Springtails (Collembdola) of the St. Louis Area 15 
Entomobrya quadrilineata N. Spx< 
~ Figures 44:47: length 2-2.5 mm. ; light yellow with four black 
or bluish irregular longitudinal stripes, two on each side extend- 
ing from the anterior margin of the mesothorax to the posterior 
margin of the second abdominal segment; segments three, four 
and five each with an irregular transverse stripe on the posterior 
third of the segment and an additional stripe across the middle 
of the fourth; dorsal side of fourth segment about four to five 
times the ‘third: long tenent hair present on the dorsal anterior 
half of the body, much less abundant elsewhere; antennae 2 to 
3 times thé: length of the head, segments to each other as 1, 1.6, 
1.6, 2; dark band extending from one eyespot and antennal base 
to the other eyespot and antennal base; furcula extending to the 
ventral tube, dentes dorsally crenulate and covered with many 
small setae, mucro with apical and subapical tooth; some speci- 
mens with-a clear area in one corner of each eyespot at the an- 
terior edge nearest the antennae, this clear: area containing from 
fifteen to twenty-six round black spots. 
e 
‘This species greatly resembles E, multifasciata but differs 
greatly in the markings. The four black irregular stripes, two 
on each side on the anterior part of the body as described, are 
not found on E. multifasciata. Instead, E multifasciata has 
transverse bands on these anterior segments. This species is 
commonly found in humus. and protected top soil. Records: 
March 25, 1934, Ranken, Missouri, (he. Meiners) ; August 8, 
1937, Chautauqua, Illinois, (E. D. Bueker). 
GENUS Orchesella Templeton, 1835 
Eyes, eight on each side. Antennae are six segmented, first 
two segments often obscure. The fourth abdominal hah 
never more than twice the third. 
