APPENDIX. 363 



with strong, black hairs on the exterior side and tip ; ter- 

 gwin black, with black, rather long hairs ; segments with 

 broad, yellowish hind margins; tip black. 



Length of the body three-twentieths of an inch. 



The wing nervures resemble those of S. littoralis, nob., 

 but the abbreviated nervures are very strongly marked ; 

 the second nervure is connected with the first, and by a 

 transverse nervure with the intermediate cellule opposite 

 to the middle ; the cellule is also connected with the cen- 

 tral, furcate nervure, by a nervure as perfectly transverse 

 as that of S. vitripennis, Meig. 



4. S. hifasciata. Dark yellowish ; wings bifasciate. 

 Inhabits North-west Territory. 



Head black ; antennse fuscous j hypostoma yellow, near 

 the antennas blackish ; palpi whitish at base, dusky to- 

 Avards the tip ; thorax honey-yellow ; two oblique, black 

 lines confluent behind, and not reaching the posterior mar- 

 gin ; a black line above each wing, joining on the posterior 

 margin and meeting the oblique lines at the anterior an- 

 gles; wings hyaline, with two blackish bands more obvi- 

 ous at the costal margin, one of which is near the middle 

 widely interrupted on the disk, and the other near the tip ; 

 metathorax black ; feet white-yellow at base, dusky to- 

 wards the tip. 



Length to tip of the wings nearly two-fifths of an inch. 



A large and handsome species. The wing nervures 

 agree with those of Asindulum punctatum, Latr. except- 

 ing that the second nervure is continued a short distance 

 beyond its transverse nervure, which latter enters the in- 

 termediate cellule at the basal angle. 



5. S. obliqua. Pale yellowish ; thorax four-lined j tcr- 

 gum fasciate with black. 



Inhabits North-west Territory. 



