246 long's second expedition. 



pond with those of Asindulum punctatum Latr., excepting that 

 the second nervure is not at all connected with the first nervure, 

 but curves downward at tip and enters the intermediate cellule 

 before the middle, and the ultimate and penultimate abbreviated 

 nervures are distinct ; it is a much smaller species than the fasciata 

 nob., the nervures of which agree better with the preceding spe- 

 cies, but its connecting nervure from the second nervure enters 

 the intermediate cellule at the middle. 



3. S. hirticollis. — Yellowish-white; thorax hairy; tergum 

 black, with pale yellowish bands. 



Inhabits North-west Territory. 



Head black ; hypostoma, mouth and tropin whitish ; antennas 

 black-brown, the four basal joints yellow, with a dark brown spot 

 above on the third and fourth ; thorax with rather numerous, 

 somewhat long, black hairs ; three dilated, brownish-livid lines, 

 the intermediate one abbreviated and attenuated behind, and the 

 lateral ones attenuated before ; wings a little dusky, the inter- 

 mediate cellule appearing to the eye like a small, black spot ; 

 poisers whitish ; pleura with a brownish-livid spot over the in- 

 termediate and posterior feet; feet dusky towards the tip, the 

 coxas [363] with strong, black hairs on the exterior side and tip ; 

 tergum 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 ner- 

 vure 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 central, furcate nervure, by a nervure as 

 perfectly transverse as that of S. vitripennis Meig. 



4. S. bifasctata. — Dark yellowish ; wings bifasciate. 

 Inhabits North-west Territory. 



Head black; antennae fuscous; hypostoma yellow, near the 

 antennae blackish ; palpi whitish at base, dusky towards the tip ; 

 thorax honey-yellow; two oblique, black lines confluent behind, 

 and not reaching the posterior margin ; a black line above each 

 wing, joining on the posterior margin and meeting the oblique 

 lines at the anterior angles; wings hyaline with two blackish 



