PHRYGANEIDE. 
the thorns on the first and second cox are much more minute— 
invisible except in prepared mounts under the compound micro- 
PHRYGANEA VESTITA. 
38. Larva. Head and thorax. 43. Larva. Frons. 
39. Larva. Labrum. 44. Larva. Front leg. 
40. Case of young larva. 45. Larva. Middle leg. 
41. Case of old larva. 46. Larva. Hind leg. 
42. Larva. Distribution of gills. 
37 
