the Upper Sonoran, though some 

 Middle Sonoran elements still persist. Elba is on the Santa 

 Fe Railroad a little west of Albuquerque. 



(13) Santa Fe district; Transition Zone, including Tesuque (or 

 Tsuque). Santa Fe Canons runs up into the Canadian Zone. 



(14) Pecos district, in San Miguel and Santa Fe Counties, on the 

 upper Pecos River. This includes Glorieta, the Old Pecos 

 Pueblo and Rowe. It may also be considered to include Man- 

 zanares. It is Upper Sonoran, but bordering on Transition. 



(15) Thornton district, in Sandoval County, between Albuquerque 

 and Santa Fe. Collector Dr. Fenyes. 



TKA.NS. AM. ENT. SOC. XXXIII. MAY, 1907. 



