NO. 1310. NORTH AMERICAN THYSANOPTERA— HINDS. 171 



HELIOTHRIPS FASCIAPENNIS, new species. 

 Plate VI, figs. 58-61. 



FeiiKiJe. — Length 0.92 mm. (0.90 to CO-imm.); width of mesothorax 

 0.22 mm. (0.22 and 0.23 mm.), (leneral color yellowish brown or 

 dark l)rown. Head, thorax, and legs distinctly but not deeply 

 reticulated. 



Head about one and one-third times as wide as long; form rather 

 rectangular; front margin depressed at insertion of antenna^; cheeks 

 nearly straight. Eyes dark, (piite large, prominent but hardl}" pro- 

 truding, margins lighter; ocelli present, approximate, pale 3'ellow 

 with dark crescentic margins, well removed from ej'es. Maxillarj^ 

 palpi small, two segmented. Antenna? eight segmented, twice as 

 long as head: relative lengths of segments: 



Segment one much narrower than two and ahnost spherical; two is 

 thickest segment and but little longer than thick; three and four fusi- 

 form; five clavate; six and seven together of same form as five only 

 inverted; eight very slender and terminated by an equally long hair. 

 Segments one and two, outer half of five, six, seven, and eight brown; 

 three, four, and basal half of five pale yellow. Spines on three, four, 

 and five long, dark, and prominent; color around bases of those on 

 three and four brownish. 



Prothorax as long as head and less than twice as wide as long; sides 

 rounded slightly and diverging somewhat posteriorly; without prom- 

 inent spines at angles; concolorous with head and reticulation of about 

 same depth. Mesothorax somewhat wider than prothorax; anterior 

 edge about straight and angles nearh^ right angular; membrane 3'ellow; 

 plates brown. Wings long, overreaching the abdomen; fore wing 

 quite slender bej^ond basal fourth at which point the hind longitudinal 

 vein branches from the fore vein; width in middle about one-fifteenth 

 its length; ])oth veins run close to edges of the wing, the fore one 

 becoming fused with the costa while the hind one remains distinct. 

 Internal veins set with few short spines; costa set with stout spines 

 but without fringe except for slight vestiges along the middle; hind 

 fringe long, dark, and wav3^ Wing dark brown crossed with three 

 bands of white as follows: At one-fifth, three-fifths, and four-fifths its 

 length; outer part of scale also white; the brown area at the tip is 

 confined to edge on border around last fifth, the middle here being 

 grayish and in continuation of the last white band. Legs fairly stout 

 but not thickened, weakly reticulated; femora yellowish brown to 

 dark brown; front pair lightest and yellow at tips; fore tibia? yellow 

 shaded with brown around middle; the other tibia? brown, j^ellow at 



