Springtails (Collembola) of the St. Louis Area 17 
the length of the head, last two segments obscurely annulate, 
third segment about one-half the second and with a dark apical 
ring, first segment about one-fourth the second; furcula ex- 
tending to the ventral tube; ventral tube about as long as the 
dentes; mucro with apical and subapical teeth and a proximal 
spine; tenent hair present; many short curving setae covering 
the body. 
This species is commonly found under logs or dead leaves 
or in humus in the woods. This species may easily be identified 
by means of the markings over the body and the dark apical 
ring of the third antennal segment. This species also occurs 
in Europe and is common in the United States, and Canada. 
It is cosmopolitan. Records: March 25, 1934, Ranken, Missouri, 
(E. P. Meiners). 
GENUS Pseudosinella Schaffer, 1897 
_ Eyes absent or reduced. Pigment usually lacking. Mucro as 
in Entomobrya, Tenent hair weakly developed. Body scaled. 
Pseudosinella violenta (Folsom), 1924 
Figures 14-17; length 1.5-2 mm.; entire body white; no eye- 
Spots and no eyes; covered with some scales that are rounded; 
body segments visible but not distinct; antennae 4-segmented, 
Segments to each other as 1, 1.8, 1.6, 2.8; dorsal side of fourth 
abdominal segment three times the length of the dorsal side of 
the third; furcula reaching to the ventral tube; tenent hair some- 
what capitate; dentes dorsally crenulate and with setae, ventrally 
with scales; mucro slender, with one apical and one subapical 
tooth, both teeth directed dorsally. 
This species js frequently found in manure during the sum- 
mer months and seems to tolerate more temperature ranges than 
Most species of Collembola. Dr. Harlow B. Mills states that 
