EPflEMERIDiE, ODONATA, lus. 265 
Thalerosphyrus^ id. ibid. Allied to Heptagenia ; type, Bcetis determin- 
atus, Walker. 
Pcegniodes, id. 1. c. p. 23. Allied to Heptagenia ; type, H. cupidatus, 
Eaton. 
Compsoneuria^ id. ibid. Allied to Heptagenia ; type, C. spectabilis, sp. n., 
ibid.^ Lahat. 
Rhithrogena, id. ibid. Allied to Heptagenia ; type, Bcetis semicolorata^ 
Curt. 
Epeorus, id. 1. c., p. 2G. Allied to Heptagenia ; type, E. torrentium, 
ap. n., ibid.., South France. 
Odonata. 
Bergroth, E. Zur geographischen Verbreitung einiger Odonaten. 
Ent. Nachr. vii. pp. 85-88. 
Interesting notes on the species occurring in Finland, especially with 
regard to their northern distribution. 
Cabot, Louis. The immature state of the Odonata. Part ii.. Subfamily 
uEschnina [which see]. Mem. Mus. C. Z. viii., No, 1, pp. 1-40, 
pis. i.-v. 
Eimer, — , Eine Dipteren und Libellenwanderung beobachtet im Sep- 
tember, 1880. Biol. Oentralbl. i. pp. 549-657. 
Contains a reference to a swarm of Diplax scotica as seen in the Enga- 
dine, with extracts from a letter from Kdunzinger respecting an .Mschna 
in Egypt. 
Kemp-Welch, E. B. Chapters on British Dragon flies. Sci. Goss. xvii. 
pp. 35-38, 54, 55, 78 & 79. 
A popular paper, based upon Hagen’s synopsis in Ent. Ann. 1857, 
with rough woodcuts. 
Kolbe, H. Uber den Zweck der Appendices anales und der entsprechen- 
den vicariierenden Organe am Hinterleibsende der Libelluliden. 
JB. westf. Yer. 1881, pp. 52-56. 
An attempt to correlate the form of the anal appendages of the $ 
with that of the margin of the pronotum in the $ , in connection with 
the position of the sexes during the copulative act. 
. Weitere Beitrage zur Kenntniss der Odonaten-fauna Westfalens. 
L. c. pp. 56-58. 
3 species (Leucorrhinia rubicunda, Ophiogomphus serpentinus, and Agrion 
armatuni) added to the fauna, which now includes 47. Special and 
general geographical notes on other species are also given. 
Lendenfeld, R. V. Ein Beitrag zur Anatomie und Physiologie der 
Flugorgaue der Insecten. SB. Ak. Wien, Ixxxiii. pp. 289-376, 
pis. i.-vii. 
A most elaborate treatise, of which it is impossible to give a short 
abstract ; it is worked out from both the anatomical and physical aspects 
of the movement, with copious figures, diagrams, and mathematical demon- 
strations. The subject is also treated upon in comparison with the 
1881. [vOL. XVIII.] C 3 
