1913] 
Burrill, The Giant Midge, Chironomus plumosus. 
157 
88 per cu, meter, while in 1898, in more disturbed conditions, 
there were 29 occurrences in 52 collections, averaging- 124 
per cu. meter. There is also a marked seasonal distribu¬ 
tion. The larvae appear in the plankton in Mar.—December 
through the seasonal extremes of temperature, but the num¬ 
bers in March and Nov.—Dec. are always small. Only 15% 
of the occurrences and 5% of the individuals were found at 
temperatures below 45°. The percentage of occurrences in 
the collections is highest in March—Sept., the percentages 
being 53, 73, 80, 47, 78, 52, and 50, respectively, to 8 to 35% 
during the remaining months.” 
Korschelt, E. 
1884. (Dec. 21, 1883) Ueber die eigenthiimlichen Bildungen in den 
Zellkernen der Speicheldriisen von Chironomus plumosus. 
Zool. Anz. Bd. 7, No. 164 (Apr. 7), pp. 189-194; No. 165 
(Apr. 21), pp. 221-5; No. 166 (May 5), pp. 241-6. 
Kow. 
*1894. Cat. Ins. faun. Bohem. v. 2, Diptera, p. 1. Notes sp. 
Kupffer, C. 
1866. Ueber das Faltenblatt an den Embroyonen der Gattung 
Chironomus. Archiv. f. mikrosk. Anatomie. Bd. 2, pp. 385-398, 
pi. XX,unident. sp. collected in botanical garden at Dorpat. 
*1867. De embryogenesi apud Chironomus Observations, etc. Diss. 
in ang. Kiliae, pp. 16, pi. 1. 
Latreille, P. A. 
*1805. Hist. Nat. d. Crust, et d. Ins. T. XIV, p. 289, 1 notes sp. as 
C. annularis. 
*1809. Gen. Crust, et Ins. v. IV, p. 249. Notes sp. 
Levi-Moneros. 
*1891. Neptunia, v. 1, p. 7. Notes sp. 
Linne, C. von. 
1758. Syst. Nat. ed. X, p. 587, 19, notes sp. as Tipula plumosa of 
Europe; “T. thorace virescente, alis hyalinis puncto nigro. 
Fu. Swec. It. celand 40, 41, 86, 160. Goed. (belg.) ins. 
3 (p. 35) t. or pi.) x. List. g(or G)oed. p. 336 per Goef- 
froy) f. 140. Eeaum. ins. 5. t. 5. f. 10. Habitat in Europa, 
imprimis in maritimis.” In () are addenda to citations 
from GoefEroy, 1762. 
*1761. Fauna Suec. ed. II, p. 434, 1758 notes sp. as Tipula plumosa. 
*1767. Syst. Nat. ed. XII, v. 2, p. 974, 26 notes sp. as Tip. plumosa. 
Lintner, J. A. 
1882. (Jan. 12) First Annual Beport on the Injurious and Other 
