184 THE CANADIAN ENTOMOLOGIST 



the only main difference from the published description. The fore-wings are 

 shaded as described, but in addition have their extreme basal portions, (scale 

 and fore-wing), shaded brown-gray. The measurements of the British Columbia 

 specimens may be briefly given as follows: 



Head, length .15 mm., width across occiput .19 mm.; prothorax, length 

 .15 mm., width at centre .22 mm.; total length of body, 1.7 mm-1.8 mm.; fore- 

 wing, length .94 mm.-l.Ol mm.; antennae, length .40 mm.-.42 mm.; antennal 

 segments, length: 



Segment 12 3 4 5 6-9 



Length 30 52 105-122 87-96 70 52 



In addition, the following notes are added to the description already given 

 by Hood: 



Fore-wings. — Cross-veins present; two cross-veins connecting anterior 

 ring vein to first longitudinal vein, one connecting the two longitudinal veins, 

 one and (apparently) sometimes two connecting second longitudinal vein to 

 posterior margin of wing; spines on anterior margin of ring vein 37-41, on 

 first or anterior longitudinal vein 13-16 (arranged 6-8 brown, 2-3 white, 4-6 

 brown), on second or posterior longitudinal vein 19-21 (arranged 1 white, 

 18-20 brown) ; on scale 5-6 on anterior margin and one central. The two wings 

 of the same specimen often vary in the matter of alar spines. 



Maxillary /?a/^/.— 3-segmented, geniculate, basai joint twice as broad and 

 nearly twice as long as the middle joint, apical small ; labial palpi 4-segmented, 

 basal joint as long as the remainder. 



^olothrips auricestus, new species. 

 (Plate XV, figs. 6, 7. and plate XVI, fig. 2.) 



I am indebted to Mr. J. D. Hood, of the United States Biological Survey, 

 for confirming my beljief, that this species has not been previously described. 



Measurements.- — ^Head, length .18 mm., width across occiput .21 mm.; 

 prothorax, length .18 mm., width .22 mm.; mesothorax, length .24 mm., width 

 .35 mm.; abdomen, length 1.48 mm. Total length of body about 2.08 mm.; 

 antenna?, total l,ength .44 mm.; antennal lengths: 



Segment 1 2 3 4 5 6-9 



Length 35 61 113-122 87-91 70 70 



Colour. — Brown ; head slightly darker brown than other parts of the body ; 

 antennal segment 1, brown; 2, brown at base (at times light brown at base) 

 shading to white at tip';. 3, creamy -white with a circlje of brown at tip; 4, palie- 

 brown at base shading to brown at tip; remaining segments similar to segment 

 1. Legs brown, fore-legs lighter; fore-tibiie and tarsi light-brown; abdomen 

 segments 2-6 golden-yellow, last four segments brown, segment 1 light brown 

 shading to yellow on posterior half. Fore-wings banded, with two brown 

 areas between three cljear white ones, each area of about equal width. Hind 

 wings banded, similar to the fore-wings, but the bands of brown are pale and 

 indistinct. Scale shaded brown at base. 



Head. — Slightly wider than long, about equal in length to the prothorax, 

 slight transverse striations across occiput, covered with numerous snaall spines; 



