286 THE CANADIAN ENTOMOLOGIST 



male with row of about six proclinate weak orbital bristles situated 

 well in front outside frontal row, usually two or three more strongly 

 developed than the others. Male front at vertex about equal to 

 one eye, vibrissas hardly meeting. Macrochsetae of mesoscutum, 

 scutellum and abdomen long, rather thickly and evenly distributed, 

 interspersed with long bristly hairs; apical scutellar pair well- 

 developed and decussate. Abdominal macrochsetai only marginal, 

 two median on first segment, about four median on second segment, 

 practically complete row on third and anal segments, all very 

 closely placed. 



Arabiopsis cocklei new species. 



Length of body 5 mm.; of wing 4 mm. One male, London 

 Hill Mine, Bear Lake, British Columbia, 7,000 ft., July 21, 1903 

 (J. W. Cockle). 



Blackish, front and face heavily silvered, changing to a leaden 

 shade with incidence of light; frontalia invaded on each side about 

 middle b}' an irregular patch from parafrontals whose light incidence 

 .is contrasted with that of frontalia, whereby the latter alternate 

 with the patches in brilliancy according to the change of light. 

 Mesoscutum thinly silvery on sides and in front, showing four 

 narrow black vittae, of which the middle ones stop at suture; in 

 very oblique lights the scutellum and disk of mesoscutum are Seen 

 to be also covered with a thin coat of silvery pollen, but this is 

 invisible in direct view. Abdomen blackish below and broadly so 

 above, with rather broad silvery margin on sides, leaving a small 

 blackish spot segregated from the median black on hind margin 

 of second and third segments laterally. Legs wholly black, the 

 femora silvery on outer surface. Wings clear; tegulae whitish, 

 narrowly bordered with pale yellowish. Third antennal joint soft 

 black with a grayish sheen, arista deep black. 



Holotype, No. 19554 U.S.N.M. 



This species is named in honour of Mr. J. W. Cockle. 



Family Salmacildce. 

 Knabia new genus. 



Genotype — Knabia hirsnta Townsend, new species. 

 Differs from Salmacia as follows (male only described) : Front 

 at vertex distinctlv less than one-half head-width. Frontal 



