1901.] NATURAL SCIENCES OF riULADELPllIA. 5G*J 



Drassodes robustus, Piecilochroa montamt, Gnaphosa cunspersa, 

 Titanceca americana, Grammonota pictilis, Telracjnatha extensa, 

 JEpeira aculeata, Xysticus mo)itane)isis, Lycosa modeda, Pardosa 

 gladalis, Icius simllii, llahroeestum oregonense and Phalangium 

 cinereum. These species ally the fauna very strongly to that of 

 Colorado. 



The Southern element coutaius several species not previously 

 known from north of the Mexican boundary. The most charac- 

 teristic of these species are Physocydus globosus, Gnaphosa distinda, 

 Sysjnra sp., Dictyiia texana, Epeira nepkiloides, Epeira oaxensis, 

 Ebo mexicana, Olios fasdculatus, Phidippus bicolor, Sadala distinda, 

 Ammotrecha peninsxdana and Lit hyp hantes fulvKS. There does not 

 appear to be any particular connection between this fauna and that 

 of Arizona, although, of course, there are a number of foi'ms com- 

 mon to both. These forms are such as are rather widely distributed 

 in the West. Of the six harvest-men, one is a northeastern form, 

 one a northwestern one, two are typical Colorado species, and two 

 are known chiefly from New IMexico. Of the three Pseudoscorpions, 

 one is a typical Colorado species and two are Cahfornia forms. 



The collection, as a whole, contains few bright-colored species, 

 and none are of very large size. In fact, many of the specimens 

 are smaller than those from more noi'therly regions. 



Mr. Cockerell gives the following notes on localities : 



(1) The Mesilla Valley, about 3,800 feet, includes Mesilla 

 Park and Mesilla (collections by Cockerell) and Las Cruces 

 (collections by Townsend; a few specimens by Cockerell). These 

 places are all close together, and are in the Middle Sonorau zone. 



(2) Organ Mountains; collections at La Cueva and Fillmore 

 Caiion by Townsend, and at Dripping Spring by Cockerell, These 

 mountains may be considered LTpper Sonoran ; they form the 

 eastern boundary of the Mesilla Valley. 



(3) White Mountains; collections by Townsend. This includes 

 the localities cited as Ruidoso creek and Eagle creek. The moun- 

 tains form an isolated range of considerable altitude, and possess 

 some endemic mollusca, at least. 



(4) Albuquerque; collections by Soltau. This is Upper Son- 

 oran. 



(5) Las Vegas; collections by Cockerell. This has an altitude 

 of about 6,400 feet, and is Upper Sonoran, tinged with Transi- 



