142 JOUENAL OF ENTOMOLOGY AND ZOOLOGY 



States and we share it with England. I also found two new 

 species of Tullhergia here and two of Drepanura, and it is the 

 first time these genera have been recorded from the United 

 States. 



In regard to local distribution, the forms found most widely 

 were Isotoma viridis, Entomohrya multifasciata, Neanura 

 gigantea, Entomohrya hinoculata and a new species of Isotoma. 

 These all were very abundant and found in nearly all the 

 localities from which Dr. Hilton or I have collected. 



Tliere was not a marked difference between the Collembola 

 found in the different canyons. San Dimas and Palmer's 

 canyons had the greatest number of ditTerent forms, due no 

 doubt to the great abundance of vegetation in those canyons. 

 The Drepanura were confined entirely to the high altitudes, 

 being found only on the slopes of Mt. San Antonio at 6000 

 and 7000 feet. Three species of Aphorura, Isotoma palustris, 

 Tomocerus vulgaris and Entomohrya were also found only in 

 the mountains. 



The two species of Tullhergia were the only forms found 

 exclusively in the hills. The forms found entirely in the 

 valley were Cyphodeirus alhinus, Sinella curviseta, Entomohrya 

 clitellaria, Isotoma minima, and a member of the genus 

 Achorutes. 



The forms that were peculiar to Lagaana Beach were Isotoma 

 besselsii, Isotoma bidenticnla, and Entomohrya lagiiua. These 

 were found as far out in the ocean as one was able to turn over 

 the I'ocks at low tide. This is the first time that the genus 

 Entomobrya has been reported from under rocks in salt water. 



With the exception of Schott, who has described some thirty 

 species, mostly from the northern part of the state, no work 

 has been done in California. This region around Claremont 

 has not been touched at all and as is to be expected several 

 species were found that had never been described before. Many 

 interesting points were also gained on the subject of distribu- 

 tion. As yet I have by no means exhausted the field and I 

 hope some lime 1o be al)le to continue the study of this region. 



