78 



Scott; Aquatic Coliembola 



— Exserted filaments of ventral tube warty 3 



2. Anal segments fused, with 2 sensory- setae on each 

 side; fourth antennal segment simple or subsegmented 

 Smynthurides Borner 1900 



— Anal segments separate, with 1 sensory seta on each 



side; fourth antennal segment not subdivided 



Smynthurinus Borner 1901 



3. Antennae bent between segments 3 and 4, fourth longer 

 than third, third segment undivided; furca without dorsal 

 sensory papillae 4 



— Antennae bent between segments 2 and 3, fourth shorter 

 than the third; third and fourth segments sometimes 

 subdivided; furca with dorsal papillae 5 



4. Two or 3 clavate tenent hairs on each tibiotarsus . . . 

 Bourletiella Banks 1899 



— Tibiotarsus without multiple tenent hairs, if present 

 then 1 only and prominent . . . Smynthurus Latreille 1804 



5. Third and fourth antennal segments not markedly sub- 

 divided Dicyrtoma Bourlet 1843 



— Third antennal segment and usually the fourth distinctly 

 subdivided Ptenothrix Borner 1906 



pools. ... malmgreni f. palustris Folsom and Mills 1938 



Genus Smynthurinus Borner 1901 



1. Tenent hairs on tibiotarsi usually 2; stagnant water . 

 remotus Folsom 1896 



— Tenent hairs on tibiotarsi 3-8 (fig. 2:3/) 2 



2. Both edges of mucrones serrate; unguis with 3 inner 



teeth; cosmopolitan, stagnant water, rain pools 



: quadrimaculatus (Ryder) 1879 



— Mucrones with outer edge entire, inner edge serrate; 

 unguis usually untoothed (fig. 2:3/) 3 



3. Tenent hairs 4-8 on tibiotarsi (fig. 2:3/); color orange 

 with black eye spots; cosmopolitan, stagnant water, 

 fish ponds aureus (Lubbock) 1862 



— Tenent hairs 3 or 4 on tibiotarsi; color pale yellow or 

 green with black lateral stripes; cosmopolitan, stagnant 

 water elegans (Fitch) 1863 



Genus Bourletiella Banks 1899 



Genus Smynthurides Borner 1900 



Tibiotarsal organ present on third pair of legs composed 



of 2 sacs and enlarged spine 2 



Tibiotarsal organ absent on third pair of legs; fish 



ponds sexpinnatus Denis 1931 



Mucrones half as long as broad; (fig. 2:4a) dorsal seg- 

 mentation of abdomen clearly evident; cosmopolitan, 



quiet streams, salt ponds 



aquaticus f. levanderi (Reuter) 1891 



Mucrones one-third as long as broad; dorsal segmenta- 

 tion of abdomen indistinct; cosmopolitan, freshwater 



Only a single species, B. hortensis (Fitch) 1863, is 

 found in California. It is a cosmopolitan species 

 found on stagnant water and on rain pools. 



Genus Ptenothrix Borner 1906 



A single species, P. maculosa (Schbtt) 1891 (fig. 

 2-Ab) is recorded from California and is found on rain 

 pools and stagnant water. 



antennal 

 sense organ 



post antennal organ 



cuticular tubercles 

 of body 



REFERENCES 



BACON, G. 



1914. Distribution of Coliembola in the Claremont- 

 Laguna region of California. Pomona Coll. Jour. Ent. 

 Zool., 6:137-184, 5 figs. 

 DAVENPORT, C. B. 



1903. Coliembola of Cold Spring Beach. Brooklyn Insti- 

 tute of Arts and Sciences. Cold Spr. Harb. Monog. II, 

 33 pp. 

 FOLSOM, J. W. 



1934. Redescriptions of North America Smynthuridae. 

 Iowa St. Coll. Jour. Sci., 8:461-511. figs. 



1938. Contributions to the knowledge of the genus Smyn- 

 thurides. Bull. Mus. Comp. Zool., 82:229-274. 



LABOULBENE, A. 



1864. Recherces sur VAnurida maritima, insecte Thy- 

 sanura de la famille des Podurides. Ann. Soc. Ent. 

 Fr., 4:705-720. figs. 

 MAYNARD, E. A. 



1951. Monograph of the Coliembola or Springtail Insects 

 of New York State. Ithaca," N.Y.: Comstock Publ. Co. 

 xxiv-339 pp. 

 MILLS, H. B. 



1934. Coliembola of Iowa. Ames, Iowa: Collegiate Press. 

 143 pp. 

 SCHOTT, HARALD 



1896. North American Apterygogenae. Proc. Calif. Acad. 

 Sci., 6:169-196. 

 SCOTT, D. B., JR. 



1942. Coliembola Records for the Pacific Coast. Pan-Pac. 

 Ent., 18:177-186. 

 WOMERSLEY, H. 



1939. Primitive Insects of South Australia. Govt. Publ., 

 Adelaide, pp. 79-278. figs. 



anal spine 



Fig. 2:5. Achorufes armafus Nicolet and important 

 anatomical features (Essig, 1942), 



