LIMNOPHILID&E. 
GLYPHOTALIUS HOSTILIS. 
Hasrrat.—Full-grown larve were not uncommon during the 
fall of 1919 in the cove and pools about the Field Station. During 
previous summers a few larve were taken in the same locality, but 
GLYPHOTAELIUS HOSTILIS. 
47. Larva. Head and thorax. 49. Larva. Frons. 
48. Larva. Distribution of gills. 50. Case of larva. 
never in sufficient quantities to work out the life history of the 
species. In the summer of 1919 the larve were found in great 
numbers in the ditches of the Swamp at North Spencer. Hitherto 
the species has never been recorded from New York State. 
Hapits.—The larve were found climbing on submerged vege- 
tation and crawling over the bottom, together with Phrygane ves- 
tita and P. interrupta. Nothing is known of the larve during the 
first instars. 
Periop oF EMERGING.—A single specimen emerged in the 
laboratory on April 5. 
DeEscRIPTION OF Larva.—Length. 30—35 mm.; breadth, 5 
mm. In life the soft parts are green and the chitinous parts are 
pale-yellow and dark-brown or black. 
The Head—A black band commences at the base of each 
mandible, and, touching the upper margin of the eye, curved inward 
43 
