252 (ALIFORXIA ACADEMY OF SCIF.NCES [Proc. 4th Sek. 



41 . Aciura maculata Cole, new species 



. (Plate 19, fig. 27) 



Male : Frons, face and antennae yellow, the frons very broad with short 

 whitish bristles; vertical and fronto-orbital bristles longer; head white 

 poUinose; occiput gray with short white bristles; third joint of antennae 

 rounded at tip; arista brown. 



Thorax, pleura and scutellum cinereous ; mesonotum with four long 

 bristles ; whole dorsum of thorax thickly covered with short, thick white 

 bristles ; three long black bristles on the shoulders ; two long bristles on 

 margin of scutellum ; pleura with short whitish bristles ; halteres blackish. 



Abdomen shining and mostly blackish, some reddish brown on dorsum of 

 second, third and fourth segments. 



Femora mostly black, cinereous pollinose ; the tips and part underneath 

 tibiae and tarsi brownish yellow ; tips of tarsi blackish ; wings dark brown 

 and marked with hyaline spots (Fig. 27) ; anal cell paler brown. The 

 oblique hyaline band across end of wing is a good specific character. 



Two specimens from Jackson Co., collected May 28, 1916. 



Holotype (No. 510), male, in Museum of the California 

 Academy of Sciences. 



This species is very near ferruginea Doane in wing- pattern 

 but differs in several structural characters and has an apical 

 hyaline cross-band on the wing. 



Larvae in fruit of sei-vice berry {Amclanchicr sp.) and bred 

 out at Medford, Ore. 



42. Tritoxa pollinosa Cole, new species 



(Plate 19, fig. 28) 



Female : Not as slender in form as the typical species. Body of gen- 

 eral brown color. The thorax comparatively long. Wings with the charac- 

 teristic three hyaline cross-bands. Length 6 mm. 



Median stripe of frons dull yellow ; the reddish brown stripe on each 

 side, bordering the eyes, is almost obscured by w^hite pollen and is about 

 half as wide as the median section ; short black bristles, denser on sides of 

 frons ; ocellars short and slightly proclinate as are small scattered bristles ; 

 the vertical and fronto-orbitals slightly reclinate ; face yellowish, white in 

 certain lights, with a reddish mark in center from oral margin half-way up 

 the face and down on to yellowish clypeus ; palpi yellow with black hairs ; 

 antennae reddish, the third joint blackish above and more than twice as 

 long as first two joints; arista black and finely pubescent; middle of cheeks 

 with a brown spot under the eye which reaches to oral margin (Fig. 28) ; 

 occiput yellowish brown, white pollinose below, especially on sides. 



Thorax and pleura reddish brown ; dorsum with golden pollen ; two 

 widely separated gray pollinose stripes running length of dorsum; praescu- 

 tellar callosities and region around them bare of pollen and reddish ; 

 dorsum with many short black hair-like bristles wliich do not reach 

 pleural suture, however ; one humeral bristle ; two strong bristles in front 

 of scutellum arising from brown spots; a smaller bristle on each side and 

 in front of these two strong bristles on the dorso-central line ; two strong 



