inse;cutor insciti^ me:nstruus 129 



Pleura color of dorsum, but shading darker to sternopleura,' 

 where it is blackish or grayish. Propleura one bristle; meso- 

 pleura bare, except two strong long hairs below disk. Ptero- 

 pleura with four to seven longish hairs. Sternopleura one 

 strong bristle, and all covered with fine medium long hair; a 

 row of bristles between the coxae. 



Abdomen gray black, tip slightly edged with yellowish ; all 

 segments with regular, short, thick black hair, but segment 

 three on latero-ventral part of the dorsal plate covered with 

 very many close longish black hairs, like a brush. Segments 

 three to six with apical row of bristles. 



Legs and coxse red-yellow, tips of tarsi slightly darker, fore 

 femora infuscated gray-black. 



Wings hyaline, veins yellowish, small cross vein not infus- 

 cated, which is usually so in pectinata. 



Described from three females, taken in June at Cranbrook, 

 British Columbia. 



Though I have taken many local males they all seem to be 

 the true pectinata, which occurs here also, as I have several 

 females too. Pectmerata is very close to it, but is larger than 

 local pectinata. 



Oecothea canadensis, new species. 



Only one fronto-orbital bristle, no prosternal. 



Length 4 mm. Head brown ; front to antennas yellowish, 

 as are the face and cheeks. One strong vibrissa, below which 

 is a single row of six or seven hairs, the first four long and 

 strong. Antennae dark red-brown, arista long black, the basal 

 swelling brown, microscopically pubescent. 



Thorax brown, darkish, the edges, humeral and scutellum 

 yellow-brown ; dorsum with many short thick black hairs, the 

 notopleura bare and near it. Scutellum much raised from the 

 postnotum in lateral view. 



Pleura dark brown, the edges of the divisions lighter ; 

 sternopleura black brown, with one strong bristle and another 

 weaker ; posterior part with scattered short hairs, becoming 

 bristles below the coxae. Postnotum black-brown. 



