INSECUTOR INSCITI^ MENSTRUUS 137 



Pleura, propleura one bristle, rarely two ; mesopleura thickly 

 covered with long black hairs except a bare patch from the disk 

 widening to the sternopleura; a bunch of twenty hairs below 

 the disk. Pteropleura centrally near the anterior edge with a 

 square patch of long fine hairs. Sternopleura with one or two 

 strong bristles at top corner, the rest almost entirely covered 

 with long fine hairs, which are longer between the coxae, but 

 are not bristles. 



Abdomen entirely covered with long fine hair ; the usual 

 apical bristles are not seen. Male hypopygium, claspers dis- 

 tinct, except perhaps for Leria tincta which I have not 

 examined. 



Legs thickly and entirely covered with long thin hair, mid 

 tibia spurs curved, wings subhyaline, basal cells yellow, large 

 cross vein slightly infuscated, sometimes blackish. 



The female is the same as the male, but the humeral and 

 dorso-central bristles seem always present and strong. 



Described from 137 specimens from Cranbrook and Michel, 

 British Columbia, taken in March to August, being 45 male 

 and 92 female. Named gigas for its large size. 



Morpholeria, new genus (from morpho, meaning "wanting 



form," from Leria). 



Foremost f ronto-orbital bristle from a half to three-quarters 

 the length of the hind one; no prosternal bristle. Otherwise 

 as Leria Loew. 



Morpholeria melaneura, new^ species. 



Foremost fronto-orbital nearly three-quarters of the hind 

 one ; no prosternal bristle ; four dorso-centrals, one humeral. 



Length about 2.5 to 3 mm. Head : Occiput, gray brown, an- 

 tennae to front, orange yellow, face and cheeks red-yellow ; 

 antenna dark red brown, arista very short ; about two-thirds 

 the diameter of the eye, or as long as the vibrassa, which is 

 longish, and a single row of hairs below to the lower corner. 



Thorax drab brown, shades of a dark median stripe, and 

 along the roots of the dorso-centrals ; dorsum very sparingly 

 hairy, but regularly. 



