APPENDIX. 365 



MYCETOPHILA, Meig. 



1. yi. sericea. Head and thorax sericeous; the latter 

 dusky, margined with yellowish. 



Inhabits North-west Territory. 



Head blackish, with a yellowish, sericeous gloss ; an- 

 tennse fuscous, two basal joints and paljn 3'^ellowish ; tho- 

 rax sericeous, blackish on the disk, dull yellowish each 

 side and on the anterior edge ; wings immaculate, nervures 

 fuscous ; poisers and/ee^ yellowish-white ; tarsi and spines 

 fuscous, the latter half the length of the first tarsal joint ; 

 coxx yellowish-white, with a few short, black, rigid hairs 

 on the exterior sides and tip, particularly the anterior pair; 

 abdomen compressed, dusky above ; sides dull yellowish 

 on the tips of the segments. 



% 9 Length to tip of the abdomen one-fifth of an inch. 



The wing nervures are arranged as in M. y*a5c^a/«, Meig. 

 excepting that there are three abbreviated nervures, as in 

 M. lateralis of the same author. 



2. M. maculipennis. Yellowish; thorax trilineate; 

 wings three-spotted. 



Inhabits North-west Territory. 



Body pale yellowish ; vertex dusky ; thorax with a 

 double fuscous line attenuated and abbreviated behind, but 

 near, the middle ; and a larger line on each side abbrevi- 

 ated before, confluent behind, extending upon the scutel ; 

 a spot of the same colour above the insertion of the wings ; 

 pleura with about two dusky spots, one over the insertion 

 of each of the posterior feet; wings with three blackish 

 spots on the costal margin, of which one is on the middle; 

 the second much beyond the middle, obsoletely extended 

 into an undulated band ; the third is near the tip ; feet 



Vol. II. 47 



