143 INSECUTOR INSCITI^ MENSTRUUS 



der bristles ; pleurae with mostly light pile. Pile on coxae light ; 

 legs blackish brown, knees light brown. Abdomen shining dark 

 blue, with light pile. Wings faintly tinted ; apical cross-vein 

 tends to be slightly upturned on its distal end; third vein 

 broadly curved downward. Squamae white with yellowish bor- 

 der and cilia ; halteres reddish yellow. Length 9 mm. ; wing 

 8 mm. 



Type.— C2it. No. 25376, U. S. Nat. Mus. ; female, Hoquiam, 

 Washington, May 18, 1903. H. E. Burke collector. Male, allo- 

 type, Hoquiam, Washington, reared from Tsuga heterophylla. 

 Also one female, Dewalto, Washington, June 7, 1906, and 

 Moscow, Idaho, both taken by Dr. J. M. Aldrich. 



This species was determined as C. alaskensis by Coquillett 

 and is the name used by Burke in his paper, "Black Check in 

 Western Hemlock," Bureau of Entomology Circular 61, 1905. 

 (See C. catalina.) 

 Chilosia pontiaca, new species. 



Female. — Rather small, shining dark blue species ; eyes and 

 face hairy. Frontal, facial and mesonotal pile black. Antennae 

 reddish yellow ; arista brown, pubescent, longer than width of 

 f rons ; tubercle prominent, extending beyond antennal base. 

 Scutellum with stiff bristles. Sternopleurae with light pile, 

 pleurae elsewhere with black pile. Legs black, knees brown ; 

 pile on coxae black and light. Abdomen shining dark blue, with 

 short black pile ; wings faintly tinged ; apical corner of first 

 posterior cell acute ; squamae faintly yellow ; halteres yellow. 

 Length 7 mm. ; wing 6.25 mm. 



Type. — In C. W. Johnson's collection. 



Three specimens, Halfway House, Mount Washington, New 

 Hampshire, July 6. 1914 (C. W. Johnson). 

 Cartosyrphus kincaidia, new species. 



Eyes bare; arista minute pubescent; face bare; scutellum 

 with bristles ; female with face, humeri and scutellum black : 

 male with opaque bands. 



Male. — Ocellar triangle with black and whitish pile; frontal 

 triangle black with black pile. Antennae reddish yellow, first 

 two joints darkest; third joint longer than broad ; arista reddish 



