Neanura Gigantea Tull in Southern 

 California 



GERTRUDE BACON 



This species of Collembola has been reported from St. Paul 

 Island in the Bering Sea, Siberia, and in the vicinity of St. 

 Laurence Bay. It is therefore interesting that a number of 

 specimens of this species were collected from five places near 

 Claremont, California. About twenty specimens were first 

 obtained in a rotten piece of wood in Cucamonga canyon during 

 the month of November, 1913. Since then one specimen was 

 obtained from Fern canyon, a number from Palmer's canyon, 

 and several were found among the rocks in the hills south of 

 Pomona and also in the hills south of Chino. They have been 

 searched for in other places, including the hills near Laguna 

 but without success. The specimens obtained seemed to be the 

 same as those described by Prof. J. W. Folsom in one of his 

 papers from the Harriman Alaska Expedition, except that they 

 have one more tubercle on the anterior part of the head. Those 

 described by Folsom have only one tubercle between the eyes, 

 while my specimens have two. (Fig. 1.) 



Length 3-5 mm. Width 1.5-2.5 mm. Color^Dark blue, 

 lis'hter on the ventral side. Body — Broad, flat, covered with 

 lara-e dark tubercles, the numbers on each successive segment 

 being 6, 8, 8, 8, 8, 8, 8, 6, 2. Each tubercle bears several long 

 hairs. Head — A little longer than the first two segments, 

 triangular in shape, divided into two parts, a raised upper 

 portion with five small tubercles and two large tubercles 

 containing the eyes, and a lower portion with six large 

 tubercles. Antenna? (Fig. 2 A) — Short, not as long as head, 

 on the dorsal side it is hard to distinguish more than three 

 segments, but four show plainly on the ventral side; basal 

 segment is round, the terminal one is as long as the other 

 three together; no sense bulbs. Ocelli (Fig. 2 B) — Five in each 

 eye spot, situated on a tubercle with three large hairs. Post- 

 antennal organ (Fig. 2 C) — Present, circular, composed of over 



