NO. 1310. NORTH AMERICAN THYSANOPTERA— HINDS. 169 



IfeliotJirijis JioeiiiorrJwIdaHi^ Pergande, Pnyche, III, 1882, }>. 381. 



Ileliuthripn Lekevre, Ent., XY, 1882, p. 240. 



Thrips haemorrlioidalis Feic, Pfirodopi.s zivocisstva, 1882, p. 113. 



Hellothrips huemorrhoidalis Lixtner, 2d Kept. Ins. N. Y., 1885, pp. 29, 31, 38, 56. 



Helioihrips haemorrhaidalis , Bull. Soc. Ent. Belgique, XXIX, 1885, p. lxx. 



HdiotJtrlps adonidum Cameron, Trans. Nat. Hist. Soc. Glasgow (new ser. ), I, 



1886, p. 301. 



Ileliothripif liaemorrhoiduUi^ Targioni-Tozzetti, Cronaca entomcilogica dell aiiiio, 



1887, (1888), p. 5 (7). 



Ileliothrips haemorrhoidalis Jordan, Zeit. f. Wissens. Zool.,XLVII, 1888, ]>p. 541- 



620, pis. xxxvi-xxxviii. 

 Ilcliothripi^ harinorrhoidaUs Reuter, Meddal. af. 8oc. Fauna Flora Fenn., XYll, 



1891, pp. 164-165. 

 Helioihrips haemorrhoidalls Uzel, Mon. d. Ord. Thysanopt., 1895, pp. 168-170, 



pi. VI, figs. 90-92. 

 TJirips {Heliothripn) haeniorrhoidalis Frank, Die tierparasitiiren Kranklieiten der 



Pflanzen, 1896, p. 134. 

 Ildiothrips hiiemorrhoidalis Bufpa, Riv. Patol. Yeget., VII, No. 1-4, pp. 94-108; 



continued, VII, Nos. 5-8, 1898, pp. 129-135,136-142. 

 Hellothrips luieinorrlioldalls Tumpel, Die Geradfiiigler Mitteleuropas, 1901, ]>. 290. 



Female.- — Length 1.23 mm. (1,12 to 1.39 mm.); width of mesothorax 

 0.30 mm. (0.25 to 0.35 mm.). Color of head and thorax dark brown; 

 abdomen ^'^ellowi.sh brown, fading- at tip to brownish yellow. Entire 

 body and legs .showing reticulating chitinous thickenings, which are 

 heaviest upon the head, thorax, and anterior sides of abdomen. Head 

 one-fourth wider than long, outline ver}- irregular and rough; cheeks 

 slightly concaved, narrowed abruptly near posterior edge into a short 

 neck; anterior margin strongly arcuate; dorsal surface of head bears 

 a few small spines, the bases of which appear li*ke small air bubbles 

 in the angles of reticulations; frons reticulated. Ej^es protruding 

 considerably, strongl};' pustulated; three ocelli situated on sides of an 

 elevation between the eyes, separated considerably from margins of 

 eyes, pale yellowish, verj' faintly or not at all margined inwardly by 

 crescentic pigmentation. Mouth cone short, blunt, not i-eticulated; 

 maxillary palpi three segmented, second segment longest; labial palpi 

 short. Anteunie twice as long as head; relative lengths of segments 

 as follows: 



15.5 



Second segment thickest, others very slender, especiall}^ peduncle 

 and basal half of three; seventis nearly cylindrical, narrow, no thicker 

 than liases of four and five; eight is very slender, tapering slightly, 

 and l)earing a single very slender bristle at its tip. Color of one and 

 two light brownish yellow^; three, four, and five clear pale yellowish; 

 six abruptly })rown, yellowish in })asal third; seven and eight gray. 

 Spines upon antennal segments pale and inconspicuous, three especially 

 long ones being situated one each upon the outer angles of three and 



