LUCY WRIGHT SMITH 
489 
Fig. 43. — Megarcys signata Hagen. End of abdomen of adult cf in dorsal 
view. 
Fig. 44. — Megarcys signata Hagen. End of abdomen of adult 9 in ventral 
view. 
Plate XXXIII 
Fig. 45. — Megarcys signata Hagen. Entire supra-anal plate of adult cf in left 
lateral view. 
Fig. 46. — Megarcys signata Hagen. Diagram to show arrangement of gills. 
Fig. 47. — Megarcys signata Hagen. End of abdomen of nymph in left lateral 
view. 
Fig. 48. — Arcynopteryx lineata new species. End of abdomen of adult 9 in 
ventral view. 
Fig. 49. — Arcynopteryx aurea new species. End of abdomen of adult 9 in 
ventral view. 
Fig. 50. — Arcynopteryx vagans new species. Entire supra-anal plate of adult 
cf in left lateral view. 
Fig. 51. — Arcynopteryx vagans new species. End of abdomen of adult cf in 
dorsal view. 
Fig. 52. — Arcynopteryx ignota new species. End of abdomen of adult 9 in 
ventral view. 
Fig. 53. — Arcynopteryx inornata new species. End of abdomen of adult 9 in 
ventral \dew. 
Fig. 54. — Arcynopteryx americana Klapdlek. End of abdomen of cf in dorsal 
view. After Klapdlek. 
Fig. 55. — Arcynopteryx americana IHap^lek. End of abdomen of adult 9 in 
ventral view. 
Fig. 56. — Dictyogenus? phaleratus Needham, new species. End of abdomen 
of adult 9 in ventral view. 
Fig. 57. — Arcynopteryx nymph “b”. End of abdomen in left lateral view. 
Plate XXXIV 
Fig. 58. — Pteronarcella regidaris Hagen. cT Adult wings. Length of fore- 
wing, 18 mm. 
Fig. 59. — Protarcys dolobrata new species. 9 Adult wings. Length of fore- 
wing, 21 mm. 
Fig. 60. — Protarcys bradleyi new species, cf Adult wings. Length of fore- 
wing, 15 mm. 
Fig. 61. — Megarcys signata Hagen. 9 Adult wings. Length of fore-wing, 
18 mm. 
Fig. 62. — Arcynopteryx inornata new species. 9 Adult wings. Length of 
fore-wing, 13 mm. 
Fig. 63. — Arcynopteryx vagans new species, cf Adult wings. Length of fore- 
wings, 12 mm. 
Fig. 64. — Arcynopteryx aurea new species. 9 Adult wings. Length of fore- 
wing, 16 mm. 
Fig. 65. — Dictyogenus? phaleratus Needham, new species. 9 Adult wings. 
Length of fore-wing, 15 mm. 
TRANS. AM. ENT. SOC., XLIII. 
