1873.] Bilik [Hagen. 
7. Cordulia Shurtlefii. Type male is identical with C. bi- 
furcata Uae. Syn., 127, 4 (not described). 
8. Cordulia Walshii. Type male; Epitheca Walshu in De 
Selys’ monograph. A very interesting new species; the female still 
unknown. 
9. Cordulia elongata. Type male and female. Epitheca elon- 
gata of De Selys is identical with C. saturata Hag. Syn., 138, 12 (not 
described). 
10. Diplax rubicundula. My specimens agree entirely with 
Mr. Scudder’s elaborate description of this species. I did not see the 
types from the White Mountains. 
Perhaps the synonymy of the species of Cordulia mentioned only 
by name in my Synopsis, p. 137, 148, may not be out of place here, 
as the species are now fully described. 
C. bifurcata is C. Shuritleffiit De Selys Syn., p. 31. 
C. libera is C. libera De Selys, p. 29. 
C. procera is E’pitheca procera De Selys, pa2oe 
C. chalybea is Epitheca forcipata De Selys, p. 61. 
C. Franklini is Epitheca septentrionalis of my Synopsis and of De 
Selys p. 64. 
C. Richardsoni beiongs to the foregoing species. 
C. cingulata is Epitheca cingulata De Selys, p. 68. 
C. tenebrica is Epitheca tenebrosa Say, De Selys, p. 55. 
C. saturata is E/pitheca elongata of De Selys, p. 58. 
Mr. Emerton exhibited under the microscope the young lar- 
vee of a water beetle, Onemidotus muticus. The eggs were laid 
in confinement on the roots of duck-weed. He also showed a 
species of Tortricid (Penthina?) which he had raised from 
a larva found in Brookline, Mass., on pines. The larva in- 
habits a case made of eight or ten needles joined together 
parallel to each other and forming a tube. 
Dr. Hagen said that Dr. Packard had pointed out to him 
that the crustaceous genus Prosopistoma was founded by 
Latreille on the larva of a Beetisca, first described by Geof- 
froy in his Histoire Naturelle des Insects, and on similar lar- 
ve from Madagascar. Walsh (Proc. Entom. Soc., Philadel- 
phia, 11., 200) has described the pupa of a Betisca and suc- 
